Rossi v. Standard Roofing Inc (Part II) , 156 F.3d 452 ( 1998 )


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  •                                                                                                                            Opinions of the United
    1998 Decisions                                                                                                             States Court of Appeals
    for the Third Circuit
    9-9-1998
    Rossi v. Standard Roofing Inc (Part II)
    Precedential or Non-Precedential:
    Docket 97-5185
    Follow this and additional works at: http://digitalcommons.law.villanova.edu/thirdcircuit_1998
    Recommended Citation
    "Rossi v. Standard Roofing Inc (Part II)" (1998). 1998 Decisions. Paper 225.
    http://digitalcommons.law.villanova.edu/thirdcircuit_1998/225
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    Volume 2 of 2
    Filed September 9, 1998
    UNITED STATES COURT OF APPEALS
    FOR THE THIRD CIRCUIT
    NO. 97-5185
    JOSEPH ROSSI; ROSSI FLORENCE, CORP.;
    ROSSI ROOFING, INC.,
    Appellants
    v.
    STANDARD ROOFING, INC.; ARZEE ROOFING SUPPLY
    CORP.; GAF CORPORATION; ALLIED ROOFING, INC.;
    SERVISTAR CORP.; ROBERT HIGGINSON; HARDWARE
    WHOLESALERS, INC.; WILLIAM HIGGINSON;
    CERTAINTEED CORP.; WOLVERINE CORP.; NAILITE
    CORP.; ESTATE OF ROBERT HIGGINSON; AL ROTH;
    CARY ROTH; JOSEPH LICCIARDELLO; WOOD FIBRE
    INDUSTRIES, INC.
    On Appeal From the United States District Court
    For the District of New Jersey
    (D.C. Civ. No. 92-cv-05377)
    Argued: November 6, 1997
    Before: BECKER, ROTH, Circuit Judges and
    DIAMOND, District Judge.*
    (Filed September 9, 1998)
    _________________________________________________________________
    * Honorable Gustave Diamond, United States District Judge for the
    Western District of Pennsylvania, sitting by designation.
    Finally, another former employee at Standard, Michael
    Hydro, testified that GAF comprised eighty percent of his
    sales while he worked there and at least five of Standard's
    customers purchased exclusively GAF product. He also
    explained that in 1989 and 1990, a large number of
    townhouse projects were already "spec'd" with GAF
    product, which made it impossible for the roofers to switch
    product lines mid-stream. Thus, anyone who could not
    supply GAF product was effectively barred from bidding for
    these jobs. On the basis of all of this evidence, we believe
    that Rossi has demonstrated that a genuine issue of
    material fact exists as to whether GAF product was special,
    and necessary for a distributor like Rossi to successfully
    compete in northern New Jersey.
    Against this background on the roofing market in general
    and GAF 's place in the market in particular, we move to
    the evidence Rossi adduced that GAF used secret rebates
    with several of its biggest distributors in northern New
    Jersey, including Standard, Arzee, and Allied, for that is
    critical to understanding the motivations of Rossi's
    horizontal competitors. Pursuant to this scheme, GAF
    provided these distributors off-invoice, non-volume
    discounts on their purchases. These "rebates," assuming
    they were only offered to a few favored distributors as Rossi
    contends, allowed those distributors to sell GAF product at
    or below the prevailing market price (as set by the
    distributors who did not receive the discounts) while
    secretly conspiring to pocket the difference. In GAF district
    sales manager Bud Krusa's words, "the less [sic] people
    [who] knew about it [the discounts], the less chance you
    [the smaller distributors] have of getting it[and] dropping
    the entire market price." The most favorable inference we
    can draw for Rossi from Krusa's statement is that if these
    highly secret rebates became widely known, the smaller
    distributors who were not receiving rebates would have put
    pressure on GAF to receive equal treatment, and that this
    shakeup of the market could ultimately destabilize prices,
    lead to a price war, and "drop[ ] the entire market price" for
    GAF product.
    By adducing evidence of the GAF rebate scheme and the
    importance of GAF and GAF product, Rossi transforms
    42
    what might otherwise have been a very difficult (and
    implausible) conspiracy into a realistic opportunity for a few
    cooperating competitors to fix prices and earn substantial
    profits while still operating within what appears to be a
    competitive marketplace. Cf. Brooke Group Ltd. v. Brown &
    Williamson Tobacco Corp., 
    509 U.S. 209
    , 239 (1993)
    (holding that a conspiracy to fix supra-competitive prices in
    a market with many variables was implausible because of
    the complexity required to monitor and enforce it) (citations
    omitted).
    We find this case, as it relates to GAF, Standard, and
    Arzee, fundamentally unlike Matsushita. There, the critical
    problem with the conspiracy as alleged was that the
    conspirators had been losing large sums of money over a
    period of twenty plus years by undercutting the market in
    the hope of building market share and eventually
    establishing a monopoly. Not only did the Courtfind it
    difficult to distinguish the allegedly predatory pricing
    strategy from actual price competition, but given the
    extremely low chance that the scheme would succeed, the
    Court concluded that the defendants, if they operated in a
    rational manner, had no motive to engage in the conduct
    with which they were charged. In contrast, it is not difficult
    to divine the likely motive of the three distributors,
    Standard, Arzee, and Allied, in boycotting Rossi. As Rossi's
    horizontal competitors, they wanted to rid the market of a
    price-cutting competitor with a reputation for excellent
    service and reliability who had refused to cooperate in their
    price-fixing schemes in the past. Moreover, Rossi is aided in
    asking us to permit the fact finder to draw this inference by
    the strong likelihood that the boycott would actually
    succeed (as evidenced by the results).
    Even if all of this is true, submits GAF, it still does not
    explain why it would make sense for GAF to join the
    conspiracy. We agree that GAF 's motive, as the
    manufacturer-supplier, is less obvious than Standard's or
    Arzee's, but ultimately we find it no less compelling. This is
    because Rossi has adduced evidence that Standard, Arzee,
    and Allied possessed substantial economic leverage over
    GAF. Together, they purchased $10.7 million of the $24.1
    million of GAF product sold in New Jersey in 1989, or
    43
    44.5% of GAF 's total northern New Jersey sales. These
    distributors were not happy about the prospects of Rossi
    entering the market and competing with them, and they
    made their views known to GAF. Complaints and threats
    from three of GAF's largest customers in New Jersey are
    sufficient to establish a rational motive for GAF to engage
    in the concerted conduct that Rossi alleges. For these
    reasons, we do not accept GAF's submission that Rossi's
    conspiracy theory, and the economic motivations behind it,
    are inherently implausible.
    (2) Circumstantial Evidence Against GAF
    We turn next to the circumstantial evidence that
    supports Rossi's allegations that GAF joined with Standard
    and Arzee (and potentially others) to enforce a market-wide
    boycott of first Rossi Florence and later Rossi Roofing, The
    evidence comes in several forms. First, as we will detail,
    Rossi has adduced evidence that GAF received numerous
    complaints about Rossi's pricing practices while he was at
    Standard and responded to them by asking Rossi to raise
    his resale prices on GAF product. While these complaints
    antedate Rossi entering the marketplace, they are useful
    background information to establish motive and practice.
    See Big Apple 
    BMW, 974 F.2d at 1360-61
    .
    Second, GAF participated in the group boycott against
    Rossi through monitoring and enforcement activities and
    the implementation of an unprecedented anti-trans-
    shipment policy. Third, there is evidence that GAF singled
    out Rossi and acted contrary to its own corporate policy in
    refusing to deal with him (an important factor under
    Monsanto and Matsushita), in that GAF employees testified
    that the company had an "open distribution" policy under
    which they sold to all comers, yet GAF refused to sell to
    Rossi and went to considerable lengths to see that he was
    not able to secure GAF product from other sources. Finally,
    Rossi has also adduced evidence that two of GAF 's
    explanations why it refused to deal with him -- that it had
    adequate distribution in New Jersey and product shortage
    -- were pretextual.
    44
    (a) Distributors' Complaints and GAF's Response
    While Rossi worked at Standard, the company received,
    as did Arzee and Allied, the off-invoice, non-volume rebates
    
    discussed supra
    . Rossi used these rebates to reduce the
    prices he charged to his customers in an effort to increase
    sales volume; he did not, as his competitors did, retain the
    rebates to increase gross profits. This aggressive price-
    cutting strategy understandably angered Standard's
    competitors, and several of them complained to GAF about
    Rossi's behavior. Krusa and Licciardello, both then working
    as GAF district sales managers in the New Jersey region,
    frequently called Rossi at Standard and passed along the
    complaints of Arzee, Allied, Passaic Metals and others
    about Rossi's pricing. Krusa and Licciardello also called
    Bob Schaab, the Controller of Standard, to complain that
    Rossi was passing on the discounts given by GAF to
    Standard to his customers.
    Although GAF did not have suggested resale prices,
    Krusa and Licciardello told Rossi to raise his resale prices
    for GAF product. Schaab, relaying GAF's messages, also
    asked Rossi to refrain from passing the GAF rebates to
    Standard's customers. Rossi refused, and vowed to price as
    he saw fit. This evidence suggests several things. First, it
    reaffirms the motives of Rossi's horizontal competitors,
    Arzee and to a lesser extent Standard. Second, it shows
    that a group of distributors (even a group that did not
    include Standard) could wield economic leverage over GAF
    and influence its interactions with recalcitrant distributors.
    Third, it suggests that GAF's course of conduct was to
    curry favor with its larger distributors by doing what it
    could to assist them in stabilizing the market and keeping
    price levels up.
    We agree with GAF that evidence that it succumbed to
    pressure from distributors is not sufficient, by itself, to
    survive summary judgment, since the evidence of
    complaints and threats GAF received from Standard and
    Arzee is not enough in isolation to prove concerted action.
    See 
    Monsanto, 465 U.S. at 763-64
    ("[p]ermitting an
    agreement to be inferred merely from the existence of
    complaints, or even from the fact that termination came
    about `in response to' complaints, could deter or penalize
    45
    perfectly legitimate conduct."); 
    Sweeney, 637 F.2d at 111
    .
    However, we do not rely solely on these complaints. Rather,
    there is a substantial amount of additional evidence to
    support a finding of an unlawful conspiracy. In this
    circumstance, we are permitted to consider the evidence of
    distributor complaints. See 
    Monsanto, 465 U.S. at 764
    n.8
    ("We do not suggest that evidence of complaints has no
    probative value at all, but only that the burden remains on
    the antitrust plaintiff to introduce additional evidence
    sufficient to support a finding of an unlawful contract,
    combination, or conspiracy.").
    (b) Actions in Contravention of GAF Corporate
    Policy
    GAF's boycott against Rossi appears to be contrary to its
    own corporate policy, particularly in light of the evidence
    adduced of GAF's draconian enforcement and anti-trans-
    shipment activities. There is testimony in the record that
    GAF had an open distribution system. Peter Bacchione,
    GAF 's director of marketing and sales and Krusa's superior
    in 1989, testified that GAF never had a closed distribution
    network and never rejected a potential distributor because
    the local market was saturated. Bacchione testified:
    Q: Do you recall in 1989 whether GAF, with respect to
    the roofing products that you had responsibility for,
    had any particular objectives with respect to
    increasing, decreasing, or otherwise, its distribution
    channel.
    A: . . . We always looked to increase our share of
    business with any distributor.
    Q: Did GAF have any exclusive distributors for roofing
    products while you were national sales director?
    A: No.
    * * *
    Q: Wasn't GAF's philosophy to have an open
    distribution network?
    * * *
    46
    A: Maybe it was -- maybe it was a philosophy. A
    practice. Whether it was a philosophy that was up on
    a wall some place, I don't recall that.
    Q: Was it the practice?
    A: Generally, we sold on an open basis. There were     no
    exclusivities.14
    This testimony directly contradicts GAF's litigation
    position as stated by Krusa, who has maintained since
    1989 that GAF refused to supply Rossi because it had
    "adequate distribution."15 Krusa is also contradicted by
    Lorraine Campbell, Ruth Rogers, Mary Lou Sperr and Bob
    Tafaro, all of whom worked for Krusa, and all of whom
    testified that Krusa never told them that GAF had adequate
    distribution in New Jersey. Finally, Rossi submits that
    Krusa is contradicted by the fact that GAF supplied 34 out
    of the 39 distributors in northern New Jersey, and only
    refused to sell to three distributors including Rossi Roofing.
    On summary judgment, of course, we need not resolve this
    dispute, but rather grant Rossi all favorable inferences.
    (c) Monitoring and Enforcement Activities
    GAF, through Krusa and Licciardello, took still more
    steps to ensure that Rossi did not get any GAF product. In
    January 1989, when Droesch told Krusa that he planned to
    buy GAF product through his Florence Corporation in Long
    _________________________________________________________________
    14. Bacchione appears to contradict himself during his deposition. For
    example, in reference to the decision whether to open up ABC as a
    distributor after Rossi Roofing had gone out of business, Bacchione also
    said: "The concern was not whether or not to open up another
    distributor. The concern was whether or not we had adequate
    distribution, I think was the subject at hand. I think we felt there was
    adequate distribution. . . . There was not a valid reason to open up
    another distributor [next door to Standard]." This contradictory
    testimony leads to two possible conclusions, and on summary judgment,
    we must accept the one most favorable to Rossi.
    15. For example, Krusa allegedly told Droesch in January 1989 that GAF
    would not sell to Rossi Florence in New Jersey because it had adequate
    distribution. In July 1989, when Krusa prevented Rossi from picking up
    an order of GAF product from HWI, Rossi spoke with Krusa who told
    him, "The distribution is filled. GAF requires no other distributors."
    47
    Island and resell it to Rossi Florence, Krusa told Droesch
    that "he would not allow that and he would not sell me [sic]
    in Long Island if I did that." GAF also warned other
    distributors not to resell its products to Rossi, and there is
    evidence that, on at least one occasion, GAF took steps to
    enforce its boycott. GAF salesmen Sal Granfort and Doug
    Collins warned DiNaso & Sons, a roofing and siding
    distributor located in Staten Island, New York, not to resell
    its product to Rossi. After DiNaso & Sons ignored their
    warnings, GAF raised DiNaso's prices by $1.00/unit,
    arguably in retaliation. Similarly, when Rossi contacted
    Stroeber Supply, another northern New Jersey distributor,
    to see if it would sell GAF product to him, Larry
    Hammershock of Stroeber told a Rossi Roofing employee
    that Stroeber had already been told by GAF not to sell GAF
    product to Rossi Roofing. Hammershock defied GAF and
    sold to Rossi Roofing anyway, but at a higher price.
    There is also evidence that GAF extended the boycott to
    buying groups like HWI and Servistar which Rossi began to
    use, in addition to distributors like Stroeber and DiNaso, to
    try to circumvent the GAF boycott.16 To this end, Rossi
    _________________________________________________________________
    16. Rossi contests the district court's affirmance of an order by the
    magistrate judge, denying his motion to compel GAF to disclose the
    names of the entity or entities that were the subject matter of certain
    conversations between GAF 's in-house counsel Robert Poyourow and
    Krusa on July 27, 1989, August 10, 1989, and January 6, 1990. Rossi
    hypothesizes that several of these discussions centered around HWI and
    Servistar, and he submits that the district court abused its discretion
    when it accepted GAF's description of the "subject matter" of these
    conversations on its privilege log as "absence of a legal obligation to
    sell
    product." We conclude, however, that the district court did not abuse its
    discretion by denying Rossi's motion to compel the name of the entity
    discussed or any other additional information concerning the "subject
    matter" of the conversation catalogued in GAF's privilege log. See
    Rabushka v. United States, 
    122 F.3d 559
    , 565 (8th Cir. 1997) (standard
    of review), cert. denied, Rabushka ex rel. United States v. Crane Co., 
    118 S. Ct. 1336
    (1998). Rule 26(b)(5) only requires that a party claiming a
    privilege "describe the nature of the documents, communications, or
    things not produced or disclosed in a manner that . . . will enable other
    parties to assess the applicability of the privilege or protection." Fed.
    R.
    Civ. Pro. 26(b)(5). These matters are generally best left to the district
    and
    magistrate courts' discretion. In the circumstances that exist here, we
    will not second guess the courts' conclusion that the description
    provided was adequate to support the privilege claim.
    48
    joined HWI in July 1989 and placed an order for GAF
    product. Membership in HWI ordinarily should have
    allowed Rossi to purchase products from all of HWI's
    suppliers, including GAF. Likewise, GAF normally supplied
    its products to all HWI members, regardless of whether
    they appeared on GAF's own customer list.
    Notwithstanding this, when a Rossi Roofing driver went to
    GAF's facility on July 27, 1989, to pick up the GAF
    product ordered through HWI, GAF would not release it.
    After several hours of wrangling over the order, Rossi
    eventually spoke with Krusa, who had given the order not
    to release the GAF product. Krusa told Rossi "I am not
    selling to you. The distribution is filled. GAF requires no
    other distributors." Rossi replied that GAF was not really
    selling to Rossi Roofing, but rather to HWI, to which Krusa
    responded, "We are not selling to you." After this dramatic
    exchange, Dave Heine of HWI remarked that he had never
    seen anything like this in his ten years working at the
    buying group. App. at 2596, 3513.
    In yet another effort to obtain GAF product and
    circumvent the boycott, Rossi used Far Hills Lumber and
    Hardware ("Far Hills"), a start-up hardware store of which
    he was a principal, to place orders through the buying
    group Servistar. 
    See supra
    S II.B.2.a and infra S II.B.2.c.
    Rossi was able to purchase one order of $30,000 worth of
    GAF product on August 2 and 3, 1989. However, after GAF
    and Standard found out that Rossi had used Far Hills and
    Servistar to get GAF product, see infra S II.B.2.c, GAF
    refused to fill Far Hills' second order for $456 of GAF
    product.
    Rossi has also adduced evidence that GAF and Standard
    coordinated to ensure that Rossi was not getting any GAF
    product. 
    See supra
    S II.B.2.a. Rossi developed evidence that
    Licciardello of Standard confirmed with Gessner of GAF
    that GAF was not selling to Rossi, and there is evidence
    that, after seeing GAF product in front of Rossi Roofing,
    Licciardello called and was reassured by GAF that the load
    was not for Rossi but bound for Walmart on a Jentar truck.
    See 
    id. In addition,
    there is the statement made by
    Licciardello after he learned that Rossi Roofing had been
    getting GAF product through Far Hills and Servistar that
    49
    " `that's the last time we're going to be seeing any GAF
    across the street.' They got the -- they were getting the
    loads through [Far Hills], which is [Servistar]. That's how
    Joe Rossi was getting GAF and he's [Licciardello] going to
    put an end to that. `Never going to see another GAF load
    across the street.' " 
    See supra
    S II.B.2.a.
    (d) Pretextual Excuses
    Finally, Rossi argues that GAF used pretextual excuses to
    explain why it refused to supply Rossi, and that this use of
    pretext is further circumstantial evidence of the conspiracy
    he alleges. See 
    Fragale, 760 F.2d at 474
    (pretextual excuses
    are circumstantial evidence that can disprove the likelihood
    of independent action). The first excuse is that Rossi was
    not needed because GAF had adequate distribution. Rossi
    notes that, despite Krusa's contention that everyone in his
    office knew that he had "adequate distribution" in New
    Jersey, neither his boss, Peter Bacchione, nor his
    employees, Lorraine Campbell, Ruth Rogers, Mary Lou
    Sperr, and Bob Tafaro had ever heard of this policy. Even
    Krusa admits that GAF had never refused to fill an order
    through a buying group like Servistar because its
    distribution was allegedly full.
    This "adequate distribution" excuse is just the "flip side"
    of Rossi's contention that GAF was acting in contravention
    of its open distribution policy, and for the same reasons
    that there is a genuine issue whether GAF 's policy was to
    supply all distributors who wished to purchase its
    products, there is also a genuine issue of material fact
    whether the "adequate distribution" justification Krusa gave
    to Rossi was legitimate or simply pretextual. We note again
    that GAF supplied its roofing product to at least 34 of the
    39 distributors in the northern New Jersey marketplace,
    but not to Rossi.
    GAF's second excuse, which Rossi submits was also
    pretextual, was that GAF had a product shortage and
    therefore could not supply any new distributors. Rossi
    contends that there is a genuine issue of material fact as to
    the validity of this excuse because Bacchione, GAF's
    national sales manager, testified that he could recall no
    50
    problems in filling customer orders for GAF product in
    1989, despite the fact that this would have been a matter
    within his job responsibilities. In addition, Rossi argues
    that the only document GAF has been able to produce to
    corroborate Krusa's claim that GAF product was in short
    supply in 1988 and 1989 was a memorandum dated
    August 11, 1989. Rossi submits that this memorandum
    should not be considered conclusive for the purposes of
    summary judgment because it was written almost nine
    months after GAF had decided not to supply Rossi
    Florence. GAF counters that the memorandum refers to the
    product shortage as a "continuing" issue, and therefore that
    summary judgment is appropriate.
    The critical language in the memorandum is:
    We continue to have an im-balance of inventory
    between Baltimore and So. Bound Brook. The lack of
    warehousing has been a very critical issue, causing the
    im-balance in inventory.
    We are receiving more calls, on a daily basis, from
    customers in the southern half of the district
    complaining of our lack of product and the congestion
    of trucks and also the length of time it takes to get
    loaded at the Baltimore Plant.
    Our reading of the document is that it is ambiguous and
    therefore insufficient to command summary judgment. For
    example, it is unclear whether the memorandum refers to
    an overall GAF product shortage or just a warehousing "im-
    balance" that was temporarily interfering with delivery to
    the southern half of Krusa's territory. Also, while the
    memorandum refers to the problem as a "continuing" one,
    there is no indication what that means. On summary
    judgment, viewing the evidence in a light most favorable to
    Rossi, he has established a genuine issue of fact whether
    both the "adequate distribution" and the "product shortage"
    excuses were pretextual.
    (e) Conclusion
    To summarize, we find that Rossi has adduced competent
    evidence that GAF: (1) responded to distributor complaints
    51
    in the past; (2) singled out Rossi as one of the few
    distributors out of a large number in northern New Jersey
    not to receive GAF product; (3) acted in contravention of its
    own established open distribution policy in dealing with
    Rossi; (4) threatened and punished distributors who resold
    to Rossi; (5) refused to supply Rossi through buying groups;
    (6) implemented an unprecedented policy prohibiting trans-
    shipment of GAF product to Rossi; (7) cooperated with
    Standard in monitoring and enforcing the boycott; and (8)
    offered pretextual excuses to explain its behavior.
    Examining the totality of this evidence, it is sufficient to
    support a reasonable inference that GAF was acting in
    concert with Standard and Arzee to boycott Rossi.
    Particularly forceful is the evidence that GAF prohibited
    distributors from trans-shipping GAF product to Rossi and
    that GAF prevented Rossi from purchasing its products
    from buying groups. These actions simply do not make
    sense in light of GAF's asserted justifications for its
    behavior vis a vis Rossi. For example, if there were truly a
    product shortage in northern New Jersey, presumably GAF
    would then have cut off supply to all Servistar and HWI
    members who were not on GAF's approved customer list to
    ensure that its larger distributors like Standard and Arzee
    would not suffer from the short supply. Yet, GAF supplied
    Far Hills, also an entity that was not on GAF's customer
    list, until it discovered that Far Hills was under Rossi's
    control. Moreover, the product shortage excuse is not
    consistent with GAF's claim that it unilaterally
    implemented a policy precluding trans-shipment of product
    at the distributor level. Assuming that GAF product was
    scarce, GAF would understandably want to ensure that its
    favored distributors received it ahead of all others. However,
    once GAF decided how it would allocate among its approved
    distributors whatever amount of GAF product existed, it is
    difficult to conceive of a legitimate reason why GAF would
    care whether that distributor used the product or resold it
    to Rossi Roofing at a profit.
    Additionally, the product shortage justification does not
    explain why GAF would sell Droesch as much GAF product
    as he wanted in Long Island but would not allow him to
    trans-ship that product to New Jersey. Similarly, it is hard
    52
    to comprehend why GAF would continue to fill $30,000
    orders, obviously commercial-sized purchases, to buying
    group members in northern New Jersey, if it was truly
    believed that it had adequate distribution in that market.
    One explanation of this behavior is that GAF was acting in
    concert with Standard, Arzee, and Allied to boycott Rossi
    and force him out of business.
    For the reasons described above, Rossi has met his
    burden of adducing evidence that tends to exclude the
    possibility of independent action, and hence we will reverse
    the district court's order granting summary judgment in
    favor of GAF.
    c. Servistar
    In contrast to the defendants discussed above, we will
    affirm the district court's grant of summary judgment in
    favor of Servistar because Rossi has failed to introduce
    either direct or circumstantial evidence that tends to
    exclude the possibility that Servistar acted independently
    rather than joining the conspiracy against Rossi.
    Servistar's involvement in this case stems from its refusal
    to honor Rossi's second purchase request for $456 of GAF
    product on August 11, 1989. Rossi had already obtained a
    little over $30,000 of GAF product on August 8 and 9,
    1989, via his Far Hills account with Servistar, which was
    resold to Rossi Roofing. Two days later, when Rossi
    attempted to order a second batch, Servistar did notfill it,
    claiming that GAF had cut Far Hills off from obtaining GAF
    product. Rossi contends that after he received thefirst
    order of GAF product, Standard and Arzee discovered how
    he had circumvented the blockade, notified GAF, and that
    GAF then enlisted Servistar to join the group boycott and
    cut off this new avenue of supply. Rossi offers three pieces
    of evidence to support this allegation: (1) a discussion he
    had with Jim Cherbonneau of Servistar in which
    Cherbonneau told him that GAF did not want Servistar to
    ship its product to Rossi and that GAF would not supply
    Rossi through his Servistar account;17 (2) Servistar's
    _________________________________________________________________
    17. Cherbonneau told Rossi, "GAF called, they knew where the product
    was going. They had filled their needs in that area, and [ ] they do not
    want us to ship to you."
    53
    curious and sudden change of mind, selling Rossi $30,000
    of GAF product one day and refusing a minuscule $456
    order two days later; and (3) Servistar's use of the allegedly
    pretextual excuse that Far Hills had credit problems to
    justify its refusal to deal.
    Rossi's only direct evidence, the phone conversation with
    Cherbonneau, is not evidence of Servistar's conspiratorial
    involvement. Cherbonneau said that "GAF would not sell
    product to Servistar to go to -- through [Far Hills] to me."
    Cherbonneau's statement, while not precluding concerted
    action, is evidence only of a unilateral decision by GAF to
    not supply Rossi through any means (or a multilateral
    conspiracy that did not include Servistar). Additionally, it is
    undisputed that Servistar could not force GAF to supply it
    or its members with GAF product. Unlike other products
    Servistar supplied, Servistar neither stored GAF product in
    its warehouses nor had the contractual right to compel GAF
    to supply the product. The Servistar-GAF purchasing
    agreement did not obligate GAF to accept all of Servistar's
    members' orders.
    Because Servistar provided GAF product to its members
    on what is known in the industry as a "drop shipment"
    basis, it had no control over whether its suppliers would
    actually deliver their products to its members. The"drop
    shipment" relationship between Servistar and GAF meant
    that when a Servistar member placed an order with
    Servistar for GAF product, Servistar would forward that
    order to GAF. The member would then go to the GAF
    warehouse to pick up the GAF product directly from GAF,
    not Servistar. GAF then would invoice Servistar for the
    purchase, and Servistar would pay GAF. Subsequently,
    Servistar would collect the amount due from its member.
    Using this "drop shipment" purchasing method, Servistar
    assists its members by: (1) negotiating group discounts
    from manufacturers, and (2) acting as the guarantor of its
    members' credit to those manufacturers. Thus, Servistar's
    role did not include pre-purchasing and warehousing of
    GAF product, and it had virtually no say over which of its
    members GAF chose to supply.
    Under these circumstances, Rossi's claim that "at the
    request of GAF, Servistar refused to fill Far Hills' next order
    54
    for $450 because Far Hills had resold it to Rossi Roofing,"
    is not supported by Rossi's own testimony. As described
    above, according to the undisputed evidence, GAF did not
    have to conspire with Servistar to boycott Rossi Roofing
    because GAF did not need Servistar's acquiescence to
    prohibit Far Hills or Rossi Roofing from buying its product
    through Servistar. Since there is no evidence that Servistar
    could overrule a unilateral GAF decision to refuse to supply
    a Servistar member, we cannot reasonably infer on the
    basis of such ambiguous evidence that Servistar and GAF
    agreed to refuse to sell to Far Hills. See International
    Logistics Group Ltd. v. Chrysler Corp., 
    884 F.2d 904
    , 907
    (6th Cir. 1989) (no credible conspiracy is alleged where a
    manufacturer imposing distribution restraints does not
    need agreement or acquiescence from its distributors in
    formulating marketing conditions for its product); 6 Phillip
    E. Areeda, Antitrust Law P 1402b4 (1986) ("discussions,
    suggestions, recommendations, and the giving of
    information do not indicate any conspiracy where the actor
    imposing the alleged restraint does not wish or need the
    acquiescence of the other party or any quid pro quo from
    him").
    Similarly, Rossi's allegation that Servistar made no effort
    to require GAF to fill the order of its member Far Hills does
    not support his theory of conspiracy. Without direct
    evidence (or other strong circumstantial evidence) of
    concerted action by Servistar and GAF, we cannot draw an
    inference of an unlawful conspiracy from the equivocal
    nature of Servistar's decision not to make what would most
    likely have been a futile effort to encourage GAF to sell to
    Rossi. Servistar's refusal to disrupt its relationship with
    GAF because GAF unilaterally (from Servistar's perspective)
    refused to deal with Rossi is clearly "as consistent with
    permissible competition as with illegal conspiracy,"
    
    Matsushita, 475 U.S. at 588
    (citations omitted), and is not
    evidence of a "conscious commitment to a common
    scheme." 
    Monsanto, 465 U.S. at 764
    . We note in this regard
    that there is no evidence that Servistar was on notice that
    GAF was part of a conspiracy to boycott Rossi Roofing.
    Thus, from Servistar's point of view, this was simply a
    unilateral refusal to deal. Indeed, even if Servistar did know
    that GAF was involved in an unlawful group boycott, its
    55
    decision to continue relations with GAF would still not rise
    to the level of concerted action.
    Without direct evidence with respect to Servistar, we
    must also consider whether Rossi's conspiracy theory is
    plausible, and whether inferring concerted action under
    these circumstances would have the effect of deterring
    significant procompetitive conduct. See 
    Petruzzi's, 998 F.2d at 1233
    . Both of these considerations militate against
    inferring concerted action with respect to Servistar. Apart
    from the evidence discussed above that it would be
    unreasonable to infer that Servistar would conspire with
    GAF to do what GAF could do unilaterally (i.e. refuse to
    release GAF product to Rossi from GAF warehouses), it is
    similarly implausible that GAF, an extremely minor
    Servistar supplier, could "pressure" Servistar, a billion plus
    dollar buying cooperative, into joining the group boycott of
    Rossi Roofing, a small start-up roofing and siding
    distributor. Similarly, Rossi has adduced no evidence of a
    motive for Servistar to join the conspiracy. See 
    Matsushita, 475 U.S. at 596-97
    . Nothing in the record indicates that
    Servistar had any reason to support a conspiracy to
    increase or stabilize wholesale roofing prices in New Jersey,
    and, to repeat, there is simply no evidence of GAF leverage
    over Servistar.18
    Perhaps most importantly, inferring a conspiracy from
    the slim circumstantial evidence would have the effect of
    deterring Servistar's significant procompetitive conduct in
    this as well as many other markets. As a wholesale
    purchasing cooperative, Servistar bolsters competition and
    increases economic efficiency by aggregating small
    purchasers thereby permitting them "to achieve economies
    of scale in both the purchase and warehousing of wholesale
    supplies, and also ensur[ing] ready access to a stock of
    goods that might otherwise be unavailable on short notice.
    The cost savings and order-filling guarantees enable smaller
    retailers to reduce prices and maintain their retail stock so
    _________________________________________________________________
    18. Sales of GAF product through Servistar, estimated at about $2.5
    million, comprised only 12% of Servistar's total roofing purchases on
    behalf of its members and an insignificant fraction of Servistar's one
    billion plus national purchases in 1989.
    56
    as to compete more effectively with larger retailers."
    Northwest Wholesale 
    Stationers, 472 U.S. at 295
    . If we were
    to permit an antitrust violation to be inferred under the
    facts of this case, it would significantly impact the ability of
    Servistar to continue its procompetitive actions in the
    market.
    Because Servistar could not compel GAF to sell to Far
    Hills, Servistar's only option in response to GAF's decision
    not to supply Far Hills would have been to somehow bring
    pressure to bear on the roofing manufacturer. Such action
    would undoubtedly adversely affect all Servistar members
    nationwide who were receiving improved pricing for GAF
    product through Servistar, especially if it led to the
    restriction or cessation of Servistar's purchasing agreement
    with GAF. Indeed, inferring concerted action in these
    circumstances could encourage Servistar to terminate
    relationships with every supplier that refused to sell to a
    particular Servistar member. This would deter Servistar's
    procompetitive activities and deny Servistar's members the
    significant benefits of cooperative membership.
    Finally, Rossi submits that Servistar offered a pretextual
    excuse to explain its decision not to supply Far Hills with
    GAF product. Pretextual excuses, as noted, can disprove
    the likelihood of independent action. See 
    Fragale, 760 F.2d at 474
    . Rossi challenges Servistar's explanation that it
    refused to supply the second order of GAF product to Far
    Hills because of Far Hills' credit problems. Although it
    appears that there are genuine issues of fact concerning
    Far Hills' credit-worthiness and its impact on Servistar's
    decision to refuse Rossi's second order of GAF product,19
    considering Servistar's lack of motive to conspire, GAF's
    lack of any leverage over Servistar, and the fact that GAF
    did not need to enlist Servistar's help to boycott Rossi, this
    _________________________________________________________________
    19. On the one hand, the record indicates that Servistar refused Far Hills
    credit on August 15, 1989, even though Far Hills had only used $30,755
    of its outstanding $75,000 credit limit and no payments were yet due.
    On the other hand, Servistar contends that it extended the $75,000
    credit limit to Far Hills for the purpose of funding hardware purchases,
    not roofing supplies. According to Servistar's forceful rejoinder, the
    initial
    order of $30,755 was an error, and after it was discovered, Servistar
    unilaterally determined not to permit it to happen again.
    57
    slim reed of pretext is simply not enough. In view of the
    procompetitive role Servistar plays in the market generally
    and concerned that we do not "chill the very conduct the
    antitrust laws are designed to protect," 
    Matsushita, 475 U.S. at 594
    , we conclude that Rossi has not met his burden
    here in opposing summary judgment, and therefore we will
    affirm the district court's order granting summary judgment
    in favor of Servistar.
    d. Wood Fiber
    Like GAF, Wood Fiber manufactures roofing products,
    including Structodek FS, which is widely used in certain
    commercial roofing applications. Unlike GAF, however,
    Wood Fiber is only tangentially involved in the alleged
    conspiracy with its activity centering around a single
    incident in which Rossi was frustrated in his attempt to
    purchase approximately $5,000 worth of Structodek FS. We
    will affirm the district court's grant of summary judgment
    in favor of Wood Fiber because, as with Servistar, Rossi has
    failed to introduce evidence that tends to exclude the
    possibility that Wood Fiber acted independently rather than
    joining the conspiracy against Rossi.
    On June 6, 1989, Rossi Roofing ordered Structodek FS
    from Wood Fiber for its customer, Star Roofing. Wood Fiber
    quoted a price and a shipping date of July 5th to Rossi
    Roofing. On June 27, 1989, Karl Loser, Wood Fiber's sales
    representative in New Jersey, called and told Rossi
    Roofing's Mike Issler that Wood Fiber would notfill the
    order. As a result, Rossi Roofing lost the order for
    Structodek FS from Star Roofing. Rossi claims that Loser
    told him that Wood Fiber was being pressured by Standard
    and Arzee not to sell to him and that there was a"problem"
    with his pricing. Loser also told Issler that Wood Fiber had
    previously sold product to a small distributor on Long
    Island and suffered when Allied canceled orders in
    retaliation. Loser testified that he wanted to supply Rossi
    Roofing, but that his concerns that Rossi Roofing's
    competitors would retaliate "influenced" his decision not to
    supply Rossi Roofing.
    Based upon these facts, Rossi asks us to infer that Wood
    Fiber participated in a conspiracy to boycott Rossi Roofing
    58
    because it gave in to pressure and fear of retaliation by
    several of its distributors. It is well established that this
    kind of evidence, by itself, is legally insufficient to prove a
    conspiracy. See 
    Monsanto, 465 U.S. at 763-64
    ; 
    Sweeney, 637 F.2d at 111
    . In Sweeney, the plaintiffs contended that
    "the retailers' acts of complaining and [the defendant's]
    reaction to the complaints constituted concerted action in
    restraint of trade." 
    Sweeney, 637 F.2d at 110
    . We rejected
    that argument and noted that "even if the appellants had
    demonstrated that [the defendant's] actions were in
    response to these complaints, such evidence alone would
    not show the necessary concerted action." 
    Id. Similarly, in
    Monsanto, the Supreme Court opined that "[p]ermitting an
    agreement to be inferred merely from the existence of
    complaints, or even from the fact that termination came
    about `in response to' complaints, could deter or penalize
    perfectly legitimate 
    conduct." 465 U.S. at 763
    . Thus, the
    Court held that " `[t]o permit the inference of concerted
    action on the basis of receiving complaints alone and thus
    to expose the defendant to treble damage liability would
    both inhibit management's exercise of independent
    business judgment and emasculate the terms of the
    statute.' " 
    Id. at 764
    (quoting 
    Sweeney, 637 F.2d at 111
    n.2).
    We have explained at 
    length supra
    why the claims
    against Standard, Arzee, and GAF survive, notwithstanding
    these precedents. However, because Rossi has not adduced
    evidence of anything other than the fact that Wood Fiber
    may have responded to pressure and threats from Standard
    and Arzee, we cannot infer the existence of concerted action
    involving Wood Fiber. The evidence adduced against Wood
    Fiber stands in stark contrast to the evidence against GAF.
    For example, Rossi has not adduced any evidence that
    Wood Fiber offered pretextual excuses, or prohibited trans-
    shipment of its product, or engaged in monitoring and
    enforcement of the alleged boycott. Without some additional
    evidence, a fact finder may not infer that Wood Fiber
    entered into an agreement to boycott Rossi Florence or
    Rossi Roofing, and therefore we will affirm the district
    court's order granting summary judgment in favor of Wood
    Fiber.
    59
    III. PROXIMATE CAUSE AND ANTITRUST INJURY
    Having determined that Rossi has adduced sufficient
    evidence of a conspiracy to satisfy the first prong of the
    prima facie case with respect to the Standard defendants,
    the Arzee defendants, and GAF, we now consider whether
    Rossi has adduced sufficient evidence to satisfy the fourth
    prong, "that the plaintiffs were injured as a proximate
    result of that conspiracy." Tunis 
    Bros., 763 F.2d at 1489
    .20
    The district court concluded that even if Rossi had
    established the existence of an agreement, his claim still
    would fail because he had not established that the business
    losses he suffered were in any way related to that
    conspiracy. See Rossi v. Standard Roofing, Inc., 958 F.
    Supp. 976, 991 (D.N.J. 1997). The court determined that
    Rossi's allegations -- that the defendants prevented him
    from obtaining GAF and other roofing products he needed
    to compete and thereby stopped him from opening Rossi
    Florence and ultimately forced Rossi Roofing out of
    business -- are unsupported in the record. The district
    court also concluded that Rossi's damages expert, Regan R.
    Rockhill, CPA, based his report upon unfounded
    assumptions that would force a trier of fact to use
    "guesswork and speculation" in determining what, if any,
    injury Rossi suffered as a result of the defendants' actions.
    See 
    id. The court
    criticized the Rockhill Report for being
    nothing more than an impermissible "but for" damage
    model that erroneously ignored several important factors,
    including failing: (1) to consider that Rossi had no
    experience running his own business; (2) to analyze
    specifically what products were needed to assure a
    successful distributorship; and (3) to engage in any
    analysis of what harm, if any, was caused by the alleged
    antitrust violations as opposed to other factors, such as
    Rossi's management style or general business conditions.
    See 
    id. The district
    court accordingly held that Rossi had not
    presented sufficient evidence of damages such that a
    _________________________________________________________________
    20. As explained above, because Rossi's allegations qualify for per se
    treatment, the second and third prongs of the four-part antitrust prima
    facie case are conclusively presumed. 
    See supra
    S II.A.
    60
    reasonable inference could be made connecting the injury
    with the defendants' conduct. For the reasons we will
    explain, we disagree with the court's conclusion that Rossi
    has not identified a genuine issue of material fact with
    regard to the proximate cause and damages element of his
    prima facie case.
    To recover damages, an antitrust plaintiff must prove
    causation, described in our jurisprudence as "fact of
    damage or injury." See Danny Kresky Enters. Corp. v.
    Magid, 
    716 F.2d 206
    , 209 (3d Cir. 1983). It is not necessary
    to show with total certainty the amount of damages
    sustained, just that the antitrust violation caused the
    antitrust injury suffered by the plaintiff. See Amerinet, Inc.
    v. Xerox Corp., 
    972 F.2d 1483
    , 1493 (8th Cir. 1992); Danny
    
    Kresky, 716 F.2d at 211
    ("the standard of causation
    requires only that plaintiff prove that defendant's illegal
    conduct was a material cause of its injury"). As the
    Supreme Court explained in Zenith Radio Corp. v. Hazeltine
    Research, Inc., 
    395 U.S. 100
    , 114 n.9 (1968) (citations
    omitted) (emphasis in original):
    [Plaintiff's] burden of proving the fact of damage under
    S 4 of the Clayton Act is satisfied by its proof of some
    damage flowing from the unlawful conspiracy; inquiry
    beyond this minimum point goes only to the amount
    and not the fact of damages. It is enough that the
    illegality is shown to be a material cause of the injury;
    a plaintiff need not exhaust all possible alternative
    sources of injury in fulfilling his burden of proving
    compensable injury under S 4.
    Once causation is established, the jury is permitted to
    calculate the actual damages suffered using a " `reasonable
    estimate, as long as the jury verdict is not the product of
    speculation or guess work.' " In re Lower Lake Erie Iron Ore
    Antitrust Litig., 
    998 F.2d 1144
    , 1176 (3d Cir. 1993) (citing
    MCI Communications Corp. v. American Tel. & Tel. Co., 
    708 F.2d 1081
    , 1161 (7th Cir. 1983)) (other citations omitted).
    Thus, in antitrust cases, there are ultimately two related,
    but distinct, inquiries to establish antitrust injury. First,
    the plaintiff must prove the fact of antitrust injury, as part
    of his prima facie case; then, he must make a showing
    regarding the amount of damages, in order to justify an
    61
    award by the trier of fact. Concerning the former, courts
    apply the ordinary standard of proof, but with respect to
    the latter, the standard is somewhat relaxed. See In re
    Lower Lake Erie Iron 
    Ore, 998 F.2d at 1176
    ("[t]he relaxed
    measure of proof is afforded to the amount, not the
    causation of loss -- the nexus between the defendant's
    illegal activity and the injuries suffered must be reasonably
    proven.") (citations omitted); see also Bigelow v. RKO Radio
    Pictures, 
    327 U.S. 251
    , 264-65 (1946) (holding that when
    the plaintiff cannot prove his damages by precise
    computation, the jury "may make a just and reasonable
    estimate of the damage based on relevant data, and render
    its verdict accordingly").
    Under these standards, Rossi's antitrust claim does not
    suffer from the infirmities claimed by the district court. At
    the threshold, it is important to note that we need only
    concern ourselves with the first element of antitrust injury,
    causation. At this procedural juncture, reviewing the
    district court's grant of the defendants' motions for
    summary judgment, we are not, as we would be upon
    reviewing a jury verdict, determining whether a plaintiff has
    brought forth sufficient evidence to justify the actual
    damages awarded. Rather, here, all we are concerned with
    is whether Rossi has established that the defendants'
    "illegal conduct was a material cause of [his] injury." Danny
    
    Kresky, 716 F.2d at 211
    ; see also Zenith 
    Radio, 395 U.S. at 114
    n.9.
    We find two sources of evidence sufficient for Rossi to
    demonstrate fact of injury or causation: (1) evidence of
    specific lost transactions based upon Rossi's inability to
    purchase product; and (2) the Rockhill Damage Report. We
    discuss these in turn.
    We have already explained that there is ample evidence
    in the record that Standard, Arzee, and GAF conspired to
    deny Rossi access to GAF product and prevent him from
    competing in the roofing and siding business in northern
    New Jersey. 
    See supra
    S II.B.2.a & b. Also, there is evidence
    that, with a few exceptions, the defendants successfully
    prevented Rossi from obtaining GAF product. See 
    id. Moreover, there
    is evidence that GAF product was highly
    desirable, if not critical, to Rossi's target customers. 
    See 62 supra
    S II.B.2.b(1). Finally, several of Rossi's former
    customers from his Standard days, including Sean Coffey,
    Francis Doherty, John Feher, Albert Logan, and Melvin
    Stanley, have testified that they would have done business
    with Rossi Roofing if he had had access to the necessary
    products, primarily GAF product.
    This evidence is enough by itself to satisfy Rossi's burden
    on causation for the purposes of summary judgment. Rossi
    has put forth evidence that the defendants' alleged
    conspiracy unlawfully prevented him from obtaining GAF
    product, and that he lost multiple sales as a result. Thus,
    if Rossi can successfully prove the existence of the
    conspiracy, he will have proved fact of injury. The case
    before us is not analogous to Van Dyk Research Corp. v.
    Xerox Corp., 
    478 F. Supp. 1268
    (D.N.J. 1979), a case upon
    which the district court relied, where the plaintiff failed to
    prove fact of injury primarily because it could not show that
    it lost even a single contract based upon the alleged
    unlawful practices of the defendant. 
    See 478 F. Supp. at 1327
    .
    In the same vein, Amerinet is not availing to the
    defendants either. In Amerinet, the Eighth Circuit
    concluded that the plaintiff had not shown antitrust injury
    or causation in large part because statements and
    assertions by its own damage expert "strongly suggest[ed]
    . . . that [plaintiff's] decline was caused at least partly by,
    if not substantially or mainly by, other factors than
    [defendant's] alleged antitrust violations." 
    Amerinet, 972 F.2d at 1495
    (noting that the plaintiff's damage expert
    admitted that the plaintiff was in a period of decline prior
    to the defendant's alleged antitrust violations). In addition,
    the plaintiff in Amerinet was only able to show that, at
    most, the allegedly illegal activity was "one factor among
    many, and not a controlling or major factor" in specific
    potential clients' decisions not to purchase from the
    plaintiff. 
    Id. at 1497.
    Therefore, the Eighth Circuit held that
    the plaintiff had not adduced sufficient evidence of element
    of causation to enable it to withstand summary judgment.
    Here, Rossi's evidence is more substantial than in either
    Van Dyk Research or Amerinet. Rossi has proffered evidence
    from five specific customers that they would have
    63
    purchased GAF product from Rossi if he had been able to
    sell it to them, and Rossi's inability to consummate those
    sales (leading to a loss of business and therefore injury) is
    a direct result of the alleged antitrust violation-- the group
    boycott. In addition, Richard Droesch, Rossi's partner in
    the failed Rossi Florence venture, backed out of that
    venture at least in part based upon his understanding that
    the company would not be able to get the products it
    needed, particularly GAF product, to compete successfully
    in the market. For all these reasons, we believe that the
    record supports Rossi's allegations that he suffered
    antitrust injury, and that it was caused by the defendant's
    allegedly unlawful actions.
    The district court also utterly rejected Rossi's damage
    expert, holding that his report was nothing more than a
    "but for" damage model that failed as a matter of law to
    support Rossi's damage allegations. We believe, however,
    that the Rockhill Report, when combined with the
    testimony concerning the five lost sales, is indicative of a
    larger pattern of loss and helps Rossi demonstrate
    causation. Thus, while the other damage evidence is
    enough alone to satisfy Rossi's summary judgment burden,
    for the guidance of the district court on remand, we
    nonetheless consider the Rockhill Report.
    A typical "but for" damage model, like the one in Southern
    Pacific Com. Co. v. American Tel. & Tel. Co., 
    556 F. Supp. 825
    (D.D.C. 1983), aggregates the defendant's alleged
    violations and creates a hypothetical calculation projecting
    the plaintiff's profits and losses "but for" the defendant's
    antitrust violations. In Van Dyk Research, for example, this
    estimate was based upon an internal "task force" report
    created by the plaintiff projecting its own future
    performance. 
    See 478 F. Supp. at 1327
    . The plaintiff then
    compares this hypothetical figure with its actual
    performance to calculate its damages. Courts usually
    highlight two problems with models created using this
    methodology.
    First, they do not attempt to measure the particularized
    effects of any specific alleged illegal practices, but rather
    rely on an aggregation of injury from all factors. See
    Southern 
    Pacific, 556 F. Supp. at 1092
    . Second, their
    64
    hypothetical "but for" calculations usually rely upon
    unrealistic ex ante assumptions about the business
    environment, such as assumptions of perfect knowledge of
    future demand, future prices, and future costs that tend to
    overstate the plaintiff's damage claim. See 
    id. at 1092-93
    (pointing out many difficulties not caused by the
    defendants that negatively impacted plaintiff's profitability
    yet were not accounted for in the "but for" damage model).
    Thus, using a "but for" damage model arguably makes it
    impossible for the trier of fact to determine what, if any,
    injury derived from the defendant's antitrust violations as
    opposed to other factors, and courts sometimes reject such
    models as the basis of either causation or amount of injury.
    See Southern 
    Pacific, 556 F. Supp. at 1090
    , 1098; Van Dyk
    
    Research, 478 F. Supp. at 1327
    .
    The Rockhill Report is in many respects a "but for"
    damage model because it does not deal with the
    particularized effects of specific injuries, but rather
    aggregates all of Rossi's damages into one figure. Relying on
    Van Dyk Research and Southern Pacific, defendants argue
    that all "but for" models should be precluded as a matter of
    law from serving as a basis for antitrust causation and
    damage calculation. We do not agree with the defendants'
    reading of these cases (and, at all events, are not bound by
    them), which we conclude only stand for the proposition
    that some, not all, "but for" models are too speculative and
    must be precluded as a matter of law. The Rockhill Report,
    as we shall see, is much less speculative and does not
    suffer from many of the flaws in the damage models
    discussed in Van Dyk Research and Southern Pacific, and
    thus it is not comparable with them.
    Rockhill made two major assumptions in calculating the
    damages Rossi suffered because of his inability to procure
    products. First, he estimated that Rossi Florence and/or
    Rossi Roofing would have achieved the same pattern of
    sales revenues (and revenue growth) beginning in 1989 and
    extending to 2008 that ABC's Morristown sales branch
    actually achieved from 1990-1993, operating out of the
    same location, with Rossi as branch manager. Rossi makes
    a strong argument that this estimate took into account the
    poor general business conditions that existed at the time,
    65
    as well as any other extrinsic factors not related to the
    defendants' alleged boycott, because Rockhill based his
    estimate upon actual sales figures Rossi was able to
    achieve competing against the same firms, selling the same
    products at the same location to the same customers under
    the actual business conditions that existed at the time.21
    The second major assumption in the Rockhill Report is that
    Rossi would have been able to manage Rossi Florence and
    Rossi Roofing in the manner that he had run Standard's
    Morristown branch from 1974-1987. Rockhill used
    Standard's Morristown branch financial statements to
    develop 14-year averages for cost of sales, payroll expenses,
    equipment expenses, and administrative expenses (as a
    percentage of total sales) and applied them to the sales
    estimate. This kind of estimate, while perhaps not one upon
    which we would base our own personal investment
    decisions, nevertheless is sufficient to establish causation
    (especially when considered in conjunction with thefive lost
    transactions).22
    (Text continued on page 68)
    _________________________________________________________________
    21. Defendants also complain that it is inappropriate to use sales figures
    Rossi achieved working for ABC, a major national chain, to estimate the
    revenues that Rossi Florence or Rossi Roofing would have achieved
    without the boycott. This position has some force and is certainly an
    appropriate argument to advance before the trier of fact; however, it is
    not uncontroverted. There is ample evidence in the record that wholesale
    roofing and siding sales has a strong local accent, and that after price,
    service and reliability are the next most critical factors in customers'
    purchasing decisions. Rossi had a long track record in northern New
    Jersey, and several witnesses testified that they would patronize Rossi
    regardless of whom he worked for, as long as he carried the product they
    needed at a competitive price, because he provided the best service.
    Thus, it is not clearly evident that Rossi's salesfigures with ABC (or
    Standard) would necessarily be higher than with Rossi Roofing.
    22. For the guidance of the district court on remand, we note that the
    Rockhill Report satisfies the relaxed Bigelow standard of proof for
    estimating the amount of damages under which:
    the jury [may] conclude as a matter of just and reasonable
    inference
    from the proof of defendants' wrongful acts and their tendency to
    injure plaintiffs' business, and from the evidence of the decline
    in
    prices, profits and values, not shown to be attributable to other
    causes, that defendants' wrongful acts had caused damage to the
    plaintiffs. . . . [When] [ ] tortious acts . . . preclude[ ]
    ascertainment
    66
    of the amount of damages more precisely, by comparison of profits,
    prices and values as affected by the conspiracy, with what they
    would have been in its absence under freely competitive conditions
    . . . we [have] held that the jury could return a verdict for the
    plaintiffs, even though damages could not be measured with the
    exactness which would otherwise have been possible.
    In such a case, even where the defendant by his own wrong has
    prevented a more precise computation, the jury may not render a
    verdict based on speculation or guesswork. But the jury may make
    a just and reasonable estimate of the damage based on relevant
    data, and render its verdict accordingly. In such circumstances
    `juries are allowed to act on probable and inferential as well as
    [upon] direct and positive proof.' Any other rule would enable the
    wrongdoer to profit by his wrongdoing at the expense of his victim.
    It would be an inducement to make wrongdoing so effective and
    complete in every case as to preclude any recovery, by rendering
    the
    measure of damages uncertain.
    
    Bigelow, 327 U.S. at 264
    (internal citations omitted).
    In Bigelow, the Supreme Court upheld a jury's damage award based
    upon a comparison of the plaintiff's actual profits with the
    contemporaneous profits of a competing theater with access to first-run
    films, which were illegally denied to plaintiff theater by a group of
    conspiring film distributors. See J. Truett Payne Co., Inc. v. Chrysler
    Motors Corp., 
    451 U.S. 557
    , 566 (1981) (explaining Bigelow). The Bigelow
    plaintiff had also adduced evidence comparing his actual profits during
    the conspiracy with his profits when he had been able to obtain first-run
    films. See 
    id. This was
    enough to uphold the jury's verdict. Similarly, in
    Zenith Radio, the Supreme Court permitted the plaintiff, who had been
    the victim of an illegal campaign against importers attempting to bring
    new products into Canada, to estimate its damages by comparing its
    market share in the United States (where it competed freely) with its
    market share in Canada (where it was the target of unlawful
    distribution-disrupting tactics). 
    See 395 U.S. at 116
    n.11 & 124-25.
    Finally, we have held that "plaintiffs must be free to select their own
    damage theories as long as they are supported by a reasonable
    foundation." Danny 
    Kresky, 716 F.2d at 213
    (upholding a market share
    damage calculation approach in which the plaintiff argued that had it
    not been for the defendants' antitrust violations, it would have been able
    to achieve a percentage of the excluded market segment equal to the
    percentage of the market it enjoyed in the rest of the market generally).
    Compared with these cases, Rossi's damage estimation is far less
    67
    On the subject of the Rockhill Report, we add that the
    defendants' criticism that the report is flawed as a matter
    of law because it improperly mixes data using "a variety of
    sources including the historic operations of Standard; ABC
    actual data; input from Mr. Rossi; and judgment" is
    unavailing. Rockhill used actual data to support his
    estimates, and thus they are based upon a "reasonable
    foundation." See Danny 
    Kresky, 716 F.2d at 213
    . We do not
    suggest that Standard's problems with the report are
    baseless, only that they constitute genuine issues of
    material fact and should also be argued before the trier of
    fact.
    Finally, the defendants attack the evidence supporting
    Rossi's assertion of damages on several other bases.
    Defendants submit that Rossi Florence and Rossi Roofing
    failed because: (1) they were start-up operations, (2) they
    were founded during one of the worst recessions ever to hit
    the New Jersey housing market, (3) Rossi, as a manager,
    failed to control his costs, and/or (4) Rossi worked on other
    ventures to the detriment and ultimate failure of both
    companies. One or more of these reasons, particularly the
    theory that it was the recession, not a conspiracy, which
    mortally wounded Rossi's business efforts, might explain
    Rossi's failure in the roofing and siding business in
    northern New Jersey, and could conceivably result in a
    verdict for the defendants at trial. They are, however,
    unavailing to the defendants at this stage of the case
    because they all involve factual disputes that need to be
    resolved by the trier of fact, not by this court on a motion
    for summary judgment.
    _________________________________________________________________
    speculative. The sales revenues (at least for the first few years of the
    ten
    year estimate) were exactly those that Rossi actually achieved while
    working as ABC's branch manager at the same location. Thus, the jury
    here need not even speculate whether the comparison market (or
    location) is similar enough to serve as a basis for its damage estimate,
    as the jury had to in Bigelow and Zenith Radio. Similarly, both the sales
    and expenses are based on real world numbers, not pure conjecture by
    an optimistic new competitor. These numbers may or may not accurately
    represent what Rossi Florence or Rossi Roofing would have done had it
    stayed in business, but they are clearly not mere speculation or wishful
    thinking, as was the case in Van Dyk Research and Southern Pacific.
    68
    Standard also argues that Rossi failed to establish
    causation because an essential element in causation
    involves proving that there are no comparable substitutes
    for the desired product -- here, GAF product. See Elder-
    Beerman Stores Corp. v. Federated Dep't Stores, Inc., 
    459 F.2d 138
    , 148 (6th Cir. 1972). This is another factual issue
    that Standard may argue to the jury. As we have explained
    above, we are satisfied that Rossi's own testimony and that
    of several of his witnesses are sufficient to establish that
    GAF product was, for practical purposes, unique and highly
    desired in this market. 
    See supra
    S II.B.2.b(1).
    In sum, Rossi has established a prima facie case of
    antitrust injury with respect to Standard, Arzee, and GAF.
    He has adduced evidence of specific lost transactions
    showing causation or fact of injury, which is bolstered by
    an expert damage report that is not overly speculative as a
    matter of law. The combination of this evidence, while not
    conclusive, provides enough of a foundation that an
    eventual finder of fact would be justified in making a "just
    and reasonable inference" of the damages Rossi may have
    suffered as a result of the defendants' allegedly unlawful
    activities.
    IV. STATE LAW TORTIOUS INTERFERENCE
    WITH CONTRACTUAL AND PROSPECTIVE
    CONTRACTUAL RELATIONS
    The district court dismissed Rossi's state law tortious
    interference claims against defendants with no discussion.
    It very well may be, as some of the defendants suggest, that
    the district court concluded when it dismissed Rossi's state
    law claims that Rossi had not shown any wrongful or
    intentional conduct designed to interfere with alleged
    contractual or prospective contractual relationships. If that
    is the case, then based upon our disposition here, the state
    law claims will likely have to be reinstated with respect to
    the Standard defendants, the Arzee defendants, and GAF
    since we have found that there is sufficient evidence of their
    participation in an unlawful conspiracy to boycott Rossi.
    However, the district court may have had some other
    reason for dismissing these claims of which neither we nor
    the parties before us is aware. Our jurisprudence requires
    69
    district courts in this circuit to accompany grants of
    summary judgment with an explanation sufficient to permit
    the parties and this court to understand the legal premise
    for the court's order. See Vadino v. A. Valey Eng'rs, 
    903 F.2d 253
    , 257-60 (3d Cir. 1990). We will therefore reverse
    the district court's order dismissing the state tortious
    interference claims against all defendants and remand
    them to the district court for further consideration and
    explanation consistent with this opinion.
    V. CONCLUSION
    For the foregoing reasons, we will affirm the district
    court's judgment on the federal antitrust issues with
    respect to Servistar and Wood Fiber, but reverse on those
    issues with respect to the Standard defendants, the Arzee
    defendants, and GAF. We will also reverse the district
    court's judgment dismissing the state claims with respect
    to all defendants. The case will be remanded for further
    proceedings consistent with this opinion.
    A True Copy:
    Teste:
    Clerk of the United States Court of Appeals
    for the Third Circuit
    70