Rail Freight Fuel Surcharge v. , 934 F.3d 619 ( 2019 )


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    AnUcb $ttt ffnurI of                         ppitl
    FOR THE DISTRICT OF COLUMBIA CIRCUIT
    Argued September 28, 201$             Decided August 16, 2019
    No. 18-7010
    IN RE: RAIL FREIGHT FUEL SURCHARGE ANTITRUST
    LITIGATION   -   MDL No. 1 $69,
    DAKOTA GRANITE COMPANY, ON BEHALF OF ITSELF AND ALL
    OTHERS SIMILARLY SITUATED, ET AL.,
    APPELLANTS
    V.
    BNSF RAILWAY COMPANY,         ET AL.,
    APPELLEES
    Appeal from the United States District Court
    for the District of Columbia
    (No. 1 :07-mc-00489)
    Kathleen M Sullivan argued the cause for appellants.
    With her on the briefs were Stephen R. Neuwirth, Sami H
    Rashid, Michael D. Hausfeld, and Michael?. Lehmann.
    Carter G. Phillips argued the cause for appellees. With
    him on the brief were Joseph R. Guerra, Kathleen Moriarty
    Mueller, Saul?. Morgenstern, Thomas A. Isaacson, John li
    Nannes, Tara L. Reinhart, J Scott Ballenger, Veronica S.
    Lewis, Samuel M Sipe, Jr., Linda S. Stein, Andrew S.
    Tulumello, Lucas C. Townsend, and Kent A. Gardiner.
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    Anton Metlitsky and Warren D. Postman were on the brief
    for amicus curiae Chamber of Commerce of the United States
    of America in support of defendants-appellees.
    Before: GARLAND, ChiefJudge, and ROGERS and KATSAS,
    Circuit Judges.
    Opinion for the Court filed by Circuit Judge   KATSAS.
    KATSAS, Circuit Judge:’ This case involves a putative
    class of over 16,000 shippers allegedly harmed by a price-
    fixing conspiracy among the nation’s largest freight railroads.
    The district court denied class certification because the
    plaintiffs’ regression analysis—their evidence for proving
    causation, injury, and damages on a class-wide basis—
    measured negative damages for over 2,000 members of the
    proposed class. Based on that consideration, we affirm.
    I
    This appeal arises out of eighteen antitrust actions
    consolidated by the Multidistrict Litigation Panel.        The
    defendants are the four largest freight railroads in the United
    States: BNSF Railway Company; CSX Transportation, Inc.;
    Norfolk Southern Railway Company; and Union Pacific
    Railroad Company. The plaintiffs, who are their customers,
    allege that the railroads conspired to fix rate-based fuel
    surcharges. Railroads impose fuel surcharges—additional
    charges above the base shipping price—when the price of fuel
    rises above a certain trigger price. Rate-based surcharges are
    calculated as a percentage of the base shipping price.
    NOTE: Portions of this opinion contain Sealed Information,
    which has been redacted.
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    Following consolidation, the action was divided into one
    case involving direct purchasers and another involving indirect
    purchasers. All plaintiffs alleged that the railroads violated
    section 1 of the Sherman Act, 15 U.S.C. § 1, by conspiring to
    fix prices. The direct purchasers sought treble damages under
    section 4 of the clayton Act, 15 U.S.C. § 15, and the district
    court held that they stated a claim, In re Rail Freight Surcharge
    AntitrustLitig., 
    587 F. Supp. 2d
    27(D.D.c. 2008). The indirect
    purchasers sought injunctive relief under section 16 of the
    Clayton Act, 15 U.S.C. § 26, and raised various state-law
    claims. The district court held that the state claims were
    preempted by federal law, but it declined to dismiss the federal
    claims. In re Rail Freight Surcharge Antitrust Litig., 593 F.
    Supp. 2d 29 (D.D.C. 2008), afT d, Fayus Enters. v. BNSF Ry.
    Co., 
    602 F.3d 444
    (D.C. Cir. 2010).
    The eight named plaintiffs in the direct-purchaser case—
    Carter Distributing Company; Dakota Granite Company;
    Donnelly Commodities, Inc.; Dust Pro, Inc.; Nyrstar Taylor
    Chemicals, Inc.; Olin Corporation; Strates Shows, Inc.; and US
    Magnesium LLC—rnoved to certify a class under Federal Rule
    of Civil Procedure 23(b)(3). The proposed class consisted of
    all shippers who paid rate-based fuel surcharges for
    unregulated services purchased from the defendants between
    July 1,2003 and December 31, 2008. To show that causation,
    injury, and damages could be proved on a class-wide basis, the
    plaintiffs invoked two regression models constructed by their
    economist, Dr. Gordon Rausser. The “common factor model”
    identified seven variables said to determine the price of the
    defendants’ services, including fuel surcharges. The “damages
    model,” controlling for those variables, sought to isolate price
    increases attributable to the alleged conspiracy. The railroads
    criticized these models on various grounds, including that they
    measured damages for shipments made under legacy contracts
    fixed before any conspiracy allegedly began.
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    The district court initially certified the class. It noted that
    if individualized proof were necessary to establish causation
    and injury, then the plaintiffs could not satisfy the Rule
    23(b)(3) requirement that common questions predominate. See
    In re Rail Freight Fuel Surcharge Antitrust Litig., 
    287 F.R.D. 1
    , 43 (D.D.C. 2012). But the court found Dr. Rausser’s
    regression analysis to be “plausible” and “workable,” so it
    concluded that causation, injury, and damages were
    “susceptible to proof at trial through evidence common to the
    class.” 
    Id. at 67.
    The court rejected many different criticisms
    of the regression models, but it did not specifically address the
    question of false positives for legacy contracts.
    On interlocutory review, we vacated the certification order
    and remanded for reconsideration in light of Comcast Corp. V.
    Behrend, 
    569 U.S. 27
    (2013). In re Rail Freight Surcharge
    AntitrustLitig.—MDLNo. 1869, 
    725 F.3d 244
    (D.C. Cir. 2013)
    (Rail Freight 1). We explained that, for an antitrust class
    action, common questions “cannot predominate where there
    exists no reliable means of proving classwide injury in fact.”
    
    Id. at 253.
    We expressed concern with the district court’s
    failure to address “the damages model’s propensity toward
    false positives,” which left us with no way of knowing whether
    “the overcharges the damages model calculates for class
    members [are] any more accurate than the obviously false
    estimates it produces for legacy shippers.” 
    Id. at 254.
    Finally,
    we stressed that Rule 23, as construed in Comcast, requires a
    “hard look at the soundness of statistical models that purport to
    show predominance.” 
    Id. at 255.
    On remand, after permitting supplemental discovery and
    expert reports, the district court denied class certification. In
    re Rail Freight Surcharge Antitrust Litig., 
    292 F. Supp. 3d 14
    (D.D.C. 2017) (Rail Freight If). The court concluded that Dr.
    Rausser’s expert opinions were reliable enough to be
    admissible at trial.      
    Id. at 49—63.
          But in assessing
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    predominance, the court identified three shortcomings in his
    damages model: first, it measured highly inflated damages for
    intermodal traffic (i.e., shipments traveling by rail and another
    mode of transportation such as trucks or airplanes), 
    Id. at 122—
    26; second, as we had noted in the earlier appeal, the model
    erroneously measured damages for shipments made under
    legacy contracts, 
    Id. at 126—31;
    and third, the model measured
    negative damages—and hence no injury—for over 2,000
    members of the proposed class, 
    id. at 132—41.
    The court
    concluded that any one of these problems was enough to defeat
    the plaintiffs’ argument for predominance. 
    Id. at 122.
    The plaintiffs filed a petition for permission to appeal the
    class-certification decision under Federal Rule of Civil
    Procedure 23(f). A motions panel of this Court granted the
    petition without prejudice to reconsideration at the merits
    stage. In re Rail freight fuel Surcharge Antitrust Litig.—MDL
    No. 1869, No. 17-8005 (D.C. Cir. Dec. 20, 2017).
    II
    We begin with the question of our jurisdiction. Orders
    denying class certification are neither final decisions under 28
    U.S.C. § 1291, Coopers & Lybrand v. Livesay, 
    437 U.S. 463
    (1978), nor injunctions immediately appealable under 28
    U.S.C. § 1292(a)(l), Gardner v. Westinghouse Broad Co., 
    437 U.S. 478
    (1978). However, 28 U.S.C. § 1292(e) permits the
    Supreme Court to promulgate rules creating new categories of
    decisions appealable before final judgment. Exercising that
    authority, the Court has provided that “[a] court of appeals may
    permit an appeal from an order granting or denying class-action
    certification,” if a “petition for permission to appeal” is timely
    filed. Fed. R. Civ. P. 23(f).
    In this case, the plaintiffs filed a timely petition for
    permission to appeal, which was enough under Rule 23(f) to
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    secure our jurisdiction. That jurisdiction is “discretionary,”
    Rail freight 
    I, 725 F.3d at 250
    , and the railroads contest
    whether we should exercise it. But their argument on this point
    is perfunctory—less than one page of briefing, with no case
    citations—and it almost entirely duplicates their merits
    arguments. According to the railroads, we should conclude
    that the denial of class certification was correct. Then, we
    should dismiss the appeal as raising neither a questionable
    decision nor an unsettled issue—considerations that bear on
    whether to permit the appeal in the first place, see 
    id. at 250—
    54. Because that disposition would make little sense at this
    juncture, we decline to revisit the motions panel’s decision
    accepting the appeal.
    III
    Federal Rule of Civil Procedure 23 sets forth various
    requirements for the certification of class actions. Rule 23(a)
    provides four “prerequisites” for any class certification,
    including that there must be “questions of law or fact common
    to the class.” If these prerequisites are met, Rule 23(b)(3)
    permits certification if, among other things, “questions of law
    or fact common to class members predominate over any
    questions affecting only individual members.” For purposes of
    these rules, a “common” question is one that is “capable of
    classwide resolution—which means that determination of its
    truth or falsity will resolve an issue that is central to the validity
    of each one of the claims in one stroke.” Wal-Mart Stores, Inc.
    v. Dukes, 
    564 U.S. 338
    , 350 (2011).                 In contrast, an
    “individual” question is one for which “members of a proposed
    class will need to present evidence that varies from member to
    member.” Tyson Foods, Inc. v. Bouaphakeo, 
    136 S. Ct. 1036
    ,
    1045 (2016) (quotation marks omitted).
    The party seeking class certification “must affirmatively
    demonstrate” that the commonality and predominance
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    requirements are satisfied. 
    Wal-Mart, 564 U.S. at 350
    . This
    requires a “rigorous analysis” that often will “overlap with the
    merits.” 
    Id. at 351
    (quotation marks omitted). Three recent
    cases address the contours of this analysis. In Wal-Mart, the
    Supreme Court ordered decertification of a Title VII class
    where the plaintiffs presented insufficient proof that the
    defendant had engaged in a general policy of sex
    discrimination. 
    Id. at 352—55.
    In Corncast, the Court ordered
    decertification where the regression analysis used to show
    common injury did not track the underlying theory of 
    liability. 569 U.S. at 36
    —38. The Court rejected a contention that, at the
    class-certification stage, “any method of measurement is
    acceptable so long as it can be applied classwide, no matter
    how arbitrary the measurements may be.” 
    Id. at 36.
    But in
    Tyson foods, the Court held that concerns about the validity of
    a statistical sample used to prove class-wide averages—which
    the Court described as presenting a common objection to the
    claims of each class member—should be addressed “as a
    matter of summary judgment, not class certification.” 136 5.
    Ct. at 1047 (quotation marks omitted).
    IV
    The direct-purchaser plaintiffs raise claims under section
    4 of the Clayton Act, which provides treble damages to any
    person “injured in his business or property by reason of
    anything forbidden in the antitrust laws.” 15 U.S.C. § 15(a).
    To establish liability under section 4, each plaintiff must prove
    not only an antitrust violation, but also an injury to its business
    or property and a causal relation between the two. Without
    common proof of injury and causation, section 4 plaintiffs
    cannot establish predominance. See, e.g., 
    Comcast, 569 U.S. at 36
    —38; Rail freight 
    I, 725 F.3d at 252
    —53.
    The parties dispute the extent to which a court, in
    conducting the “hard look” required by Rule 23, should assess
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    the reliability of common evidence. Specifically, they contest
    whether Rule 23 requires reliability above and beyond what is
    necessary to establish the admissibility of expert testimony
    under Federal Rule of Evidence 702 and Daubert v. Merrell
    Dow Pharmaceuticals, Inc., 
    509 U.S. 579
    (1993). That
    question arose because the district court found Dr. Rausser’s
    regression models to be reliable for admissibility purposes,
    Rail freight 
    II, 292 F. Supp. 3d at 54
    —63; held that “reliability
    under Rule 23 is a higher standard than reliability under
    Daubert,” 
    id. at 91;
    and found no predominance based on
    concerns that “undermine[d] the reliability of Dr. Rausser’s
    damages model,” 
    id. at 122.
    The defendants embrace this
    reasoning; they argue that Wal-Mart and Comcast rejected
    certification based on concerns that common evidence was
    unreliable, even though its admissibility was uncontested. The
    plaintiffs disagree; they contend that predominance ultimately
    turns on whether the relevant evidence is common or
    individualized, and they read Tyson foods as holding that a
    court may assess its reliability only in deciding admissibility or
    summary judgment.
    We need not resolve this dispute because Dr. Rausser’s
    damages model, even if sufficiently reliable, does not prove
    classwide injury. As the district court explained, his model
    indicates that the proposed class consists of 16,065 shippers.
    Rail freight II, 292 F. $upp. 3d at 136. The plaintiffs maintain
    that the alleged conspiracy injured every one of them. Yet the
    damages model also indicates that 2,037 members of the
    proposed class—or 12.7 percent—suffered “only negative
    overcharges” and thus no injury from any conspiracy. 
    Id. at 137.
    So even assuming the model can reliably show injury and
    causation for 87.3 percent of the class, that still leaves the
    plaintiffs with no common proof of those essential elements of
    liability for the remaining 12.7 percent. The district court held
    that the need for “individualized inquiries to determine which
    of at least 2,037 (and possibly more) class members were
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    actually injured by the alleged conspiracy,” 
    Id. at 140,
    precluded a finding of predominance. 
    Id. at 122.
    We review a
    district court’s assessment of predominance only for abuse of
    discretion. Garcia v. Johanns, 
    444 F.3d 625
    , 631 (D.C. Cir.
    2006). Here, we find no such abuse.
    The plaintiffs argue that their model measures these
    negative damages only because of normal prediction error. The
    district court found that prediction error could not “account for
    all—or even a substantial portion of—the 2,037 shippers that
    the model shows to be uninjured.” Rail Freight II, 
    292 F. Supp. 3d
    at 139. The plaintiffs take issue with that finding, but it is
    not clearly erroneous. In any event, the plaintiffs’ argument
    about prediction error at most suggests that their damages
    model might falsely have measured no injury for as many as
    2,037 shippers. This line of reasoning describes a possible
    problem with their own evidence; it does not point to
    affirmative evidence—much less common affirmative
    evidence—that a conspiracy did in fact injure these shippers.
    The plaintiffs further argue that predominance does not
    require common evidence extending to all class members.
    That contention appears inconsistent with our statement in Rail
    freight I that the plaintiffs, to establish predominance, must
    “show that they can prove, through common evidence, that all
    class members were in fact injured by the alleged 
    conspiracy.” 725 F.3d at 252
    ; see also 
    id. (“we do
    expect the common
    evidence to show all class members suffered some injury”).
    Despite these statements, the district court held that our opinion
    did not require common evidence of injury to all class
    members. See Rail Freight II, 
    292 F. Supp. 3d
    at 132—34.
    Instead, it agreed with the plaintiffs that common proof
    covering “virtually all” members of the proposed class, and
    leaving only a “de minimis” number of cases requiring
    individualized proof of injury and causation, would be enough
    to show predominance. 
    Id. at 135.
    For the sake of argument,
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    we assume that the district court correctly recognized a de
    minimis exception to the general rule that, for claims under
    section 4 of the Clayton Act, causation and injury must be
    “capable of classwide resolution,” 
    Wal-Mart, 564 U.S. at 350
    .
    The court reasonably concluded that such a de minimis
    exception would not encompass this case.
    In assessing how many individual adjudications are too
    many, both the district court and the parties invoke cases
    addressing the question of when, if ever, a class may include
    concededly uninjured members. Strictly speaking, this case
    does not present that question, for the plaintiffs here insist that
    each member of the proposed class was injured. Nonetheless,
    the cited cases bear some similarity to this one: Uninjured class
    members cannot prevail on the merits, so their claims must be
    winnowed away as part of the liability determination. And that
    prospect raises the same kind of question at issue here—when
    does the need for individualized proof of injury and causation
    destroy predominance? See, e.g., In re Asacol Antitrust Litig.,
    
    907 F.3d 42
    , 51—58 (1st Cir. 2018); In re Nexium Antitrust
    Litig., 
    777 F.3d 9
    , 18—22 (1st Cir. 2015).
    The plaintiffs complain that the district court arbitrarily
    imposed a six-percent upper limit on the percentage of
    uninjured parties who may be included in a certified class. In
    fact, the court’s analysis was more nuanced. As the court
    explained, the “few reported decisions” involving uninjured
    class members “suggest that 5% to 6% constitutes the outer
    limits of a de minimis number.” Rail Freight ll 
    292 F. Supp. 3d
    at 137. The 12.7 percent figure in this case is more than
    twice that approximate upper bound reflected in analogous
    caselaw. Moreover, the district court considered raw numbers
    as well as percentages: six percent of a “class totaling only
    fifty-five” members might be de minimis, but 12.7 percent of
    this class yields “2,037 uninjured class members” (according
    to the common proof), all of whom would need individualized
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    adjudications of causation and injury. 
    Id. at 137—38.
    Finally,
    the district court stressed that the plaintiffs have proposed no
    “further way”—short of full-blown, individual trials—”to
    reduce this number and segregate the uninjured from the truly
    injured.” 
    Id. at 138.
    None of this was an abuse of discretion.
    The absence of any winnowing mechanism sharply
    distinguishes Nexiurn, the plaintiffs’ best case. There, the class
    included purchasers of a drug allegedly shielded from
    competition by the unlawful suppression of a generic
    
    alternative. 777 F.3d at 13
    —14. The problem of uninjured class
    members arose because a small percentage of the class, due to
    brand loyalty, would have purchased the drug even if a less
    expensive generic alternative had been available. 
    Id. at 19—20.
    The First Circuit held that the uninjured class members could
    manageably be winnowed by having individual consumers file
    minimal, likely unrebutted affidavit testimony indicating
    whether, if given the choice, they would have purchased the
    branded drug or a generic alternative. 
    Id. at 20—21.
    Nexium does not support class certification here. For one
    thing, the First Circuit sharply limited that decision in Asacol.
    There, the Court explained that any winnowing mechanism
    must be truncated enough to ensure that the common issues
    predominate, yet robust enough to preserve the defendants’
    Seventh Amendment and due process rights to contest every
    element of liability and to present every colorable 
    defense. 907 F.3d at 5
    1—54. Moreover, the Court held that Nexium’s
    affidavit mechanism could not satisfy both conditions where
    the defendant seeks to contest the question whether individual
    class members would have shifted from the branded drug to a
    less expensive generic alternative. See 
    Id. That would
    require
    individual trials because genuinely contested affidavits do not
    support summary judgment and are inadmissible. 
    Id. Here, the
    defendants intend to contest whether any of the 2,037 shippers
    suffered injury as a result of any conspiracy. And the question
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    presented in these individual challenges—regarding impacts
    on shippers of different sizes, shipping different products in
    different geographic markets, with different transportation
    options and different degrees of leverage—would be far more
    complex than the single unitary question (branded or generic?)
    at issue in Nexium and Asacol.
    The plaintiffs also invoke the Supreme Court’s discussion
    of uninjured class members in Tyson foods. The defendants
    there sought review of the question whether a certified class
    may contain any uninjured members. But the Supreme Court
    reserved that question, 136 5. Ct. at 1049, and the district court
    here decided it in the plaintiffs’ favor, Rail Freight II, 292 F.
    Supp. 3d at 133—35. So, this aspect of Tyson foods does not
    advance the plaintiffs’ appeal. The Supreme Court also
    addressed a further ‘new argument” raised for the first time in
    merits briefing—that plaintiffs at the certification stage must
    prove that all class members were injured or establish a
    manageable process for culling out uninjured class members.
    136 5. Ct. at 1049. The Court held that this argument was
    “premature” because the parties disagreed about what culling
    mechanisms might be available and the district court had not
    yet addressed the question. See 136 5. Ct. at 1050. This
    holding rested on the inappropriateness of raising new issues
    for the first time in Supreme Court merits briefing. See 
    id. It does
    not, as the plaintiffs here contend, perniit district courts
    considering class certification to defer questions about the
    number and nature of any individualized inquiries that might
    be necessary to establish liability. To the contrary, confronting
    such questions is part-and-parcel of the “hard look” required
    by Wal-Mart and Comcast, as recognized even by those courts
    permitting a class to include some small number of concededly
    uninjured individuals. See, e.g., In re 
    Asacol, 907 F.3d at 51
    —
    54; In re Nexiurn,777 F.3d at 19—2 1.
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    1—,
    1.)
    Finally, the plaintiffs argue that the 2,037 class members
    for whom their damages model shows no injury are a de
    minimis portion of the class because their shipments make up
    less than one percent of the railroads’ overall revenue from the
    alleged conspiracy. But revenue is irrelevant to predominance,
    which looks to whether elements such as causation and injury
    may be proved through common evidence, not how much the
    defendants benefited from any wrongdoing.
    V
    Looking beyond Dr. Rausser’s regression analysis, the
    plaintiffs point to other evidence that they say can prove injury
    and causation on a class-wide basis. In Rail freight I, we
    concluded that Dr. Rausser’s analysis was “essential” to the
    plaintiffs’ case for certification: “No damages model, no
    predominance, no class 
    certification.” 725 F.3d at 253
    . The
    district court reached the same conclusion on remand, after
    careful review of all the documentary and expert evidence.
    This was not an abuse of discretion.
    The plaintiffs invoke documentary evidence that the
    defendants enforced fuel surcharges “uniformly and with few
    exceptions.” Rail Freight II, 292 F. $upp. 3d at 122; see 
    id. at 103—07.
    But imposing fuel surcharges does not show injury
    caused by a conspiracy. The parties vigorously dispute
    whether higher overall prices during the class period were
    attributable to causes besides any conspiracy—such as the
    marked increase in fuel prices that occurred around the
    beginning of the class period, see l.A. 65 92—93. As the district
    court explained, Dr. Rausser designed his regression models
    precisely to control for these kinds of potential alternative
    causes, see Rail Freight II, 292 F. $upp. 3d at 101, yet his
    damages model showed that 2,037 shippers were uninjured
    despite paying fuel surcharges. The plaintiffs’ evidence of
    widespread fuel surcharges helps explain why the proposed
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    class is a large one, but it neither proves that the 2,037 shippers
    were injured by the alleged conspiracy nor otherwise compels
    a finding of predominance.
    Next, the plaintiffs invoke the expert testimony of Dr.
    James McClave, who argued that the 2,037 shippers must have
    been harmed by the conspiracy. Dr. McClave reasoned that
    because these shippers made fewer purchases on average, and
    thus had less bargaining power than the rest of the class, they
    must have been more susceptible to injury. Moreover, Dr.
    McClave’s own study concluded that the defendants’ smallest
    customers—roughly              shippers who made only one
    purchase I                                     I—collectively
    paid higher prices than did larger shippers.
    This analysis is not common proof of injury to the 2,037
    shippers. For one thing, of the         shippers studied by Dr.
    McClave, only          were in the class, and Dr. McClave did
    not indicate how many of them were included among the 2,037
    class members for whom Dr. Rausser’s model showed no
    injury. Moreover, evidence that a group of one-time shippers
    may have paid higher prices collectively does not prove that all
    (or almost all) of them were injured individually. And, as the
    district court explained, Dr. McClave did not attempt to
    identify how many of the one-time shippers did in fact pay
    more, let alone which of them were among the 2,037. See Rail
    Freight II, 292 F. $upp. 3d at 139.
    The plaintiffs respond that Dr. McClave’s analysis, even if
    inconclusive, at least suggests that reduced bargaining power
    made the 2,037 shippers more vulnerable to any conspiracy.
    This line of reasoning parallels one rejected by the Supreme
    Court in Wal-Mart. There, an expert opined that Wal-Mart’s
    “strong corporate culture” made it “vulnerable to gender 
    bias.” 564 U.S. at 354
    (quotation marks omitted). The Court found
    this evidence insufficient to prove that injury could be
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    established on a class-wide basis, because the expert could not
    say what percentage of adverse employment decisions were in
    fact caused by bias. 
    Id. The McClave
    study is similarly
    incomplete because, as explained above, it does not attempt to
    identify which of the small shippers, or what percentage of
    them, were in fact harmed by the alleged conspiracy.
    VI
    In Asacol, the First Circuit noted the absence of even a
    single case “allowing, under Rule 23, a trial in which thousands
    of class members 
    testify.” 907 F.3d at 57
    —58. That Court
    declined to create “the first such case.” 
    Id. So do
    we. Given
    the need in this case for at least 2,037 individual determinations
    of injury and causation, the district court did not abuse its
    discretion in denying class certification on the ground that
    common issues do not predominate.
    Affirmed