In re: Nexium Antitrust v. ( 2015 )


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  •           United States Court of Appeals
    For the First Circuit
    Nos. 14-1521, 14-1522
    IN RE NEXIUM ANTITRUST LITIGATION
    ASTRAZENECA AB, et al.,
    Defendants-Appellants,
    v.
    UNITED FOOD AND COMMERCIAL WORKERS UNIONS AND EMPLOYERS MIDWEST
    HEALTH BENEFITS FUND, et al.,
    Plaintiffs-Appellees.
    APPEALS FROM THE UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF MASSACHUSETTS
    [Hon. William G. Young, U.S. District Judge]
    Before
    Torruella, Dyk,* and Kayatta,
    Circuit Judges.
    Kannon K. Shanmugam, with whom Dane H. Butswinkas, Paul B.
    Gaffney, John E. Schmidtlein, Williams & Connolly LLP, Laurence A.
    Schoen, Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C., Jay P.
    Lefkowitz, Karen N. Walker, Kirkland & Ellis LLP, Kevin D.
    McDonald, Jonathan Berman, Jones Day, Timothy C. Hester, Covington
    & Burling LLP, Michael P. Kelly, William A. Zucker, McCarter &
    English, LLP, Leslie F. Su, Minerva Law, P.C., J. Douglas
    Baldridge, Lisa Jose Fales, Danielle R. Foley, Sarah Choi, and
    Venable LLP were on brief, for defendants-appellants.
    Kenneth A. Wexler, with whom Wexler Wallace LLP, Steve D.
    *
    Of the Federal Circuit, sitting by designation.
    Shadowen, Hillard & Shadowen LLC, J. Douglas Richards, Cohen
    Milstein Sellers & Toll, PLLC, Jayne A. Goldstein, Pomerantz
    Grossman Hufford, Dahlstrom & Gross LLP, Glen DeValerio, and Berman
    DeValerio were on brief, for plaintiffs-appellees.
    Kathryn Comerfold Todd, Tyler R. Green, National Chamber
    Litigation Center, Inc., Jeffrey S. Bucholtz, Ashley C. Parrish,
    Karen F. Grohman, and King & Spaulding LLP, on brief for Chamber of
    Commerce of the United States of America, as amicus curiae in
    support of defendants-appellants.
    Daniel E. Gustafson, Gustafson Gluek PLLC, Prof. Joshua P.
    Davis, Albert A. Foer, Richard Brunell, and Randy M. Stutz, on
    brief for American Antitrust Institute, as amicus curiae in support
    of plaintiffs-appellees.
    Ellen Meriwether, Cafferty Clobes Meriwether & Sprengel, LLP,
    and David A. Balto, on brief for Community Catalyst, Inc., National
    Legislative Association for Prescription Drug Prices, United States
    Public Interest Research Group, and American Independent Business
    Alliance, as amici curiae in support of plaintiffs-appellees.
    Scott L. Nelson and Julie A. Murray, on brief for Public
    Citizen Litigation Group, as amicus curiae in support of
    plaintiffs-appellees.
    January 21, 2015
    -2-
    DYK, Circuit Judge.
    AstraZeneca1 sells a heartburn drug called Nexium and
    owns several patents related to the Nexium compound, a method of
    using Nexium, and the process for manufacturing Nexium ("the Nexium
    patents").    Nexium is a proton-pump inhibitor, a type of drug that
    decreases the symptoms of heartburn by reducing gastric acid
    production.
    Three generic drug companies, Ranbaxy,2 Teva,3 and DRL4
    (collectively, the "generic defendants"), sought to market generic
    forms of Nexium.      AstraZeneca sued these generic companies for
    infringement of some of the Nexium patents. AstraZeneca eventually
    settled with each generic manufacturer.        Under the settlement
    agreements, AstraZeneca paid the generic defendants significant
    sums in the form of cash or debt forgiveness (so-called "reverse
    payments") in exchange for not challenging the validity of the
    Nexium patents and for delaying the launch of their respective
    generic products until the two main patents covering the drug
    1
    AstraZeneca AB, Aktiebolaget Hassle, and AstraZeneca LP.
    2
    Ranbaxy Pharmaceuticals, Inc., Ranbaxy Inc., and Ranbaxy
    Laboratories Ltd.
    3
    Teva   Pharmaceutical      Industries,   Ltd.     and      Teva
    Pharmaceuticals USA Inc.
    4
    Dr. Reddy’s       Laboratories,   Ltd.   and    Dr.     Reddy’s
    Laboratories, Inc.
    -3-
    product itself expired on May 27, 2014.5                      As of the date of this
    opinion, no generic substitute has been launched.
    The named plaintiffs are union health and welfare funds
    that        reimburse       plan    members   for     prescription    drugs      including
    Nexium.        Plaintiffs alleged that the Nexium patents are invalid
    because        they     would       have   been     obvious   in    light   of    earlier
    AstraZeneca patents and other references.                          The European Patent
    Office and the Canadian courts have held that the European and
    Canadian Nexium patents are invalid.
    Plaintiffs alleged that the settlement agreements between
    AstraZeneca           and     the     generic     defendants       (collectively,       the
    "defendants")           constituted        unlawful    agreements     not   to    compete
    because of the likely invalidity of the Nexium patents, the size of
    AstraZeneca’s payments to the generic defendants, and the fact that
    generic defendants provided nothing to AstraZeneca other than an
    agreement        not    to    compete.        Plaintiffs      contend   that      but   for
    defendants’ anti-competitive conduct, a generic version of Nexium
    would have been available as early as April 2008, thereby lowering
    the price through competition.                    They asserted that AstraZeneca
    overcharged for Nexium from April 14, 2008, to at least May 27,
    2014 ("the class period").                 They claim damages under the antitrust
    and consumer protection laws of 24 states and the District of
    5
    Five of the Nexium patents expired on or before this
    date.
    -4-
    Columbia.6    The plaintiffs sought class certification for a class
    of third-party payors ("TPPs") (i.e., insurance plans), such as the
    named plaintiffs, and individual consumers.7
    On November 14, 2013, the district court certified a
    class consisting of:
    All persons or entities in the United States and its
    territories who purchased or paid for some or all of the
    purchase price for Nexium or its AB-rated generic
    equivalents . . . in capsule form, for consumption by
    themselves, their families, or their members, employees,
    insureds, participants or beneficiaries, during the
    period April 14, 2008[,] through and until the
    anticompetitive effects of Defendants’ unlawful conduct
    cease.
    Add. 40a.     The certified class also included certain exceptions
    discussed below.       The defendants sought to appeal the class
    certification.    We granted this interlocutory appeal under Federal
    Rule of Civil Procedure 23(f) to review the class certification.8
    6
    The plaintiffs did not assert federal antitrust claims.
    In Illinois Brick Co. v. Illinois, 
    431 U.S. 720
    , 746—48 (1977), the
    Supreme Court held that indirect purchasers of goods produced by
    firms engaged in anti-competitive conduct were too remote from that
    conduct to have suffered an injury under the Clayton Act. As a
    result, plaintiffs bring their suits under state law in states with
    "Illinois Brick" repealer laws which have granted indirect
    purchasers the right to sue for antitrust violations.
    7
    Plaintiffs filed this suit on August 24, 2012, in the
    Eastern District of Pennsylvania. The United States Judicial Panel
    on Multidistrict Litigation transferred the case to the District of
    Massachusetts in December 2012.
    8
    The district court has since granted various summary
    judgment motions that narrow the claims against certain generic
    defendants.   In particular, the district court granted summary
    judgment to Teva and DRL finding that plaintiffs have not shown the
    existence of a "large, unjustified reverse payment" to        these
    -5-
    We conclude that class certification is permissible even
    if the class includes a de minimis number of uninjured parties. We
    hold that the district court did not abuse its discretion by
    certifying the class here and determining that at the certification
    stage, it had not been shown that future proceedings would not be
    manageable consistent with defendants’ Seventh Amendment and due
    process rights.
    I.
    A.
    Both the Supreme Court in FTC v. Actavis, 
    133 S. Ct. 2223
    ,
    2227–29   (2013),      and    the   district     court       below,    In    re    Nexium
    (Esomeprazole) Antitrust Litigation, 
    968 F. Supp. 2d 367
    (D. Mass.
    2013),    have   discussed      extensively      the     regulatory         and    patent
    framework of this suit.          We discuss it briefly here.
    The Food, Drug, and Cosmetic Act ("FDCA") requires drug
    manufacturers     to    secure        approval    from       the   Food      and     Drug
    Administration      ("FDA")      to    market    a     new     drug.        21     U.S.C.
    § 355(b)(1), (d).            To obtain approval, a new drug application
    defendants.   However, the district court found that there was
    "sufficient circumstantial evidence" to "infer a conspiracy among
    the Defendants." J.A. 636 ¶ 3. The district court also concluded
    that Ranbaxy was not likely to launch "at-risk."      However, the
    defendants make no contention that these various rulings affect the
    proper composition of the class. In the interim after trial, the
    jury returned a verdict in favor of defendants. See In re Nexium
    Antitrust Litig., No. 12-md-02409 (D. Mass. Dec. 8, 2014), ECF No.
    1374.   This, of course, does not moot the case here given the
    possibility of further proceedings.
    -6-
    ("NDA") must include scientific data showing that the drug is safe
    and   effective   for   its   proposed   purpose,   requiring   that    the
    manufacturer conduct long and costly clinical trials.              Caraco
    Pharm. Labs., Ltd. v. Novo Nordisk A/S, 
    132 S. Ct. 1670
    , 1676
    (2012).
    The Hatch-Waxman Amendments9 introduced two mechanisms to
    the FDCA to enable early marketing of generic substitutes.         First,
    to market a generic drug, the manufacturer need only file an
    abbreviated new drug application ("ANDA") showing that the generic
    product has the same active ingredients as, and is biologically
    equivalent to, the brand name drug.         
    Id. Second, Hatch-Waxman
    protects the original NDA-filer by barring FDA approval of an ANDA
    that is alleged to infringe a patent until the patent cases have
    been resolved (or 30 months have elapsed) and provides a means for
    early resolution of patent disputes. Eli Lilly & Co. v. Medtronic,
    Inc., 
    496 U.S. 661
    , 676–78 (1990).
    To this end, the NDA-filer must list the number and
    expiration date of any patent which claims the drug that is the
    subject of the NDA or a method of manufacture or use of that drug
    in the FDA’s so-called "Orange Book."        21 C.F.R. § 314.53.       Upon
    filing, the ANDA applicant must notify the NDA-filer if it is
    asserting that some or all of these listed (and unexpired) patents
    9
    Also known as the Drug Price Competition and Patent Term
    Restoration Act of 1984. 98 Stat. 1585.
    -7-
    are “invalid or will not be infringed by the manufacture, use or
    sale    of      the    [generic]       drug"      (known     as     a   paragraph        IV
    certification). 21 U.S.C. § 355(j)(2)(A)(vii)(IV). A paragraph IV
    certification is treated as an act of infringement, and the branded
    drug manufacturer may immediately sue the generic manufacturer for
    infringement          based     on     this       certification.             35       U.S.C.
    § 271(e)(2)(A). If the branded drug manufacturer sues, the FDA may
    not approve the ANDA until 30 months pass or an appellate court
    finds     the    patent        invalid     or     not     infringed.           21     U.S.C.
    § 355(j)(5)(B)(iii).
    On December 3, 1999, AstraZeneca filed an NDA to market
    Nexium.         The    FDA     approved    AstraZeneca’s          NDA   in     2001,     and
    AstraZeneca listed fourteen patents in the Orange Book. Four years
    later, generic manufacturer Ranbaxy filed an ANDA and filed a
    paragraph       IV    certification        with     its    ANDA    that      the      listed
    AstraZeneca          patents    were      not     infringed       or    were        invalid.
    AstraZeneca sued Ranbaxy, alleging that Ranbaxy’s product would
    infringe six of its patents, including the patents covering the
    drug product itself.            In the next few years, Teva and DRL also
    filed ANDAs and paragraph IV certifications, and were sued in
    separate actions by AstraZeneca for infringement of many of the
    same Nexium patents, including the drug product patents.
    For first-filer Ranbaxy, the 30 month period triggered by
    AstraZeneca’s suit expired on April 14, 2008. As a result, Ranbaxy
    -8-
    could have begun marketing its product on April 14, 2008, if it
    launched "at-risk" — i.e., before the court ruled on patent
    invalidity or infringement.      However, on the date that Ranbaxy
    could have launched a Nexium substitute, Ranbaxy and AstraZeneca
    settled their patent litigation, and the district court entered a
    consent judgment.    Ranbaxy admitted the validity of AstraZeneca’s
    asserted patents, admitted that its generic product infringed those
    patents, and agreed to delay the launch of its generic product
    until May 27, 2014, the date that the main drug product patents
    expired.   In exchange, AstraZeneca agreed to pay Ranbaxy over a
    billion dollars.    Subsequently, AstraZeneca entered into separate
    settlement agreements with Teva and DRL.      The provisions of these
    agreements were similar to AstraZeneca’s agreement with Ranbaxy,
    and both Teva and DRL also agreed to delay their respective generic
    product launches until May 27, 2014, in exchange for substantial
    monetary   consideration.10     These   agreements    raised   antitrust
    concerns because they were agreements between competitors not to
    compete.
    The   agreements   between   AstraZeneca   and   the   generic
    defendants are known as reverse payment settlements.              Unlike
    traditional settlements, where "a party with a claim . . . for
    10
    Both Teva and DRL owed AstraZeneca substantial damages
    from other patent infringement suits. In exchange for Teva and
    DRL’s concessions, AstraZeneca agreed not to collect these
    payments.
    -9-
    damages receives a sum equal to or less than the value of its
    claim[,] [i]n reverse payment settlements . . . a party with no
    claim for damages . . . walks away with money simply so it will
    stay away from the patentee’s market." 
    Actavis, 133 S. Ct. at 2233
    .
    The   Supreme   Court     in    Actavis    concluded     that   reverse   payment
    settlements are properly evaluated under the antitrust laws using
    a rule of reason analysis.                
    Id. at 2237.
         Actavis specified
    particular factors indicating that an agreement was an unreasonable
    restraint of trade, including whether the reverse payment was
    "large and unjustified," measured by "its size, its scale in
    relation to the payor’s anticipated future litigation costs, its
    independence from other services for which it might represent
    payment, and the lack of any other convincing justification."                
    Id. at 2237.
    Plaintiffs here alleged that the Nexium patents were
    likely     invalid   or   not    infringed    by   the    generic   defendants’
    products, and the payments were not made in exchange for any
    services performed by the generic defendants.                     As a result,
    defendants’     agreements        constituted      an    unlawful    horizontal
    conspiracy to foreclose generic competition.                Plaintiffs claimed
    that because drug prices fall significantly with generic entry, the
    prices of generic Nexium in the "but-for" market11 would have been
    11
    "[B]ut for [defendants’] [a]greements, generic versions
    of Nexium would have been available to [p]laintiffs and members of
    the Class in the United States as early as April 14, 2008." J.A.
    -10-
    lower than the branded Nexium prices during the class period absent
    generic entry.        In addition, in the early period, purchasers of
    branded Nexium would have paid supracompetitive prices as well. As
    a   result,    the     class     members     were    injured     by     defendants’
    overcharges.
    The merits of plaintiffs’ antitrust challenge are not
    before us.12     The issue is whether the district court properly
    certified plaintiffs’ Rule 23(b)(3) damages class.
    B.
    The district court below concluded that plaintiffs "ha[d]
    sufficiently demonstrated a showing of adequacy of representation
    and predominance of common questions to the class to meet the
    requirements     of    class     certification       under     Rules    23(a)    and
    23(b)(3)."     Add. 2a.13       Specifically, the district court decided
    that    plaintiffs     had     adequately    shown    that     (1)     "prices   for
    esomeprazole     [during       the   class    period]    continued        [to    be]
    artificially high as a result of the Defendants’ reverse payment
    agreements," and (2) "that all class members have been exposed to
    127 ¶ 2.
    12
    In September 2013, the district court concluded that the
    plaintiffs had plausibly alleged antitrust injury to survive
    defendants’ 12(b)(6) motion, i.e., that defendants’ exercise of
    market power generated anti-competitive consequences.       In re
    
    Nexium, 968 F. Supp. 2d at 393
    . See also 
    n.8, supra
    .
    13
    Plaintiffs here initially included Pharmacy Benefit
    Managers ("PBMs") in the class definition.    PBMs bought Nexium
    directly from AstraZeneca and sold it to TPPs and consumers.
    -11-
    purchasing         or    paying    for      esomeprazole     magnesium        at    a
    supracompetitive         price."     Add.    19a—20a.       The    district   court
    determined that some members of the class did not suffer injury,
    perhaps "including more than a de minimis number of TPPs and
    consumers." Add. 20a. But despite the presence of uninjured class
    members, the court determined that "[defendants’ expert] failed
    reliably to quantify the prevalence of his alleged problematic
    subgroups and thus fail[ed] to establish that they are sufficiently
    extensive to undermine [plaintiffs’ expert’s] conclusion[]" that
    the vast majority of class members were injured.                          Add. 22a.
    Finally, in keeping with the Supreme Court’s admonition that "class
    certification ought not . . . turn into a ‘free-ranging merits
    inquir[y]’ through unnecessary demands for exact calculations of
    damages," the district court concluded that "[a]t this stage in
    class certification . . . the incidence of uninjured consumers and
    TPPs are insufficient to overcome a showing of common antitrust
    impact   to    the      putative   class,     but   the   Court    preserves       the
    Defendants’ right to challenge individual damage claims at trial."
    Add. 12a (citing Amgen, Inc. v. Connecticut Ret. Plans & Trust
    Funds, 
    133 S. Ct. 1184
    , 1194—95 (2013)); Add. 24a.
    We    review   class   certification        orders    for   abuse     of
    discretion.        Smilow v. Sw. Bell Mobile Sys., Inc., 
    323 F.3d 32
    , 37
    (1st Cir. 2003) (citing Califano v. Yamasaki, 
    442 U.S. 682
    , 703
    (1979)).      "An abuse of discretion also occurs if the court adopts
    -12-
    an incorrect legal rule."      Waste Mgmt. Holdings, Inc. v. Mowbray,
    
    208 F.3d 288
    , 295 (1st Cir. 2000).         A "class certification appeal
    ‘can pose pure issues of law reviewed de novo.’" In re New Motor
    Vehicles Canadian Export Antitrust Litig., 
    522 F.3d 6
    , 17 (citing
    Tardiff v. Knox County, 
    365 F.3d 1
    , 4 (1st Cir. 2004)).              Factual
    determinations are reviewed for clear error.              
    Id. (citing In
    re
    PolyMedica Corp. Sec. Litig., 
    432 F.3d 1
    , 4 (1st            Cir. 2005)).
    II.
    Defendants   contend   that   the    class   certification    is
    improper because the class includes members who were not injured by
    generic foreclosure — for example, individual consumers who would
    have continued to purchase branded Nexium for the same price after
    generic entry.     Understanding the defendants’ challenge requires
    description of the standards for class certification, only one of
    which is at issue on appeal.
    To certify a 23(b)(3) class, the district court must
    undertake a "rigorous analysis" to determine whether plaintiffs met
    the   four   threshold    requirements     of    Rule   23(a)   (numerosity,
    commonality, typicality, and adequacy of representation) and Rule
    23(b)(3)’s two additional prerequisites. Comcast Corp. v. Behrend,
    
    133 S. Ct. 1426
    , 1432 (2013); Wal-Mart Stores, Inc. v. Dukes, 
    131 S. Ct. 2541
    , 2551 (2011); see also Gen. Tel. Co. of Sw. v. Falcon,
    
    457 U.S. 147
    , 161 (1982).     Defendants do not dispute that the four
    -13-
    Rule 23(a) requirements were met here.   In addition, Rule 23(b)(3)
    permits certification only if
    the court finds that the questions of law or fact common
    to class members predominate over any questions affecting
    only individual members, and that a class action is
    superior to other available methods for fairly and
    efficiently adjudicating the controversy.14
    Fed. R. Civ. P. 23(b)(3).
    To meet the predominance requirement, the party seeking
    certification must show that "the fact of antitrust impact can[] be
    established through common proof" and that "any resulting damages
    would likewise be established by sufficiently common proof."     New
    Motor 
    Vehicles, 522 F.3d at 20
    (emphasis added). The party also
    bears the burden of "affirmatively demonstrat[ing] his compliance"
    with the Rule 23 requirements.    
    Comcast, 133 S. Ct. at 1432
    .    The
    district court concluded that plaintiffs had done so here, despite
    finding that the certified class included some number of uninjured
    class members.
    14
    The matters pertinent to these findings include:
    (A)    the class members’ interests in individually
    controlling the prosecution or defense of separate
    actions;
    (B) the extent and nature of any litigation concerning
    the controversy already begun by or against class
    members;
    (C) the desirability or undesirability of concentrating
    the litigation of the claims in the particular
    forum; and
    (D) the likely difficulties in managing a class action.
    -14-
    On appeal, defendants ask us to reverse the class-certification
    decision, relying on two related arguments.      First, defendants
    contend that the presence of any uninjured class members (even a de
    minimis number) defeats the 23(b)(3) predominance requirement
    because the existence of uninjured class members precludes the use
    of common proof at trial.   Second, defendants contend that even if
    a de minimis number of potentially uninjured class members would
    not defeat class certification, more than a de minimis number of
    class members were uninjured here.
    III.
    A.
    Relevant to the question of whether a class can include
    uninjured members, three principles are established.      First, a
    class action is improper unless the theory of liability is limited
    to the injury caused by the defendants.       In other words, the
    defendants cannot be held liable for damages beyond the injury they
    caused.   The Supreme Court emphasized this principle in Comcast.
    The   plaintiffs in that case had initially relied on four theories
    of liability and had calculated aggregate damages based on all four
    
    theories. 133 S. Ct. at 1434
    . But the district court certified the
    class based on only one theory, and plaintiffs did not provide a
    damages calculation for that one theory standing alone.        
    Id. Because the
    plaintiffs relied on "a methodology that identifies
    damages that are not the result of the wrong[,]" they did not
    -15-
    establish that "damages are capable of measurement on a classwide
    basis," failing to meet the Rule 23(b)(3) requirement.                         
    Id. at 1434,
          1433.15    Here,   in   contrast,       the    plaintiffs’     theory   of
    liability is appropriately limited.                 As defendants concede, the
    plaintiffs’ theory and model for damages would only require that
    the defendants pay aggregate damages equivalent to the injury that
    they caused.
    Second, the definition of the class must be "definite,"
    that    is,     the   standards     must    allow    the    class    members   to   be
    ascertainable. See William B. Rubenstein, Newberg on Class Actions
    §§   3:1,      3:3    (5th   ed.    2013)    (explaining      that    an   "implied"
    requirement for certification is that "a putative class [is]
    ascertainable with reference to objective criteria"); Matamoros v.
    Starbucks Corp., 
    699 F.3d 129
    , 139 (1st Cir. 2012) (holding that a
    class was not "unascertainable and overbroad" where it was defined
    15
    Other circuits have also adopted this understanding of
    Comcast.   See In re Urethane Antitrust Litig., 
    768 F.3d 1245
    ,
    1258–59 (10th Cir. 2014) (explaining the expert’s benchmarks in
    Comcast became "useless" upon a ruling that three of the liability
    theories could not be used); In re Deepwater Horizon, 
    739 F.3d 790
    ,
    815 (5th Cir. 2014) (explaining that Comcast stands for the
    proposition that formulas for classwide measurement of damages
    should not be "incompatible" with liability theories); Butler v.
    Sears, 
    727 F.3d 796
    , 799 (7th Cir. 2013) (A damages model must
    "measure only those damages attributable to [the liability] theory.
    If the model does not even attempt to do that, it cannot" meet the
    requirements of Rule 23(b)(3). (citing 
    Comcast, 133 S. Ct. at 1433
    )), cert. denied, 
    134 S. Ct. 1277
    (2014); Leyva v. Medline
    Indus. Inc., 
    716 F.3d 510
    , 514 (9th Cir. 2013) ("[P]laintiffs must
    be able to show that their damages stemmed from the defendant’s
    actions that created the legal liability." (citing 
    Comcast, 133 S. Ct. at 1435
    )).
    -16-
    in terms of an "objective criterion"); Carrera v. Bayer Corp., 
    727 F.3d 300
    , 306 (3d Cir. 2013) (As an "essential prerequisite of a
    class action," plaintiffs "must show, by a preponderance of the
    evidence, that the class is currently and readily ascertainable
    based on objective criteria." (citing Marcus v. BMW of North
    America, LLC, 
    687 F.3d 583
    , 592—93 (3d Cir. 2012) (internal
    quotation marks omitted)).   The class definition here satisfies
    these standards by being defined in terms of purchasers of Nexium
    during the class period (with some exceptions that also satisfy
    objective standards).
    Third, where an individual claims process is conducted at
    the liability and damages stage of the litigation, the payout of
    the amount for which the defendants were held liable must be
    limited to injured parties.16 At the class certification stage, the
    16
    We do not address here problems that arise where the
    distribution of the recovery is not based on an individual claims
    process: for example, where the amount of recovery for each
    individual class member is so small that it is not practical to
    engage in an individual claims process. In such circumstances some
    courts have resorted to awarding the recovery from the defendants
    to charities whose missions are consistent with the litigation,
    under the "cy pres" doctrine, or to a group of individuals that
    closely approximates the class, under the "fluid recovery" process.
    See, e.g., Comment: Manageability of Notice and Damage Calculation
    in Consumer Class Actions, 
    70 Mich. L
    . Rev. 338, 366 n.185 (1971)
    (describing the settlement of the case Daar v. Yellow Cab, 
    67 Cal. 2d
    695 (1967), in which a taxi company reduced fares to offset
    gains it had made with higher rates). There is no suggestion here
    that an individual claims process is not feasible.
    Nor do we deal here with the problem that arises where the
    amounts awarded to individual claimants are less than the aggregate
    award. See Newberg, supra, § 12:28 (outlining common ways of
    distributing "unclaimed" funds).
    -17-
    court must be satisfied that, prior to judgment, it will be
    possible to establish a mechanism for distinguishing the injured
    from the uninjured class members.            The court may proceed with
    certification so long as this mechanism will be "administratively
    feasible,"    see   
    Carrera, 727 F.3d at 307
    ,   and   protective   of
    defendants’ Seventh Amendment and due process rights, see American
    Law   Institute,    Principles   of    the   Law:   Aggregate    Litigation,
    §§ 2.02(a)(3), 2.07(d) cmt. j (2009) (indicating that the court
    should exercise discretion to authorize aggregate treatment only if
    it would "not compromise the fairness of procedures for resolving
    any remaining issues presented by such claims" and that "due
    process in aggregation . . . extend[s] to persons opposing the
    aggregate group litigating related claims on an aggregate basis").
    The defendants here dispute the plaintiffs’ compliance
    with the third set of requirements primarily because the class
    includes some number of brand-loyal consumers who would continue to
    purchase branded Nexium even when a generic becomes available.
    Defendants argue that "the [brand-loyalist issue] presents problems
    that plaintiffs cannot overcome, for plaintiffs have no methodology
    to identify [at a later stage of litigation] those consumers who
    would have switched to a generic version."               Appellant’s Br. 22.
    Defendants assert that the plaintiffs’ expert admitted that her
    damages model did not limit recovery to injured parties.
    -18-
    While it is true that a proper mechanism for exclusion of
    brand-loyalist consumers has not yet been proposed, plaintiffs’
    expert made no concession that such a mechanism could not be
    developed, nor did defendants’ expert say that it could not be
    developed.
    In order to address whether an appropriate mechanism can
    be   developed,   it   is   useful   to   consider   how    injury   would   be
    established outside of the class action context — that is, in an
    individual consumer suit for antitrust damages. In that situation,
    as here, by definition there are no records concerning generic
    purchases during the class period since no generic was on the
    market.   Under these circumstances there appear to be at least two
    ways that the consumer could establish injury.             The first would be
    to argue for a presumption that consumers would purchase the
    generic if it were available, i.e., a presumption that economically
    rational consumers faced with two identical products would purchase
    the less expensive alternative.       This presumption would be similar
    to the presumption of reliance in securities class actions and
    would be subject to rebuttal by the defendant. See Halliburton Co.
    v. Erica P. John Fund, Inc., 573 U.S. ___, 
    134 S. Ct. 2398
    , 2408,
    2412 (2013) (presumption of reliance in Basic, Inc. v. Levinson,
    
    485 U.S. 224
    (1988), applies to class action, but is subject to
    rebuttal by defendants).      We do not decide whether applying such a
    presumption would be appropriate.
    -19-
    But even if a presumption were determined not to be
    appropriate, another approach exists. This other approach would be
    to establish injury through testimony by the consumer that, given
    the choice, he or she would have purchased the generic.                Such
    testimony, if unrebutted, would be sufficient to establish injury
    in an individual action.       And if such consumer testimony would be
    sufficient to establish injury in an individual suit, it follows
    that similar testimony in the form of an affidavit or declaration
    would be sufficient in a class action.              There cannot be a more
    stringent burden of proof in class actions than in individual
    actions.    "Rigorous analysis," 
    Falcon, 457 U.S. at 161
    , of Rule 23
    requirements does not require raising the bar for plaintiffs higher
    than they would have to meet in individual suits.17
    Thus, we have confidence that a mechanism would exist for
    establishing injury at the liability stage of this case, compliant
    with the requirements of the Seventh Amendment and due process.
    See Madison v. Chalmette Refining, LLC, 
    637 F.3d 551
    , 556 (5th Cir.
    2011)     (approving,    in   the    context   of    class   certification,
    consideration    of     possible    “case   management   tools,   including
    narrowing the claims and potential plaintiffs through summary
    17
    The cases relied on by the dissent rejecting the use of
    affidavits involved affidavits concerning the past purchase of the
    product in question (necessary for class membership), not
    affidavits concerning likely future purchases of the consumers, as
    to which documents are not available. See 
    Marcus, 687 F.3d at 593
    ;
    
    Carrera, 727 F.3d at 304
    .
    -20-
    judgment    [or]   facilitating      the    disposition    of    the    remaining
    plaintiffs’ claims through issuance of a Lone Pine order [requiring
    affidavits from plaintiffs]”).
    Defendants have merely speculated that a mechanism for
    exclusion cannot be developed later.               This is not enough to
    overcome plaintiffs’ case for having met the requirements of Rule
    23.   See 
    Smilow, 323 F.3d at 40
    (decertification unnecessary where
    existence of individualized issues is "a matter of conjecture");
    Gunnells v. Healthplan Servs., Inc., 
    348 F.3d 417
    , 430 (4th Cir.
    2003)    (defeating     adequacy   requirement    of    Rule    23     requires   a
    conflict that is "more than merely speculative or hypothetical").
    Defendants also assert that any mechanism of exclusion
    that requires determination of the individual circumstances of
    class members is improper.         But the Supreme Court in Amgen and the
    circuits in other cases have made clear that the need for some
    individualized determinations at the liability and damages stage
    does not defeat class certification.              Rule 23(b)(3) "does not
    require a plaintiff seeking class certification to prove that each
    element of her claim is susceptible to classwide proof."                     
    Amgen, 133 S. Ct. at 1196
    (alterations and citations omitted).                   Rather,
    the     question   is    whether    there    is   "reason       to   think    that
    [individualized] questions will overwhelm common ones and render
    class certification inappropriate . . . ."             
    Halliburton, 134 S. Ct. at 2412
    (2014) (emphasis added).           For example, damages will not be
    -21-
    uniform across the class.     But it is well-established that "[t]he
    individuation of damages in consumer class actions is rarely
    determinative under Rule 23(b)(3).       Where . . . common questions
    predominate regarding liability, then courts generally find the
    predominance requirement to be satisfied even if individual damages
    issues remain." 
    Smilow, 323 F.3d at 40
    ; Newberg, supra, § 4:54 (It
    is a "black letter rule . . . that individual damage calculations
    generally do not defeat a finding that common issues predominate
    . . . .").
    Even in cases where "the issue of injury-in-fact [not
    just damages calculation] presents individual questions, . . . it
    does not necessarily follow that they predominate over common ones
    and that class action treatment is therefore unwarranted."     Cordes
    & Co. Fin. Servs., Inc. v. A.G. Edwards & Sons, Inc., 
    502 F.3d 91
    ,
    108 (2d Cir. 2007) (emphasis added).     We do not think the need for
    individual determinations or inquiry for a de minimis number of
    uninjured members at later stages of the litigation defeats class
    certification.    As contemplated by Halliburton, the district court
    also explicitly recognized the need to "preserv[e] the Defendants’
    right to challenge individual damage claims at trial."      Add. 24a.
    B.
    In light of these three requirements — ensuring the class
    is definite, limiting aggregate recovery to the amount of the
    injury, and ensuring recovery by only injured parties — it is
    -22-
    difficult to understand why the presence of uninjured class members
    at   the   preliminary   stage   should   defeat   class   certification.
    Ultimately, the defendants will not pay, and the class members will
    not recover, amounts attributable to uninjured class members, and
    judgment will not be entered in favor of such members. Some number
    of uninjured members will receive a class notice, but the district
    court can easily assure that defendants will not pay for notice to
    uninjured members.18 At worst the inclusion of some uninjured class
    members is inefficient, but this is counterbalanced by the overall
    efficiency of the class action mechanism.      Moreover, excluding all
    uninjured class members at the certification stage is almost
    impossible in many cases, given the inappropriateness of certifying
    what is known as a "fail-safe class" — a class defined in terms of
    the legal injury.19
    18
    "District courts may order a class action defendant to
    pay the cost of class notification after they determine that the
    defendant is liable on the merits."       Hunt v. Imperial Merch.
    Servs., Inc., 
    560 F.3d 1137
    , 1144 (9th Cir. 2009). However, fee
    shifting is discretionary, and the Supreme Court has cautioned that
    "courts must not stray too far from the principle" that plaintiff
    "should bear all costs relating to the sending of notice because it
    is he who seeks to maintain the suit as a class action."
    Oppenheimer Fund, Inc. v. Sanders, 
    437 U.S. 340
    , 350 (1978).
    19
    As the district court noted, a fail-safe class is one in
    which "it is virtually impossible for the Defendants to ever ‘win’
    the case, with the intended class preclusive effects." Add. 26a
    n.5; see Young v. Nationwide Mut. Ins. Co., 
    693 F.3d 532
    , 537 (6th
    Cir. 2012) (A fail-safe class "is prohibited because it would allow
    putative class members to seek a remedy but not be bound by an
    adverse judgment—either those class members win or, by virtue of
    losing, they are not in the class and are not bound." (citations,
    internal quotation marks omitted)).
    -23-
    In    certifying    a   (b)(3)    class   there   is   an    almost
    inevitable tension between excluding all non-injured parties from
    the defined class and including all injured parties in the defined
    class.    Ideally, that tension should be resolved by adopting a
    class definition that includes no uninjured parties and excludes no
    injured parties. See Messner v. Northshore Univ. Healthsystem, 
    669 F.3d 802
    , 825 (7th Cir. 2012) ("Defining a class so as to avoid, on
    one hand, being over-inclusive and, on the other hand, the fail-
    safe problem is more of an art than a science.").             We doubt that
    this will be feasible in many cases.              Without the benefit of
    further proceedings, it is simply not possible to entirely separate
    the injured from the uninjured at the class certification stage.
    And as the Supreme Court noted in Amgen, "Rule 23 grants courts no
    license   to     engage   in   free-ranging    merits   inquiries       at   the
    certification 
    stage." 133 S. Ct. at 1194
    –95.
    Finally, Defendants' objections to certifying a class
    including uninjured members run counter to fundamental class action
    policies.      As the Supreme Court has repeatedly recognized, while
    "[t]he class action device was designed as an exception to the
    usual rule that litigation is conducted by and on behalf of the
    individual named parties only," it is nonetheless "peculiarly
    appropriate when the issues involved are common to the class as a
    whole."   
    Falcon, 457 U.S. at 155
    (citing 
    Califano, 442 U.S. at 701
    (internal quotation marks omitted)).          In particular, when amending
    -24-
    Rule 23 to include section (b)(3), "the Advisory Committee sought
    to cover cases in which a class action would achieve economies of
    time, effort, and expense, and promote . . . uniformity of decision
    as to persons similarly situated." Amchem Prods., Inc. v. Windsor,
    
    521 U.S. 591
    , 615 (1997) (citing Adv. Comm. Notes, 28 U.S.C. App.,
    p. 697) (internal quotation marks omitted). In Amchem, the Supreme
    Court recognized what types of cases were best adjudicated under
    this amended section — "[w]hile the text of Rule 23(b)(3) does not
    exclude from certification cases in which individual damages run
    high, the Advisory Committee had dominantly in mind vindication of
    the rights of groups of people who individually would be without
    effective strength to bring their opponents to court at all."   
    Id. at 617
    (internal quotation marks omitted).
    The plaintiff class members in this case appear to be the
    very group that Rule 23(b)(3) was intended to protect.       As we
    discuss later in this opinion, the actual overcharge to each class
    member was generally a small amount per prescription and too small
    to warrant individual litigation. See Carnegie v. Household Int’l,
    Inc., 
    376 F.3d 656
    , 661 (7th Cir. 2004) ("The realistic alternative
    to a class action is not 17 million individual suits, but zero
    individual suits, as only a lunatic or a fanatic sues for $30.").
    As this court noted in New Motor 
    Vehicles, 522 F.3d at 8
    , "an
    erroneous failure to certify a class where individual claims are
    -25-
    small may deprive plaintiffs of the only realistic mechanism to
    vindicate meritorious claims."
    C.
    Despite the obvious utility of allowing the inclusion of
    some uninjured class members in the certified class and the lack of
    harm in doing so, the defendants rely on authority from the Supreme
    Court and from this court for the proposition that plaintiffs must
    nonetheless prove that every putative class member suffered injury
    to prevail on class certification.        But the authority cited by the
    defendants do not impose any such requirement.
    The defendants cite Wal-Mart, where the Supreme Court
    reversed the class certification because plaintiffs could not show
    Wal-Mart had a common policy of discriminating against 
    women. 131 S. Ct. at 2553
    .   As a result, plaintiffs did not meet the Rule 23(a)
    commonality requirement.     
    Id. But the
    Wal-Mart Court nowhere
    stated that at the class certification stage, every member of the
    class must establish that he, she or it was in fact injured by the
    common policy of discrimination.         
    Id. at 2550—55.
    Defendants’ reliance on Comcast is equally misdirected.
    As we explained above, Comcast did not require that plaintiffs show
    that all members of the putative class had suffered injury at the
    class certification stage — simply that at class certification, the
    damages calculation must reflect the liability 
    theory. 133 S. Ct. at 1434
    .
    -26-
    The    Supreme      Court     also    addressed     the    treatment    of
    potentially uninjured class members last term in Halliburton.                          In
    securities cases like Halliburton, investors can recover damages
    only    if    they   can    prove    that    they    relied     on   the      defendant’s
    misrepresentation in deciding to buy or sell a company’s 
    stock. 134 S. Ct. at 2405
    .           Under Basic, Inc. v. Levinson, 
    485 U.S. 224
    (1988), a plaintiff securities class can satisfy the reliance
    requirement at class certification by invoking a presumption of
    reliance,      rather      than   proving     direct    reliance        on    defendant’s
    misrepresentation for each individual class member.                          
    Halliburton, 134 S. Ct. at 2408
    , 2412.             Basic permits defendants to rebut this
    presumption using individualized evidence "showing that [the class
    member] did not rely on the integrity of the market price in
    trading stock." 
    Id. at 2412.
    The Halliburton Court concluded that
    "[w]hile [the rebuttal] has the effect of leaving individualized
    questions of reliance in the case, there is no reason to think that
    these    questions      will      overwhelm    common      ones   and    render    class
    certification inappropriate under Rule 23(b)(3)."                       
    Id. (internal quotation
    marks omitted).            Even if "the defendant might attempt to
    pick    off    the   occasional      class     member      here   or    there    through
    individualized rebuttal . . . individual questions [did not]
    predominate" over common questions.                  
    Id. Thus, the
    Halliburton
    Court contemplated that a class with uninjured members could be
    -27-
    certified if the presence of a de minimis number of uninjured
    members did not overwhelm the common issues for the class.
    The    law    in    this    circuit    is    not   to   the   contrary.
    Defendants argue that this court in New Motor Vehicles held that to
    obtain class certification, plaintiffs must establish at class
    certification that "each class member was harmed by the defendants’
    
    practice." 522 F.3d at 28
       (internal     quotation      marks   and
    alterations omitted).            To the extent that New Motor Vehicles is
    read to impose such a requirement, it has been overruled by the
    Supreme Court’s Halliburton decision.                    But, in fact, New Motor
    Vehicles imposes no such requirement.                 In that case, plaintiffs
    alleged that defendant automobile manufacturers illegally colluded
    to restrict the flow of Canadian cars into the United States to
    maintain higher prices in the United States.                    
    Id. at 10.
            This
    court was concerned that even if plaintiffs showed that defendants’
    anti-competitive conduct increased the vehicle list price in the
    United States, plaintiffs did not have evidence showing that the
    list price was actually paid by the class members.                   
    Id. at 27—28.
    New Motor Vehicles recognized that plaintiffs’ theory "must include
    some means of determining that each member of the class was in fact
    injured," and that at the liability stage, there must be a showing
    "that class members were injured at the consumer level."                      
    Id. at 28.
      There was no basis for concluding that the plaintiffs there
    -28-
    could separate the injured from the uninjured at the liability
    stage.
    But New Motor Vehicles did not impose a requirement that
    the   injury   determination   must   be    completed   by   the   class-
    certification stage — only that "the district court [have] enough
    information to evaluate preliminarily whether the proposed model
    will be able to establish . . . which consumers were impacted by
    the alleged antitrust violation and which were not." 
    Id. (emphasis added).
       Uninjured   members   of   the   putative    class   would   be
    identified in the liability proceedings later in the case, as
    Halliburton contemplates.20
    20
    New Motor Vehicles does not suggest separation of the
    injured from the uninjured must be possible "without need for
    individual determination" — only that separating the injured from
    the uninjured must be possible using a common test rather than an
    individual ad hoc 
    approach. 522 F.3d at 28
    .      The other circuit
    cases defendants rely on do not suggest otherwise. For instance, in
    In re Hydrogen Peroxide Antitrust Litigation, the Third Circuit,
    which cited many of the cases the defendants cite, suggested that
    if "fact of [antitrust] damage cannot be established for every
    class member through proof common to the class, the need to
    establish antitrust liability for individual class members defeats
    . . . predominance." 
    552 F.3d 305
    , 311 (3d Cir. 2008) (emphasis
    added) (citing Bell Atl. Corp. v. AT&T Corp., 
    339 F.3d 294
    , 302
    (5th Cir. 2003)). However, the court explicitly noted that the
    "[p]laintiffs’ burden at the class certification stage is not to
    prove the element of antitrust impact" even if "to prevail on the
    merits each class member must do so."       
    Id. Rather, at
    class
    certification, plaintiffs must only show that "antitrust impact is
    capable of proof at trial through evidence that is common to the
    class rather than individual members."       
    Id. (emphasis added).
    Similarly, the D.C. Circuit has stated that at the class
    certification stage, plaintiffs must "show that they can prove" —
    not that they have proved — "through common evidence, that all
    class members were in fact injured . . . ." In re Rail Freight
    Fuel Surcharge Antitrust Litig., 
    725 F.3d 244
    , 252 (D.C. Cir.
    -29-
    "Numerous courts have certified plaintiff classes even
    though the plaintiffs have not been able to use common evidence to
    show harm to all class members."   Davis et al., The Puzzle of Class
    Actions with Uninjured Members, 82 G.W.L.Rev. 858, 859 (May 2014).
    In addition to Halliburton, cases from our sister circuits21 and
    this circuit22 hold that the presence of a de minimis number of
    2013). In a case where plaintiffs’ methodology "detects injury
    where none could exist[,]" and there is "no reliable means of
    proving classwide injury[,]" class certification must be denied.
    
    Id. at 252—53
    (emphasis added). But from this it does not follow
    that the existence of a de minimis number of uninjured class
    members bars certification if those members can be weeded out at a
    later stage.
    21
    See, e.g., 
    Messner, 669 F.3d at 819
    , 824—25 (vacating
    denial of class certification despite presence of potentially
    uninjured class members); Cordes & Co. Fin. 
    Servs., 502 F.3d at 107
    —08 (same); In re 
    Urethane, 768 F.3d at 1254
    (affirming class
    certification despite the fact that "some [of the plaintiffs]
    avoid[ed] injury altogether"); Pella Corp. v. Saltzman, 
    606 F.3d 391
    , 394 (7th Cir. 2010) (affirming class certification despite
    possibility that class included uninjured members); Kohen v. Pac.
    Inv. Mgmt. Co., 
    571 F.3d 672
    , 677 (7th Cir. 2009) (same); DG ex
    rel. Stricklin v. Devaughn, 
    594 F.3d 1188
    , 1198, (10th Cir. 2010)
    ("[C]ertification requirements neither require all class members to
    suffer harm . . . nor Named Plaintiffs to prove class members have
    suffered such harm."); Mims v. Stewart Title Guar. Co., 
    590 F.3d 298
    , 308 (5th Cir. 2009) ("Class certification is not precluded
    simply because a class may include persons who have not been
    injured by defendant’s conduct." (citation omitted)).
    22
    See Gintis v. Bouchard Transp. Co., 
    596 F.3d 64
    , 67 (1st
    Cir. 2010) (Souter, J.) (vacating and remanding district court’s
    denial of class certification and stating that "on remand, the
    focus will be on the plaintiffs’ claim that common evidence will
    suffice to prove injury, causation and compensatory damages for at
    least a very substantial portion of the claims that can be brought
    by the putative class members" (emphasis added)); 
    Tardiff, 365 F.3d at 6
    ("[U]ndue complications as to liability [were] limited. . . .
    If there was in fact a rule, custom or policy of strip searching
    every arrestee or a substantially overlarge category, then it is a
    -30-
    uninjured class members is permissible at class certification.   In
    fact, as one court has recognized at certification, "a class will
    often include persons who have not been injured by the defendant’s
    conduct; indeed, this is almost inevitable because at the outset of
    the case many of the members of the class may be unknown, or if
    they are known still the facts bearing on their claims may be
    unknown."    
    Kohen, 571 F.3d at 677
    . "Such a possibility or indeed
    inevitability does not preclude class certification."   
    Id. (citing 1
    Alba Conte & Herbert Newberg, Newberg on Class Actions § 2:4,
    pp. 73—75 (4th ed. 2002)).
    We think that a certified class may include a de minimis
    number of potentially uninjured parties.       We need not decide
    whether it is ever permissible to define a proper class including
    more than a de minimis number of uninjured parties since we
    conclude that it has not been shown that the class here includes
    more than a de minimis number of uninjured parties.
    IV.
    Defendants’ alternative argument is that more than a de
    minimis number of class members were uninjured here, barring class
    fair guess that most arrestees so classed were strip searched on
    this basis. (emphasis added)); 
    Mowbray, 208 F.3d at 296
    (noting
    that   "most   class   members’   claims   were   unaffected"   by
    "idiosyncratic"   statute   of   limitations   issues,   affirming
    certification because "the mere fact that such concerns may arise
    and may affect different class members differently does not compel
    a finding that individual issues predominate over common ones"
    (emphasis added)).
    -31-
    certification.        In addressing this argument, we conduct a detailed
    inquiry into the parties’ and experts’ economic analyses, keeping
    in mind that this is an indirect purchaser action.                 The Supreme
    Court in Illinois Brick, in holding that indirect purchasers may
    not bring suit for damages under the Clayton Act, noted the
    "uncertainties and difficulties in analyzing price and output
    decisions ‘in the real economic world rather than an economist’s
    hypothetical      model’"      and   reasoned    that   actions   by     indirect
    purchasers would often result in "long and complicated" proceedings
    when such purchasers attempted to prove that a price increase was
    passed on to 
    them. 431 U.S. at 732
    .
    Twenty-four states eventually disagreed, creating private
    causes of action for indirect purchasers under state antitrust
    laws. That such actions are thus allowed under those laws does not
    eliminate the real economic and litigation complexities identified
    by the Supreme Court.         It should therefore not be surprising that
    determining whether and when certification of indirect purchaser
    class actions may bear the added complexity entails considerable
    thought and effort.
    Here, a class member suffered antitrust injury if that
    individual or entity was overcharged for Nexium during the class
    period.   There is no serious dispute that the majority of class
    members were injured.         It is undisputed that the price that would
    have   been    paid    by    class   members    for   generic   Nexium   but-for
    -32-
    defendants’ conduct ("but-for price") is lower than the actual
    price paid by class members during the class period for branded
    Nexium ("class period price").         For those class members who were
    reimbursed for their purchases by an insurance plan and paid only
    a copayment, it is similarly undisputed that the generic copayment
    is almost always lower than the brand-name copayment.            The dispute
    here focuses on various purchasers who were atypical and allegedly
    uninjured.
    In   proving   injury,   plaintiffs   relied   on   the   expert
    testimony of Professor Meredith Rosenthal, Professor of Health
    Economics and Policy at the Harvard School of Public Health and an
    Academic Affiliate of Greylock McKinnon Associates, a consulting
    and litigation support firm. Rosenthal assumed that plaintiffs had
    proven defendants’ anti-competitive conduct and offered an opinion
    on the antitrust impact of the alleged generic foreclosure.               To
    calculate the class period price — the actual prices paid by class
    members for branded Nexium during the class period, Rosenthal used
    data from the IMS National Prescription Audit. However, because no
    generic forms of Nexium were on the market, there was no data to
    show firsthand the prices of branded and generic Nexium after
    generic entry.      To calculate the but-for prices, Rosenthal relied
    on the "yardstick" approach which approximates the but-for market
    by using data from similar markets.
    -33-
    Because Nexium is a proton-pump inhibitor, Rosenthal
    examined     other   drugs   in   that     therapeutic    class    for   their
    suitability as a yardstick.       She selected Prevacid (lansoprazole)
    because it was launched closest in time to Nexium (November 2009),
    and had a similar profile of generic entrants as Nexium in terms of
    number and size.      Rosenthal corroborated her calculations of the
    but-for    prices    using   defendants’     documents,    which    contained
    estimates of Nexium prices after generic entry.                   Rosenthal’s
    calculations showed that nearly all class members suffered an
    antitrust injury as a result of defendants’ conduct.
    Defendants argued that even though injured class members
    comprise a majority of the putative class, more than a de minimis
    number of class members were not injured, identifying five groups
    of class members that likely suffered no injury.                   Defendants’
    arguments were based on the expert testimony of Professor James W.
    Hughes, Thomas Sowell Professor of Economics at Bates College.
    Plaintiffs bear the burden of an initial showing that a
    proposed class satisfies the Rule 23 requirements.                
    Smilow, 323 F.3d at 38
    ; accord 
    Messner, 669 F.3d at 811
    ; In re Hydrogen
    
    Peroxide, 552 F.3d at 311
    —12. But "[plaintiffs] need not make that
    showing to a degree of absolute certainty.           It is sufficient if
    each disputed requirement has been proven by a preponderance of
    evidence."     
    Messner, 669 F.3d at 811
    (citing Teamsters Local 445
    Freight Div. Pension Fund v. Bombardier Inc., 
    546 F.3d 196
    , 202 (2d
    -34-
    Cir. 2008)); accord Alaska Elec. Pension Fund v. Flowserve Corp.,
    
    572 F.3d 221
    , 228 (5th Cir. 2009). Once plaintiffs have made their
    initial showing, defendants have the burden of producing sufficient
    evidence to rebut the plaintiff’s showing.
    Here, it is difficult to determine exactly what findings
    the district court made with respect to each of the five allegedly
    uninjured   groups   presented   by   the   defendants.   However,   the
    district court generally credited Rosenthal’s calculations.           It
    pointed out that Rosenthal’s figures showed "approximately 5.8
    percent of all class prescriptions were attributable to brand . . .
    transactions with no overcharge."           Add. 24a (emphasis added)
    (internal quotation marks omitted).         Neither the parties nor the
    district court presented a precise estimate of the number or
    percentage of uninjured class members, but on balance, the district
    court found defendants’ challenges did not suffice to overcome
    predominance.
    We consider here defendants’ contentions with respect to
    the five allegedly uninjured groups and the record materials.        We
    conclude that defendants’ argument that no class can be certified
    stems in large part from four errors in their analysis of the
    "uninjured" groups.
    First, defendants incorrectly assume that class members
    are shielded from injury by plan arrangements that the district
    court found did not exist.
    -35-
    Second, defendants incorrectly assume that a class member
    who is injured for only a part of the class period did not suffer
    injury, even though they have now conceded that an injury for part
    of the class period is sufficient to establish injury.    "Paying an
    overcharge caused by the alleged anticompetitive conduct on a
    single purchase suffices to show — as a legal and factual matter —
    impact or fact of damage."     Davis & Cramer, Antitrust, Class
    Certification, and the Politics of Procedure, 17 Geo. Mason L. Rev.
    969, 984—85 (2010) (internal quotation marks omitted) (citing Paper
    Sys., Inc. v. Nippon Paper Indus. Co., 
    281 F.3d 629
    , 633 (7th Cir.
    2002)).
    Third, defendants incorrectly assume that if a class
    member offsets an overcharge through later savings attributable to
    the same or related transaction, there is no injury. But antitrust
    injury occurs the moment the purchaser incurs an overcharge,
    whether or not that injury is later offset.    See Adams v. Mills,
    
    286 U.S. 397
    , 407 (1932) (“In contemplation of law the claim for
    damages arose at the time the extra charge was paid.     Neither the
    fact of subsequent reimbursement by the plaintiffs from funds of
    the shippers nor the disposition which may hereafter be made of the
    damages recovered is of any concern to the wrongdoers.” (citations
    omitted)); see also Hawaii v. Standard Oil Co. of Cal., 
    405 U.S. 251
    , 262 n.14 (1972) ("[C]ourts will not go beyond the fact of this
    injury to determine whether the victim of the overcharge has
    -36-
    partially recouped . . . .").               Here, if a class member is
    overcharged, there is an injury, even if that class member suffers
    no damages.
    Fourth,      defendants     incorrectly        treat     individual
    prescriptions of Nexium as a proxy for individual consumers.               For
    example, defendants mistakenly cite the district court’s findings
    that   "only      approximately       5.8     percent      of     all    class
    prescriptions . . . [had] no overcharge" and that "Nexium co-pay
    coupons were only used in 2-4 percent of prescriptions," Add. 24a
    (emphases added), to support the conclusion that "at least 7.8 to
    9.8% of the consumers — more than 100,000 consumers in all —
    suffered   no   injury."     Appellant’s      Br.   20    (emphasis     added).
    However, there is no necessary relationship between the percentage
    of prescriptions and the percentage of consumers since a class
    member may fill one prescription with an overcharge and another
    with no overcharge.
    In light of the correct standards, we discuss each of the
    five allegedly uninjured groups in turn — Groups 1 to 5.                   The
    question in each instance is whether the but-for price absent
    generic foreclosure would have been lower than the actual class
    period price of Nexium.
    Group 1.     This group consists of TPPs that would have
    allegedly paid a higher but-for price for generic Nexium than they
    actually   paid   for   branded   Nexium      during     the    class   period.
    -37-
    Defendants   contend    that   they   were   not   injured   because   they
    benefitted from rebates that reduced the actual class period price
    for branded Nexium.23    Defendants argue that Group 1 members were
    not injured because with the rebates, the actual class period
    Nexium price was lower than the but-for generic price.            However,
    defendants have not shown that this is the case.             Using Hughes’
    calculations, after accounting for the rebates, the average actual
    class period branded Nexium price was $121, while the but-for
    generic price would have been $113.24        Therefore, Group 1 TPPs who
    23
    These rebates were negotiated between PBMs and
    AstraZeneca. Both Rosenthal and Hughes agree that AstraZeneca paid
    approximately $12.9 billion in rebates to PBMs from 2008 to 2012.
    Because PBMs are not part of the class, the rebates only affect the
    class to the extent that they are "passed-through" from PBMs to
    TPPs. There is some disagreement as to whether the rebates are
    passed-through as a discounted price when the PBMs bill the TPPs or
    whether TPPs are charged the list price and then refunded a portion
    based on the rebate amount. If the latter, then all Group 1 TPPs
    were injured because the rebates are only a damages setoff and do
    not affect the fact of injury.
    Rosenthal calculated that approximately $10.3 billion in
    rebates was passed through to TPPs (an average discount of 39%),
    although Hughes alleges that the entire $12.9 billion was passed
    through (an average discount of 49%). For the purposes of these
    calculations, we assume that Hughes is correct — that all of the
    rebates were passed through.
    24
    Defendants also argue that Rosenthal improperly relied on
    averages to determine the fact of injury, with the result that some
    class members at the extreme would not suffer injury even though
    the average consumer did.    We think that the defendants cannot
    simply speculate that a more than de minimis number of class
    members departed from the average.     They have failed to submit
    evidence that this is the case.        Nor is it the case that
    plaintiffs’ average but-for price is so close to the average class
    period price that any deviation with either figure would eliminate
    the overcharge.
    -38-
    would have purchased generic Nexium during the class period were
    injured.
    Group 2.       TPPs usually pay for the prescription drug
    directly and then charge plan members a copayment (a flat payment)
    or a coinsurance (a percentage of the drug price).             Sometimes TPPs
    incentivize generic drug purchases by plan members by charging a
    lower   copayment   for    a   generic   drug   than   for    its   brand-name
    counterpart.   Defendants allege that under such plan arrangements,
    "the decrease in the co-payment is more than the total net price
    drop," Add. 21a (citing Def.’ Mem. Opp. Class Certification) —
    i.e., the difference between the actual branded Nexium price paid
    for by the TPP during the class period (absent generic entry) and
    the but-for generic price is less than the difference between the
    branded Nexium copayment (absent generic entry) and the but-for
    generic copayment.        As a result, defendants argue that Group 2
    members — TPPs that offered such plan arrangements — suffered no
    injury because the decreased revenue from copayments offset the
    increased savings from the lower generic price.              But as discussed
    above, that erroneous inference assumes that the decrease in
    copayment revenue should offset the increased actual savings in
    determining injury when it should not.
    In any event, defendants have presented no evidence to
    support this prediction.        Rosenthal’s projections show that the
    price difference between the branded Nexium price absent generic
    -39-
    entry and the but-for generic price would have been $47 at the
    beginning of the class period and $196 at the end.                      Plaintiffs’
    deposition testimony and other evidence established that a typical
    plan offered by TPPs has only a $10 or $20 spread between the
    generic and brand-name copayments.                  The defendants provided no
    evidence of any plans with a greater spread. The record shows that
    there        are    likely   no   Group   2    members    who   were   uninjured   by
    defendants’ conduct.
    Group 3. Some TPPs, according to Hughes, had fixed price
    agreements to pay PBMs the same amount for every drug in a given
    therapeutic class, regardless of the actual drug price.25                      As a
    result, defendants claim that Group 3 TPPs suffered no injury
    because they would have paid the same for generic Nexium in the
    but-for world as they actually paid for branded Nexium during the
    class period. But the defendants did not provide any evidence that
    such agreements existed.              Rosenthal stated that she has never
    encountered such an agreement in her research.                  The district court
    found that "[Hughes] does not establish the actual existence of
    [such] uninjured TPP groups."                 Add. 23a.    The district court did
    not err in finding insufficient evidence that Group 3 actually
    exists.
    25
    These hypothetical agreements are presumably with PBMs
    whereby the TPPs reimburse pharmacies the same amount for every
    drug in a particular therapeutic class.
    -40-
    Group 4. This group comprises consumers who used coupons
    that reduced the copayment that they paid for branded Nexium during
    the class period.    The assumption is that the coupons would not
    have been available in the but-for world and that the consumers
    would have switched to generic Nexium.    These coupons were offered
    by AstraZeneca starting in August 2011.     Eligible patients could
    use a "Nexium Savings Card" to pay only an $18 copayment for their
    prescription (with a maximum discount of $50).    Defendants assert
    that Group 4 members were not injured because with coupons, the
    actual branded Nexium copayment during the class period was lower
    than the but-for generic copayment would have been.         But the
    average branded Nexium copayment with the coupon was $18 (before
    generic entry), while the average but-for generic copayment would
    have been only $10-11. Thus these consumers were likely injured as
    well.
    Group 5.     This group comprises consumers who would
    continue to purchase only brand-name Nexium even after generic
    entry, known as brand-loyalists.      There are Group 5 members who
    paid the actual cost of the drug (i.e., uninsured consumers) or a
    percentage thereof (i.e., consumers with a coinsurance plan).
    Defendants argue that these class members would have suffered no
    injury because, after generic entry, the price of branded Nexium
    would have increased over the class period.         Defendants also
    contend that some plans charged a higher copayment for branded
    -41-
    drugs than for their generic substitutes with the result that
    brand-loyalist members of such plans would suffer no injury from
    the foreclosure of generic entry.26     In other plans, the copayment
    for the branded drug increased with generic entry.       As a result,
    defendants contend that Group 5 consumers are not injured because
    they would pay more with generic entry.
    We agree that some Group 5 consumers were likely not
    injured by defendants’ conduct.       The question is whether that is
    more than a de minimis number.      The district court found, based on
    Rosenthal’s projections, that 5.8% of all prescriptions during the
    entire six-year class period would have been for branded Nexium.
    Defendants argue that this shows that 5.8% "of the consumers" were
    uninjured.    Appellant’s Br. 20.    This does not follow for at least
    the following reasons:
    First, the number of prescriptions is not a necessary
    surrogate for the number of consumers.
    26
    Consumers who are members of plans with flat copayment
    structures (i.e., that charge the same copayment for both brand-
    name drugs and generic substitutes) were also uninjured whether
    they would have switched to the generic or were brand-loyalists.
    But these consumers are already excluded by the class definition —
    "‘flat co-pay’ ‘Cadillac Plan’ consumers who made purchases only
    via fixed dollar co-payments that do not vary between Nexium and
    its AB-rated generic equivalent." Add. 41a(f).
    One minor change to the class definition is required to
    exclude members of plans where the generic copayment after generic
    entry would be the same as the branded copayment before generic
    entry.
    -42-
    Second, consumers who purchased Nexium using cash or a
    coinsurance at the beginning of the class period were injured (even
    if they made later purchases that did not reflect injury) because
    in the early period the but-for branded Nexium price would have
    been lower than the actual         branded Nexium price in the early
    period.
    Third, a consumer was injured if he or she would have
    purchased generic Nexium even once during the class period. Because
    Nexium is a maintenance drug, there is a high likelihood that a
    generic purchase would occur.       Indeed, only 2% of prescriptions
    three years after generic entry would have been for branded Nexium.
    Significantly, state laws allow pharmacists to substitute generic
    products (some mandate substitution unless a physician prevents
    substitution).
    As Rosenthal explained, defendants are relying on the
    mere hope that there is a "likelihood of there being a substantial
    number of consumers whose only purchases during the entire Class
    Period were brand purchases . . . ."          J.A. 203.   While on this
    record it is impossible to precisely quantify the uninjured members
    in Group 5, we conclude that plaintiffs have provided more than
    enough evidence to meet their Rule 23 burden.
    What   counts   as   a   "de    minimis"   deviation   "from   a
    prescribed standard must, of course, be determined with reference
    to the purpose of the standard."          Wisconsin Dept. of Revenue v.
    -43-
    William Wrigley, Jr., Co., 
    505 U.S. 214
    , 232 (1992).                We thus
    define "de minimis" in functional terms.            Here, if common issues
    "truly predominate over individualized issues in a lawsuit, then
    the addition or subtraction of any of the plaintiffs to or from the
    class [should not] have a substantial effect on the substance or
    quantity of evidence offered."            Vega v. T-Mobile USA, Inc., 
    564 F.3d 1256
    , 1270 (11th Cir. 2009) (alteration in original, citation
    omitted).     Upon examination of the record, we see no basis for
    overturning the district court’s ultimate conclusion that the
    number of uninjured members here is not so large as to render the
    class impractical or improper, or to cause non-common issues to
    predominate.       Nor do we see a basis for concluding the number of
    uninjured class members here is so large as to violate defendants’
    7th Amendment or due process rights, in light of the fact that
    uninjured members can be excluded and the district court expressly
    "preserve[d] the Defendants’ rights to challenge individual damage
    claims at trial."      Add. 24a.
    Plaintiffs’ evidence has shown that the vast majority of
    class members were probably injured.             "Rigorous analysis" of the
    evidence does not show that the number of uninjured class members
    is more than de minimis.       The district court was well within its
    discretion    to    have   found   that    the   plaintiffs’   "rebuttal   to
    [defendants’] challenges [was] persuasive" and sufficient for a
    "showing of common antitrust impact to the putative class."            Add.
    -44-
    24a.   The defendants’ speculation cannot defeat the plaintiffs’
    showing.       See In re 
    Urethane, 768 F.3d at 1254
    (no abuse of
    discretion in not decertifying where plaintiffs had evidence of
    artificially     inflated    baseline   for   price   negotiations,   and
    defendants alleged plaintiffs "could have avoided the announced
    price increases, such as [by] negotiating for a lower price or
    switching to a substitute" (emphasis added)); 
    Messner, 669 F.3d at 825
       (once    plaintiffs    had   shown     broad   antitrust   impact,
    certification could not be denied just because defendants pointed
    to a class of uninjured members but "[gave] no indication how many
    such individuals actually exist"); 
    Kohen, 571 F.3d at 676
    —79 (where
    evidence did not show "great many" uninjured persons, defendants’
    pointing to "possibility" that unidentified number of class members
    were uninjured is insufficient to defeat certification, especially
    since defendants could depose a "random sample of class members to
    determine how many were [uninjured] and . . . could urge the
    district court to revisit its decision to certify"); see also In re
    Whirlpool Corp. Front-Loading Washer Products Liability Litig., 
    722 F.3d 838
    , 854—55 (6th Cir. 2013) (commonality not defeated simply
    because, though plaintiffs’ evidence showed washer models were
    nearly identical, defendants merely contended the class included
    owners who are "pleased with the performance of their" machines and
    are thus dissimilar to consumers who complained of a mold problem),
    cert. denied Whirlpool Corp. v. Glazer, 
    134 S. Ct. 1277
    (2014).
    -45-
    In the context of the plaintiffs’ having shown that the
    class does not "consist[] largely . . . of members who are
    ultimately shown to have suffered no harm," 
    Messner, 669 F.3d at 824
    , the number of uninjured members here seems comparable to the
    "2.4 percent decrease in the size of the class [due to removal of
    uninjured    members]"     that    the    Seventh    Circuit   concluded     was
    "certainly     not     significant       enough     to   justify    denial    of
    certification."       
    Id. at 826
    (emphasis added).
    V.
    Defendants also raise the separate but related argument
    that because each putative class member has not suffered injury,
    the class does not have standing.
    Article III standing is an "indispensable part" of any
    case that must be present at every stage of the case.              See Lujan v.
    Defenders of Wildlife, 
    504 U.S. 555
    , 561 (1992) (noting that
    standing must be "supported . . . at the successive stages of
    litigation").        Injury is a prerequisite to standing, and named
    plaintiffs need to satisfy this standing requirement throughout the
    stages of the litigation.         See Stearns v. Ticketmaster Corp., 
    655 F.3d 1013
    , 1021 (9th Cir. 2011) ("At least one named plaintiff must
    satisfy the actual injury component of standing in order to seek
    relief on behalf of himself or the class."), cert. denied, 
    132 S. Ct. 1970
    (2012); 
    Kohen, 571 F.3d at 676
    ("[A]s long as one member
    of a certified class has a plausible claim to have suffered
    -46-
    damages, the requirement of standing is satisfied."); see also DG
    ex rel. 
    Stricklin, 594 F.3d at 1197
    —98; In re Prudential Ins. Co.
    Am. Sales Practices Litig. Agent Actions, 
    148 F.3d 283
    , 306—7 (3d
    Cir. 1998).    It is undisputed that the named plaintiffs have shown
    that they were overcharged for at least one Nexium transaction
    during the class period, establishing standing. See Baker v. Carr,
    
    369 U.S. 186
    , 204—06 (1962).       The named plaintiffs thus have
    standing to sue for their injuries and to request, under Rule
    23(b)(3), that the court allow them to represent and secure a
    judgment on behalf of a class.
    To the extent that it is necessary that each and every
    member of the class who secures a recovery also has standing,27 the
    requirement will be satisfied — only injured class members will
    recover.28
    27
    Some circuits have suggested that this is a requirement.
    See Denney v. Deutsche Bank AG, 
    443 F.3d 253
    , 263—64 (2d Cir. 2006)
    ("[While] [w]e do not require that each member of a class submit
    evidence of personal standing [at the class certification stage,]
    . . . [t]he class must . . . be defined in such a way that anyone
    within it would have standing."); Halvorson v. Auto-Owners Ins.
    Co., 
    718 F.3d 773
    , 778 (8th Cir. 2013).
    28
    Defendants' Rules Enabling Act argument is similarly
    inapposite. While the Act would preclude recovery for uninjured
    class members, it imposes no requirement at the class certification
    stage beyond ensuring that a methodology can be developed that is
    capable of excluding uninjured members.
    -47-
    VI.
    In summary, we conclude that plaintiffs have met their
    burden in showing that the 23(b)(3) requirements are met with
    respect to the TPPs in the certified class because all TPPs would
    have suffered injury.    We also conclude that defendants have not
    established that more than a de minimis number of uninjured
    consumers are included in the certified class.
    In   large   part,    the     remaining   difference   between
    plaintiffs and defendants is that the defendants would require a
    determination at the class certification stage as to which parties
    were injured and which not, whereas the plaintiffs would leave to
    later stages of litigation such sorting of injured and uninjured
    parties.   We conclude that so long as it is established that such
    a mechanism can be identified, the presence of a de minimis number
    of uninjured members at the class certification stage does not
    defeat a class action.     We conclude that such a mechanism can be
    identified here.   The district court did not abuse its discretion
    in certifying the class.
    Costs to appellees.
    AFFIRMED
    -Dissenting Opinion Follows-
    -48-
    KAYATTA, Circuit Judge, dissenting.
    The chief difficulty we confront in this case arises from
    the fact that some of the members of the class have not suffered
    the antitrust injury upon which this entire case is predicated.
    This percentage, while small, could constitute as many as 24,000
    consumers29 who would have no valid claim against the defendants
    under the state antitrust laws even if the named plaintiffs win on
    the merits.
    The majority correctly recognizes that certification of
    a class that includes uninjured consumers hinges on there being a
    method of identifying and removing those consumers prior to entry
    of judgment, and that any such method must be both administratively
    feasible and protective of the defendants' Seventh Amendment and
    due process rights.      Slip Op. at 17-18.     The majority also
    correctly recognizes that the district court has not identified--
    much less rigorously analyzed--any method for identifying and
    excluding these thousands of consumers prior to entry of judgment.
    Slip Op. at 18-19.   Rather, the district court certified the class
    29
    Neither side has precisely defined the size of the class,
    but the defendants, without challenge, suggest that it includes
    over a million consumers. Appellants' Br. at 20 (noting that 7.8%
    to 9.8% of the consumers in the class would constitute a group of
    over 100,000, meaning that the class would number more than a
    million). The majority's careful analysis suggests, in turn, that
    the percentage of uninjured consumers may be comparable to the 2.4%
    in Messner v. Northshore University Healthsystem, 
    669 F.3d 802
    , 826
    (7th Cir. 2012).    In a putative class including over a million
    consumers, that's at least 24,000 people.
    -49-
    because it considered the Rule 23 predominance inquiry satisfied by
    the fact that the vast majority of consumers in the class had been
    injured.       As for the uninjured, the court simply kicked the can
    down the road by noting that the court "preserve[d] the Defendants'
    right to challenge individual damage claims at trial."                         In re
    Nexium (Esomeprazole) Antitrust Litig., 
    297 F.R.D. 168
    , 179 (2013).
    The path thus marked for our court is clear.               We should
    vacate    the    order    certifying     a   class   that      includes   uninjured
    consumers,      and    remand   to     the   district    court    to    proceed     in
    accordance with the principles set forth in the majority's opinion.
    To the extent that certification remains relevant, given the
    posture    of    the   case,    the    possibility      would    remain   that      the
    plaintiffs might yet propose and the district court approve some
    method    of    culling    uninjured     consumers      from    the    class   in   an
    administratively feasible manner that protects defendants' rights.
    Instead, the majority dons the hats of both plaintiffs' counsel and
    the district court by first proposing, sua sponte, a culling method
    that no party has proposed--limiting recovery to consumers who file
    affidavits--and then announcing itself quite satisfied with that
    method.    Slip Op. at 20.            I therefore respectfully dissent.             By
    upholding the district court on the basis of a culling method that
    it itself has fashioned, the majority errs both on the merits and
    as a matter of appellate procedure.
    -50-
    First, on the merits of the majority's proposed culling
    method, at least one sister circuit has twice noted the limitations
    of using affidavits in the manner proposed by the majority.               See
    Carrera v. Bayer Corp., 
    727 F.3d 300
    , 304, 307 (3d Cir. 2013)
    (remanding an order certifying a class of all purchasers of a
    weight-loss     supplement   in   Florida   where   documentary   proof   of
    purchase was "unlikely" and noting that the method of ascertaining
    whether someone is in the class must be "administratively feasible"
    and that affidavits of purchase are not sufficient); Marcus v. BMW
    of N. Am., LLC, 
    687 F.3d 583
    , 594 (3d Cir. 2012) (remanding a class
    certification order on the grounds that a class of original
    purchasers of BMWs with run-flat tires during the class period was
    not   readily    ascertainable    via   a   "reliable,   administratively
    feasible" method, and cautioning against including class members
    based on mere affidavits that their tires had gone flat).
    The majority's response to the persuasive force of this
    precedent is fashioned out of a vacuum. The majority cites Madison
    v. Chalmette Refining, LLC, 
    637 F.3d 551
    , 556 (5th Cir. 2011), a
    case that both makes no mention of affidavits and actually reverses
    a class certification order because the district court failed to
    analyze in detail how individual issues would be resolved at trial,
    and instead took a "figure-it-out-as-we-go-along approach."30             637
    30
    The majority gleans a potential blessing of affidavits from
    Chalmette by noting that among the criticisms of the district court
    by the Fifth Circuit was the failure to consider use of a so-called
    -51-
    F.3d at 557 (quoting Robinson v. Texas Auto. Dealers Ass'n, 
    387 F.3d 416
    , 426 (5th Cir. 2004)).
    But regardless of whether or not affidavits may have a
    role to play in this or any class action, the larger issue is that
    a court of appeals should not assume that Rule 23 has been
    satisfied on the basis of a culling method that it itself has
    proposed.    Many circuit court judges have little to no substantial
    experience   with   the   nuts    and   bolts   of   class   litigation,   so
    fashioning    litigation    management      devices     is    not   in     our
    institutional wheelhouse.        Many of the facts relevant to assessing
    whether a certain management procedure will achieve a certain
    objective will not be discernible by a court until one party
    proposes it, and the other has a chance to critique it.             At that
    "Lone Pine" order, a device used in mass accident litigation to
    streamline a case. Lore v. Lone Pine Corp., No. L-33606-85, 
    1986 WL 637507
    (N.J. Super. Ct. Law Div. Nov. 18, 1986). A Lone Pine
    order, in turn, can include a requirement that those willing to sue
    first produce "some evidence to support a credible claim," which
    may include affidavits from a physician or real estate appraiser as
    evidence of injury. See Steering Comm. v. Exxon Mobil Corp., 
    461 F.3d 598
    , 604 n.2 (5th Cir. 2006). Lone Pine orders are for mass
    accident cases, which the drafters of Rule 23(b)(3) recognized are
    generally not certifiable. Fed. R. Civ. P. 23 advisory committee's
    note to subdiv. (b)(3) (1966) ("A 'mass accident' resulting in
    injuries to numerous persons is ordinarily not appropriate for a
    class action because of the likelihood that significant questions,
    not only of damages but of liability and defenses to liability,
    would be present, affecting the individuals in different ways.").
    So while a court might consider how a trial might be held in a mass
    accident case with use of a Lone Pine order, and by potentially
    requiring affidavits, nothing in Chalmette remotely suggests that
    affidavits would suffice as an administratively feasible tool for
    establishing injury in a manner protective of defendant's jury
    trial rights.
    -52-
    point, the district court would usually weigh the pros and cons of
    the procedure and make a decision, employing the fair amount of
    discretion assigned to it.      We, in turn, come along at or near the
    end of the process.      And we are pretty good at explaining the
    principles that cabin the district court's exercise of discretion,
    and at analyzing what by that point have usually become stationary
    targets presented in competing briefs.
    The majority's opinion, in contrast, skips all that.         It
    simply assumes that the question of how uninjured consumers can be
    identified    and   excluded   can   be     answered   with   affidavits.31
    Untested by the adversary system, unexamined by any trial judge,
    and fashioned without awareness of its fit to the parties' needs
    and goals, the majority's method raises more questions than it
    answers. Will it require two forms of notice to class members--one
    to TPPs and one to consumers?        What happens to those consumers who
    do not return an affidavit (of whom there may be many, given the
    low dollar amount of any potential recovery)?           Will they be deemed
    to have opted out of the class?           Or will they be deemed to have
    31
    The majority also toys with the idea that courts could
    create a presumption that a consumer would buy a generic if it was
    available.   Even assuming we could do so in a federal question
    case, but see 28 U.S.C. § 2072(b) (prohibiting the use of any
    procedural device to "abridge, enlarge, or modify any substantive
    right"), given that indirect purchasers cannot sustain an antitrust
    claim under federal law, see Illinois Brick Co. v. Illinois, 
    431 U.S. 720
    , 746-48 (1977), the only time such a presumption could be
    employed is in a state-law diversity suit where a federal court is
    without authority to create such a presumption. See Erie R. Co. v.
    Tompkins, 
    304 U.S. 64
    , 78 (1938).
    -53-
    remained in, but lost their claims due to lack of injury?       Even
    more daunting, what happens if tens or hundreds of thousands of
    Nexium purchasers file affidavits?      How exactly will defendants
    exercise their acknowledged right to "challenge individual damage
    claims at trial"?   Will the defendants seek to depose everyone who
    has returned an affidavit, effectively challenging plaintiffs'
    counsel to a discovery game of chicken? The majority simply hedges
    on these questions by assuming--without any basis at all, and
    likely unreasonably--that the affidavits will be "unrefuted."
    Throwing up an idea to see if it might stick is just not
    what courts of appeals do best.        Rather, it is only after the
    adversaries have gone to the mat and the dust has settled that we
    can fairly review a district court's assessment of whether a
    proposed method would be feasible.         For this reason, if the
    district court does not identify a culling method to ensure that
    the class, by judgment, includes only members who were actually
    injured, this court has no business simply hoping that one will
    work.   See Gen. Tel. Co. of the Sw. v. Falcon,   
    457 U.S. 147
    , 160
    (1982) (noting that "actual, not presumed, conformance" with the
    rule is "indispensable"); In re New Motor Vehicles Can. Exp.
    Antitrust Litig., 
    522 F.3d 6
    , 28 (1st Cir. 2008) (requiring the
    district court to evaluate a proposed model for proving fact of
    injury prior to certification).    In this important respect, any
    attempt to reconcile the majority's holding with the approach taken
    -54-
    by our circuit in New Motor Vehicles will result in hopeless
    confusion unless one concludes that the dissent in New Motor
    Vehicles has become the law without en banc review.
    On a related note, I must also part company with the
    majority's dalliance with a percentage-based rule inspired by the
    Seventh Circuit's decision in Messner v. Northshore University
    Healthsystem, 
    669 F.3d 802
    , 826 (7th Cir. 2012).            The majority
    quite rightly says that the test for determining whether the
    inclusion     of   uninjured   class   members     should   defeat   class
    certification is "functional."         Slip Op. at 44.       But then it
    backslides:    it notes that a 2.4% decrease in the size of the class
    due to the removal of uninjured members was not so large as to
    defeat certification in 
    Messner, 669 F.3d at 824
    , and concludes
    that the number of uninjured members here "seems comparable" to the
    number in Messner.     Slip Op. at 46.
    If 2.4% is okay, why not 5.7%?       Or any number under 50%?
    The percentage tells one almost nothing about the functional
    sufficiency of the method.         The relevant inquiry for a court
    considering certifying a class that includes uninjured members is
    whether the court will be able to feasibly cull out those members
    before entry of judgment.      It may be relatively easy to cull 5% out
    of a class of 30.     Culling out 5% of 1 million is almost certainly
    not.   Here, "just 2.4%" is likely to be at least 24,000 people.
    Moreover, nobody knows who the 24,000 are.        So the culling process
    -55-
    may need to review individually all the affidavits of class members
    who return them.      How this is feasible, the majority does not
    explain.32
    I also take issue with the majority's suggestion that
    when a proposed class includes some uninjured members who will have
    to be removed post-certification, it is the defendants who bear the
    burden of demonstrating that it cannot be done.    The Supreme Court
    has been clear that the party seeking certification bears the
    burden of demonstrating that the requirements of Rule 23 are
    satisfied.     Wal-Mart Stores, Inc. v. Dukes, 
    131 S. Ct. 2541
    , 2551
    (2011).      So, too, has this circuit.   Smilow v. Sw. Bell Mobile
    Systems, Inc., 
    323 F.3d 32
    , 38 (1st Cir. 2003).
    The majority acknowledges this, Slip Op. at 14, 34, and
    yet goes on to suggest the opposite:        "Defendants have merely
    speculated that a mechanism for exclusion cannot be developed
    later.    This is not enough to overcome plaintiffs' case for having
    met the requirements of Rule 23."    Slip Op. at 21.   But plaintiffs
    have not met their burden because, as the majority acknowledges,
    the proposed class includes some number of uninjured members, Slip
    Op. at 42, and the plaintiffs have not explained how they will be
    32
    Oddly, the majority avoids any discussion of how affidavits
    will, as a practical matter, affect trial, even while citing Vega
    v. T-Mobile USA, Inc., 
    564 F.3d 1256
    , 1270 (11th Cir. 2009) for the
    proposition that there is no predominance when the addition or
    subtraction of class members has a substantial effect on the
    quantity of the evidence offered. See Slip Op. at 44.
    -56-
    removed before judgment,   Slip Op. at 18-19.   (It is also notable
    that the majority felt compelled to propose a culling method sua
    sponte--if the plaintiffs had indeed met their burden, this step
    would not be necessary.)   When the plaintiffs have only shown that
    the number of uninjured members is relatively small, the class
    still cannot satisfy Rule 23 unless there exists a method for
    excluding those uninjured members prior to judgment.     In such a
    context, it is no more the defendants' burden to prove that this
    cannot be done than it is this court's job to come up with a way
    that it can. Cf. Wallace B. Roderick Revocable Living Trust v. XTO
    Energy, Inc., 
    725 F.3d 1213
    , 1218 (10th Cir. 2013) (vacating a
    certification order in part because the district court appeared to
    shift the burden to the defendant to prove lack of commonality).
    Finally, it bears noting that in the time that this
    interlocutory appeal was pending, the district court tried most of
    the liability issues in this case, leaving the end payors' fact-of-
    injury for a future proceeding.        That trial concluded with a
    defense verdict just as these opinions were about to issue.     The
    district court solicited no affidavits from consumers, nor does it
    appear that there was a plan to do so.    So even if the majority's
    proposed culling method were tenable, we know that the district
    court did not employ it.       In short, the majority affirms a
    certification order based entirely on a fiction that we know to be
    false.   And unless one-way intervention is allowed, but see Am.
    -57-
    Pipe & Constr. Co. v. Utah, 
    414 U.S. 538
    , 546-49 (1974) (discussing
    the history and application of the one-way intervention rule), it
    is likely too late to let class members self-identify after taking
    a peek at the verdict.
    These changing facts on the ground warrant caution before
    affirming a class certification order based on a possibility that
    the district court might do something that it did not do, and which
    it is likely that it could not do.      Will there be an appeal from
    the verdict that will succeed?   Is there any plan to send notice?33
    Is the basis for interlocutory review now eliminated?     Although I
    agree entirely with the key principle that serves as the predicate
    for the majority's opinion--that certification of a class that
    includes uninjured members is possible if the district court
    identifies a feasible method for culling those members prior to
    entry of judgment in a way that protects defendants' rights--I do
    not believe that the majority has properly applied that principle
    in this case.   I respectfully dissent.
    33
    This is a Rule 23(b)(3) action in which notice to class
    members is mandatory. Fed. R. Civ. P. 23(c)(2)(B).
    -58-
    

Document Info

Docket Number: 14-1522

Filed Date: 1/22/2015

Precedential Status: Precedential

Modified Date: 1/22/2015

Authorities (39)

In Re New Motor Vehicles Can. Export Anti. Lit. , 522 F.3d 6 ( 2008 )

Tardiff v. Knox County , 365 F.3d 1 ( 2004 )

Smilow v. Southwestern Bell Mobile Systems, Inc. , 323 F.3d 32 ( 2003 )

Gintis v. Bouchard Transportation Co. , 596 F.3d 64 ( 2010 )

Vega v. T-MOBILE USA, INC. , 564 F.3d 1256 ( 2009 )

DG Ex Rel. Stricklin v. DeVaughn , 594 F.3d 1188 ( 2010 )

In Re: 1994 Exxon , 461 F.3d 598 ( 2006 )

Madison Ex Rel. Hebert v. Chalmette Refining, L.L.C. , 637 F.3d 551 ( 2011 )

Teamsters Local 445 Freight Division Pension Fund v. ... , 546 F.3d 196 ( 2008 )

Robinson v. Texas Automobile Dealers Ass'n , 387 F.3d 416 ( 2004 )

Cordes & Co. Financial Services v. A.G. Edwards & Sons, Inc. , 502 F.3d 91 ( 2007 )

Bell Atlantic Corp. v. AT&T Corp. , 339 F.3d 294 ( 2003 )

Mims v. Stewart Title Guaranty Co. , 590 F.3d 298 ( 2009 )

in-re-the-prudential-insurance-company-of-america-sales-practices , 148 F.3d 283 ( 1998 )

Stearns v. Ticketmaster Corp. , 655 F.3d 1013 ( 2011 )

Hunt v. Imperial Merchant Services, Inc. , 560 F.3d 1137 ( 2009 )

Paper Systems Incorporated, Graphic Controls Corp., and ... , 281 F.3d 629 ( 2002 )

Lynne A. Carnegie, on Behalf of Herself and All Others ... , 376 F.3d 656 ( 2004 )

Kohen v. Pacific Investment Management Co. , 571 F.3d 672 ( 2009 )

Pella Corp. v. Saltzman , 606 F.3d 391 ( 2010 )

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