dissenting:

I dissent from the part of the majority’s opinion that holds that the district court erred in denying Gilbareo’s motion for judgment as a matter of law on the Clayton Act § 3 claim. The district court properly instructed the jury. Substantial evidence in the record supports the jury’s verdict. In holding to the contrary, the majority misapplies the proper standard of review and misconstrues Supreme Court and Ninth Circuit precedent in articulating the elements of a Clayton Act § 3 claim.

The standard for reviewing a jury verdict is whether the jury verdict is supported by “substantial evidence,” that is, such relevant evidence as reasonable minds might accept as adequate to support a conclusion. See Murray v. Laborers Union Local No. 324, 55 F.3d 1445, 1452 (9th Cir.1995), cert. denied, — U.S. -, 116 S.Ct. 1847 , 134 L.Ed.2d 948 (1996); see also Erickson v. Pierce County, 960 F.2d 801, 804 (9th Cir.1992) (“Challenges to the sufficiency of the evidence, and the denial of a motion for judgment notwithstanding the verdict, are reviewed de novo to determine if the plaintiffs claims were supported by substantial evidence.”). The credibility of the witnesses and the weight of the evidence are issues for the jury and are generally not subject to appellate review. See Murray, 55 F.3d at 1452 .

Thus, our duty is limited to determining if substantial evidence exists in the record to support the jury’s verdict. The majority, however, cites only to those parts of the record that support its conclusion, and neglects to mention those facts that support the jury’s verdict. This approach might be suitable for a trier of fact, but it is not suitable for a court of appeals that is reviewing the verdict of a properly instructed jury.

A fair reading of the extensive trial record shows more than substantial evidence to support each element of a Clayton Act § 3 claim.

Omega presented evidence to establish the following:

These facts constitute substantial evidence in support of the jury’s verdict finding Gilbarco liable for violating § 3 of the Clayton Act.

I. BACKGROUND

A. The United States Market for Retail Petroleum Dispensers

A few firms manufacture the vast majority of the retail petroleum fuel dispensers sold in the United States. These firms are Gilbareo, Dresser-Wayne, Tokheim, and Schlumberger. Gilbareo has 55% of the market, Dresser-Wayne has 18%, Tokheim has 16.1%, and Schlumberger has 7.7%. Omega’s expert, Professor Leffler, 1 testified that the retail petroleum dispenser industry is an oligopoly dominated by Gilbareo, with Dresser-Wayne and Tokheim being the other two significant manufacturers. In the past, several manufacturers of retail petroleum dispensers attempted and failed to enter the retail petroleum dispenser market in the United States because they could not obtain or create distributors.

Five hundred distributors sell and service petroleum fuel dispensers in the United States. These five hundred distributors specialize in parts and pieces “specific to the construction of underground fuel systems and the specialized materials used for building gas stations and fleet fueling or airport fueling systems.”

These distributors offer over one hundred products and services, e.g., commercial gasoline dispensers, 2 POS systems, credit card readers, vapor recovery systems, canopies, and tanks. Of all the products offered by petroleum equipment manufacturers, the most important product is the petroleum dispenser. In the words of Gilbarco’s sales manager for North America, “[petroleum dispensers] are the core of our business.”

Gilbareo prohibits its distributors from carrying more than one brand of retail petroleum dispenser. Dresser-Wayne and Tokheim also have a policy of allowing their distributors to carry only one brand of retail petroleum dispenser. Gilbarco’s standard contract with its distributors has an initial term of one year and is terminable on sixty days notice.

B. Omega’s Entry

In 1991, Omega attempted to introduce a new way to deliver petroleum dispensing equipment and services to buyers. It wanted to create a network of distributors and other service providers that could offer prospective buyers “one-stop” shopping. One advantage to such a network is that it would allow buyers to compare many different brands of products, including retail petroleum dispensers. According to Professor Leffler, Omega’s plan offered an. ideal way for a new entrant into the retail petroleum dispenser market to distribute its products.

Important in this one-stop shopping idea was recruiting distributors who could install the petroleum dispensers and service them over a long period of. time. To this end, Omega contacted existing distributors of retail petroleum dispensers. One such distributor joined the Omega network because he believed he could purchase parts from Omega “at a very small markup cost ... as opposed to paying fifteen or twenty percent markup.”

Gilbareo distributors who only carried one line of retail petroleum dispenser became worried about the possible effects of Omega’s proposed venture on their businesses. One Gilbareo distributor testified at trial that he did not want to face competition from Omega as a company that could offer more than one *1169 line of equipment, charge cheaper prices, and be the “Walmart” of the industry. This distributor was concerned that Omega distributors would gain sales at his expense by offering more choices to customers and “play[ing] one ... manufacturer [of retail petroleum dispensers] off against another to get lower prices.”

A second Gilbarco distributor wrote a letter to Gilbarco stating the following: “I feel that a Gilbarco distributor purchased by Omega should be cancelled immediately. I repeat: They are very dangerous.”

C. Retaliation Against Omega

On December 7, 1993, representatives of Omega met with representatives of Gilbarco. In the December meeting, Omega disclosed that it planned to issue catalogs and “provide one-stop shopping for customers.”

Gilbarco reacted negatively to the prospect of interbrand price competition for retail petroleum dispensers. Gilbarco’s sales manager for North America testified that he feared that Omega might become a large enough distributor to insist upon volume discounts. Gilbarco also did not want Omega to publish throughout the marketplace the lower prices that Gilbarco was able to offer to major oil companies.

At a Gilbarco Distributor Advisory Council (“DAC”) 3 meeting held on December 15, 1993, Gilbarco representatives expressed their concerns about Omega. Distributors at the Gilbarco DAC meeting stated that it would be difficult to compete against Omega. These distributors asked Gilbarco to cancel any distributorship that became a part of Omega.

Gilbarco reminded distributors of its exclusive dealing policy in a February 8, 1994, memorandum stating:

II. ELEMENTS OF A CLAYTON ACT § 3 CLAIM

Section 3 of the Clayton Act states that It shall be unlawful for any person engaged in commerce, in the course of such commerce, to lease or make a sale or contract for sale of goods ... or fix a price charged therefor, or discount from, or rebate upon, such price, on the condition, agreement, or understanding that the lessee or purchaser thereof shall not use or deal in the goods, wares, merchandise, machinery, supplies, or other commodities of a competitor or competitors of the lessor or seller, where the effect of such lease, sale, or contract for sale or such .condition, agreement, or understanding may be to substantially lessen competition or tend to create a monopoly in any line of commerce.

15 U.S.C. § 14 .

The type of contract at issue in this case is an exclusive dealing arrangement. “In practical application, even though a contract is found to be an exclusive-dealing arrangement, it does not violate the [Clayton Act] unless the court believes it probable that performance of the contract will foreclose competition in a substantial line of commerce affected.” Tampa Elec. Co. v. Nashville Coal Co., 365 U.S. 320, 327 , 81 S.Ct. 623, 628 , 5 L.Ed.2d 580 (1961). In determining whether an exclusive dealing arrangement violates § 3 of the Clayton Act, a factfinder should consider the following: (1) “the line of commerce, i.e., the type of goods, wares, or merchandise, etc., involved must be determined ... based on the facts peculiar to the case,” (2) the area of competition, i.e. “the market area in which the seller operates, and to which the purchaser can practicably turn for supplies,” 4 and (3) whether “the competition foreclosed by the contract [constitutes] a substantial share of the relevant market.” Tampa, 365 U.S. at 327-28 , 81 S.Ct. at 628 .

*1170 The critical issue in this case is the third Tampa factor: whether “the competition foreclosed by the contract [constitutes] a substantial share of the relevant market.” Id. at 328 , 81 S.Ct. at 628 . Numbers alone do not decide the question. In discussing “substantiality,” the Supreme Court instructed that

Id. at 329 , 81 S.Ct. at 629 .

In Tampa, the Supreme Court noted that the challenged exclusive dealing arrangement in that case did not substantially foreclose competition in the relevant market in part because there was no “seller with a dominant position in the market” nor an “industry-wide practice of relying upon exclusive contracts.” See Id.

The Supreme Court revisited the issue of substantial foreclosure of competition in Jefferson Parish Hosp. Dist. No. 2 v. Hyde, 466 U.S. 2 , 104 S.Ct. 1551 , 80 L.Ed.2d 2 (1984). In Jefferson Parish, the plaintiff anesthesiologist challenged the exclusive arrangement that a hospital had with a group of anesthesiologists whereby the hospital would allow only that group of anesthesiologists to provide services at the hospital. The Court ruled:

Jefferson Parish, 466 U.S. at 30 , 104 S.Ct. at 1567 .

In a concurring opinion, four Justices concluded that there was no substantial foreclosure on competition.

Id. at 45-46 , 104 S.Ct. at 1576 (O’Connor, J., concurring).

Tampa and Jefferson Parish suggest that the court should consider the following general considerations in deciding whether a challenged exclusive dealing arrangement in a market forecloses a substantial share of that market: (1) the dominance of the seller; (2) the existence of an industry-wide practice of exclusive dealing; (3) the proportion of affected commerce in comparison to the entire market; and (4) the probable effect immediately and in the future of the exclusive dealing, including effects on the ability of the consumer to change products. See Tampa, 365 U.S. at 329 , 81 S.Ct. at 629 ; see also Jefferson Parish, 466 U.S. at 30 , 104 S.Ct. at 1567-68 .

Determining if the foreclosure of the market here is substantial requires more than a review of individual considerations, however. Under the “Rule of Reason,” the trier of fact must determine if the exclusive dealing arrangement is reasonable. See Jefferson Parish, 466 U.S. at 45-46 , 104 S.Ct. at 1575-76 (O’Connor, J., concurring). “The reasonableness inquiry asks whether the restraint in question is one that promotes competition or one that suppresses competition.” Twin City Sportservice, Inc. v. Charles O. Finley & Co., Inc., 676 F.2d 1291, 1304 (9th Cir.1982) (internal quotation marks omitted). 5

*1171 The majority shortchanges the analysis required by Tampa, Jefferson Parish, and Twin City when it states that “exclusive dealing arrangements imposed on distributors rather than end-users are generally less cause for anticompetitive concern.” Majority Opinion at 1162-63 (citing Ryko Mfg. Co. v. Eden Services, 823 F.2d 1215 , 1235 (8th Cir.1987)). In Ryko, the Eighth Circuit Court of Appeals asserted that a higher standard of proof of “substantial foreclosure” is required “[wjhere the exclusive dealing restraint operates at the distributor level, rather than at the consumer level.” Ryko, 823 F.2d at 1235.

There is no Supreme Court or Ninth Circuit precedent that adopts this rule. Tampa, Jefferson, and Twin City all call for individualized examination of an alleged substantial foreclosure. See Tampa, 365 U.S. at 329 , 81 S.Ct. at 629 (listing several factors to consider in evaluating “substantiality”); Jefferson, 466 U.S. at 29 , 104 S.Ct. at 1567 (calling for “inquiry into actual effect of the exclusive contract on competition”); Twin City, 676 F.2d at 1302 (holding that a defendant’s antitrust liability depends on “the overall effects of a defendant’s conduct in the relevant market”). These cases do not suggest that a different standard should be used to evaluate exclusive dealing arrangements depending upon whether they restrict end-users or distributors. It bears repeating that the ultimate issue is “whether the restraint in question is one that promotes competition or one that suppresses competition.” Twin City, 676 F.2d at 1304 . There is no reason to deviate from this standard by imposing a general presumption which fails to account for the unique circumstances of the market in question.

The majority also creates an unnecessary presumption by concluding that the short contract length and terminability on sixty days notice of Gilbarco’s distributorship agreements “negate substantially their potential to foreclose competition.” Majority Opinion at 1163 (citing Roland Machinery Co. v. Dresser Industries, Inc., 749 F.2d 380, 394-95 (7th Cir.1984); Paddock Publications, Inc. v. Chicago Tribune Co., 103 F.3d 42, 47 (7th Cir.1996), cert. denied, — U.S. -, 117 S.Ct. 2435 , 138 L.Ed.2d 196 (1997); Barry Wright Corp. v. ITT Grinnell Corp., 724 F.2d 227, 237 (1st Cir.1983); U.S. Healthcare, Inc. v. Healthsource, Inc., 986 F.2d 589, 596 (1st Cir.1993); In re Beltone Electronics Corp. et al., 100 F.T.C. 68 , 210 (1982)).

The majority’s approach in coming to this conclusion fails to consider the context of the relevant market in which the exclusive dealing arrangements are used. Although the majority does not state a per se rule that any short term contract that is terminable on short notice cannot give rise to a violation under § 3 of the Clayton Act, I fear that such a rule may eventually emerge from the precedent created by the majority’s opinion.

In discussing the short length and terminability provisions of the Gilbarco distributorship agreements, the majority cites to several out-of-circuit cases. Close scrutiny of those cases show that they do not necessarily support the majority’s position.

In Roland Machinery Co. v. Dresser Industries, Inc., 749 F.2d 380 (7th Cir.1984), the Seventh Circuit Court of Appeals reviewed a district court’s preliminary injunction prohibiting a manufacturer of farm machinery from terminating its contract with a distributor. The manufacturer’s reason for terminating was the distributor’s decision to sell farm machinery from a competitor. The court in Roland held that the distributor had to prove two things in order to show that the exclusive dealing agreement was unreasonable:

Roland, 749 F.2d at 394 .

The court in Roland concluded that the distributor had not presented adequate evidence to meet this standard for purposes of the preliminary injunction. On the contrary, the evidence suggested that the competing manufacturer could not be kept out of the relevant market because of its size and dominance in the world market:

Id.

The Roland court speculated that the competing manufacturer was able to gain a competitive position because the exclusive dealing arrangements in that case were terminable on ninety days notice. See Id. It then stated that “[exclusive dealing contracts terminable in less than a year are presumptively lawful under section 3 [of the Clayton Act].” Id. at 395 (citing to AJBA Antitrust Section, Antitrust Law Developments 98 (2d ed.1984); Sullivan, Handbook of the Law of Antitrust 485-86 (1977); cf. Marvel, Exclusive Dealing, 25 J. Law & Econ. 1, 6 (1982)). Nevertheless, the court in Roland did not “exclude the possibility that on the full record made in the trial on the merits, [the distributor] will succeed in establishing its claim.” Id. at 396 .

The decision in Roland is distinguishable. Roland involved a market where a new competitor had come into the market and was successfully competing. In addition, the new competitor had vast resources that dwarfed its rivals who were using exclusive dealing arrangements.

By contrast, the present case involves exclusive dealing arrangements used by Gilbarco, the dominant firm in the relevant market. Over time, few competitors have successfully entered the market. 6 Most importantly, the Roland court held that the distributor might prove at time of trial that the exclusive dealing arrangements, terminable on ninety days notice, did foreclose competition in the relevant market. The majority does not allow for that possibility in this case.

Furthermore, I do not agree with the holding made by the court in Roland that exclusive dealing arrangements that are terminable in less than a year are presumptively legal. The court in Roland cited to no case law and relied only on law review articles and other secondary authority in coming to this conclusion. I know of no Ninth Circuit precedent that supports the holding made by the Roland court. In addition, I believe that this presumption of legality for exclusive dealing arrangements that are terminable in less than a year is contrary to the Supreme Court’s instructions in Tampa, which call for the trier of fact to make an individualized determination of the anticompetitive effects of an exclusive dealing arrangement in the particular relevant market. See Tampa, 365 U.S. at 327-28 , 81 S.Ct. at 627-29 .

Nor is the majority’s citation to Paddock Publications, Inc. v. Chicago Tribune Co., 103 F.3d 42 (7th Cir.1996), persuasive. In Paddock, the Seventh Circuit addressed a small newspaper’s claim that its competitors’ agreements with news services that allowed the news services to provide material only to the competitors violated § 3 of the Clayton Act. The court explicitly stated that Paddock did not involve exclusive dealing arrangements.

Paddock, 103 F.3d at 46 .

The majority cites to a sentence of dicta in Paddock which states that “the FTC and the Supreme Court concluded that even exclusive dealing contracts are lawful if limited to a year’s duration.” Id. at 47 (citing to Federal Trade Commission v. Motion Picture Advertising Service Co., 344 U.S. 392 , 395—96, 73 S.Ct. 361, 363-64 , 97 L.Ed. 426 (1953)). The authority cited by the court in Paddock does not stand for this general proposition, however. In Motion Picture, the exclusive dealing arrangements in question were the agreements between distributors of films that advertised products for sales and theatre owners. Under the agreement, the theatre owner was to show only advertising films from a single distributor. In this ease, four distributors had exclusive dealing contracts with seventy-five percent of the theatres in the United States. The exclusive dealing arrangements lasted up to five years. See Motion Picture, 344 U.S. at 393-94 , 73 S.Ct. at 362-63 .

The Supreme Court upheld a Federal Trade Commission decision to outlaw any exclusive dealing arrangements between distributors and theatre owners that lasted longer than one year. See Motion Picture, 344 U.S. at 393-96 , 73 S.Ct. at 362-64 . The Supreme Court upheld the Federal Trade Commission decision because the Federal Trade Commission came to this conclusion only after considering the totality of the circumstances in that case. See Id.

The Supreme Court also upheld the Federal Trade Commission’s decision in Motion Picture to allow exclusive dealing arrangements that lasted only one year. The Supreme Court concluded that the Federal Trade Commission’s findings for that particular case supported the determination that one-year exclusive dealing arrangements did not have unacceptable anticompetitive effects:

Id. at 396 , 73 S.Ct. at 364 .

Thus, the Supreme Court in Motion Picture agreed with the Federal Trade Commission’s determination that exclusive dealing arrangements lasting one year or less between distributors and theatre owners were legal where substantial evidence showed that the exclusive dealing arrangements were not an undue restraint and there were compelling business reasons to allow the exclusive dealing arrangements. See Id. In the present ease, the jury found just the opposite.

The majority’s citation to Barry Wright Corp. v. ITT Grinnell Corp., 12A F.2d 227 (1st Cir.1983) is also inapposite. In Barry Wright, the court examined the legality of a buyer’s agreement with a manufacturer to purchase a set amount of “mechanical snubbers.” The First Circuit first noted that such a contract was not necessarily a contract that involved exclusive dealing:

Barry Wright, 724 F.2d at 237 (internal quotation marks and citation omitted).

Furthermore, the court rejected the argument that the snubber contract length of two years had anticompetitive effects. See Id. In the snubber marketplace, buyers had to place orders at least six months in advance of delivery. See Id. Thus, given the nature of the snubber market, a contract term of two years was not unreasonable. The court also noted' that the manufacturer of the snubbers was in no position to foreclose new competition. See Id. The court considered many factors before finally concluding that the district court “could reasonably have concluded that the [contracts for mechanical snubbers] were not ‘exclusionary.’ ” Id. at 238 .

The facts of the present case are completely different from the situation presented in Barry Wright. First, there is no dispute that Gilbarco enforces exclusive dealing arrangements with its distributorships. Second, there is no suggestion that the petroleum dispenser market requires buyers to purchase retail petroleum dispensers well in advance of delivery. Third, Gilbarco has the greatest percentage of the market for retail petroleum dispensers and is in a position to foreclose new competition. Thus, Barry Wright does not support the majority’s conclusion that contract terms that provide for short length and terminability on short notice “negate substantially [the] potential [of Gilbarco’s exclusive dealing arrangement] to foreclose competition.”

The majority’s reliance on U.S. Healthcare, Inc. v. Healthsource, Inc., 986 F.2d 589 (1st Cir.1993), is also misplaced. In U.S. Healthcare, Inc., the First Circuit addressed an exclusivity arrangement whereby doctors agreed to serve only one particular HMO in exchange for higher compensation. See U.S. Healthcare, 986 F.2d at 592 . The First Circuit rejected the appeal, in part, because the appellant in that case failed to discuss factors listed by the Supreme Court in Tampa. See Id. at 595. The First Circuit noted that the following issues were simply not addressed:

Id. at 595-96 .

The First Circuit also addressed the fact that the exclusivity clause for the contracts between HMO and doctor was of short duration. Although noting that such short term contracts would not usually violate § 3 of the Clayton Act, the U.S. Healthcare court ultimately recognized that determining if a violation occurred requires the consideration of many factors. See Id.

The majority’s failure to adequately consider the totality of the circumstances in addition to the literal terms of the Gilbarco distributorship agreements is contrary to controlling Supreme Court and Ninth Circuit precedent. The better approach is to consider the overall reality of the marketplace according to the Rule of Reason. Although short length of contract and terminability on short notice are factors to weigh under the Rule of Reason, consideration of these two factors alone does not end the analysis required under Tampa, Jefferson Parish, and Twin City.

III. SUBSTANTIAL EVIDENCE OF CLAYTON ACT § 3 VIOLATION

A. First Two Tampa Factors: Defining the Line of Commerce and Area of Competition

In this case, the first two Tampa faetorsthe line of commerce and area of competí *1175 tion-consist of the sale of retail gasoline dispensers in the United States to small independent buyers who purchase retail petroleum dispensers from distributors. The majority incorrectly defines the line of commerce and area of competition as the sale of all retail petroleum dispensers from manufacturers. To understand why the relevant market does not include all sales of retail petroleum dispensers, it is important to understand the retail petroleum dispenser market.

The sale of retail petroleum dispensers to end-users occurs in two ways: (1) direct sales from manufacturers of petroleum dispensers to major oil companies and large convenience store chains; and (2) sales from distributors of petroleum dispensers to independent gasoline station owners, regional petroleum marketers, and small oil companies (“small independent buyers”).

Major oil companies purchase retail petroleum dispensers from more than one manufacturer. 7 The major oil companies want to have more than one supplier to ensure an alternate source of petroleum dispensing products. Gilbarco gives some major oil companies discounts on retail petroleum dispensers.

Small independent buyers, in contrast, purchase retail petroleum dispensers from a single distributor and develop long-term relationships with that distributor. The key reason for the small independent buyers to stay with a particular distributor is that they want a single reliable source of service and products. .One former distributor of Gilbarco retail petroleum dispensers explained:

As a result of the small independent buyers’ reliance on particular distributors, small independent buyers normally do not change distributors. For example, the customer base of one Gilbarco distributor has not changed significantly in the last forty years.

This evidence shows that the sale of retail petroleum dispensers to small independent buyers is an entirely different market from the sale of retail petroleum dispensers to major oil companies. Unlike major oil companies, small independent buyers have strong reasons to buy from a single distributor. Nor is there any evidence in the record to suggest that small independent buyers have the option of purchasing retail petroleum dispensers directly from manufacturers such as Gilbarco. Gilbarco’s own reluctance to allow discounts and dissemination of price information to small independent buyers-though discounts and price dissemination were common for major oil companies-shows that Gilbarco itself sought to maintain two distinct markets. By failing to recognize the substantial evidence in the record showing this bifurcation in the retail petroleum dispenser market, the majority incorrectly defines the line of commerce and area of competition.

B. Third Tampa Factor: Substantial Foreclosure

1. Dominance of Gilbarco

In the present case, the parties do not dispute that Gilbarco dominates the retail petroleum industry with a fifty-five percent market share. The three major manufacturers of retail petroleum dispensers in the United States-Gilbarco, Dresser-Wayne, and Tokheim-have almost ninety percent of the market. Omega presented expert testimony at trial to establish that these three manufacturers constitute an oligopoly.

2. Industry-Wide Practice of Exclusive Dealing

The parties do not dispute that Gilbarco, Dresser-Wayne, and Tokheim use exclusive dealing arrangements in the retail petroleum dispenser market by prohibiting their distributors from selling competing brands of *1176 retail petroleum dispensers. Because Gilbarco, Dresser-Wayne, and Tokheim control almost ninety percent of the United States market, their common use of exclusive dealing arrangements constitutes an industry-wide practice.

3. Proportion of Affected Commerce in Comparison to Entire Market

The proportion of the market for retail petroleum dispensers affected by Gilbarco’s exclusive dealing policies is significant. The majority recognizes that Gilbarco’s exclusive dealing to distributors affected thirty-eight percent of all retail petroleum dispensers sold in the United States. If we look to the relevant market-the sale of retail petroleum dispensers to small independent buyers-the percentage is even higher. A market foreclosure of thirty-eight percent or more is enough to make a § 3 Clayton Act violation a possibility. See Twin City, 676 F.2d at 1304 (holding that 24% foreclosure was substantial under the facts of that case).

4. Probable Effect of the Exclusive Dealing

The majority accords considerable weight to its determination that Omega failed to prove that Gilbarco’s exclusive dealing arrangements actually deterred entry into the market for retail petroleum dispensers. See Jefferson Parish, 466 U.S. at 29 , 104 S.Ct. at 1567 (stating that to prove an unreasonable restraint of competition under the Sherman Act “necessarily involves an inquiry into the actual effect of the exclusive contract on competition”). Although an inquiry into actual effect is necessary, Tampa makes clear that a Clayton Act § 3 claim only requires proof of the “probable effect of the contract on the relevant area of effective competition.” Tampa, 365 U.S. at 329 , 81 S.Ct. at 629 (emphasis added). There is no requirement that actual deterrence be proved.

The majority states that the jury could not reasonably infer probable injury to competition “where the undisputed evidence shows increasing output, decreasing prices, and significantly fluctuating market shares among the major manufacturers.” Majority Opinion at 1164-65. The majority’s reasoning is not persuasive. Even assuming that the evidence at trial showed increasing output, the jury reasonably could have inferred probable injury to competition due to the substantial evidence of price distortion and entry barriers created by Gilbarco’s exclusive dealing arrangements.

a. Price Distortion

Omega presented evidence to show that Gilbarco’s exclusive dealing arrangements prevented the prices of retail petroleum dispensers from falling as much as they would have without the exclusive dealing arrangements. The exclusive dealing arrangements for retail petroleum dispensers allowed manufacturers of retail petroleum dispensers to avoid intense price competition among themselves. Moreover, despite some decrease in prices, the prices of retail petroleum dispensers did not change much over time suggesting price stagnation.

Professor Leffler testified that under certain circumstances, exclusive dealing may have pro-competitive effects, e.g., preventing free-riding and focusing a distributor’s attention on a particular product. Professor Leffler concluded, however, that the exclusive dealing arrangements in the retail petroleum dispenser industry have no such pro-competitive effects.

b. Entry Barriers

Omega also presented substantial evidence that Gilbarco’s exclusive dealing arrangements caused actual as well as probable injury by shutting out potential competitors. To understand how this antitrust injury occurs, one must understand the retail petroleum dispenser market.

Small independent buyers purchase retail petroleum dispensers from a single distributor and develop long-term relationships with that distributor. Small independent buyers stay with a particular distributor in part because they need a single reliable source of products and services.

The majority contends that manufacturers may sell retail petroleum dispensers in two ways in addition to using distributors: (1) direct sales, and (2) creating new distributors from the group of six hundred contracting and service companies in the United States *1177 that work to build, install, and service equipment related to gas stations and fleet fueling or airport fueling systems.

For reasons already stated, direct sales of retail petroleum dispensers to small independent buyers is not a realistic possibility. Unlike major oil companies or large convenience store chains, the small independent buyer needs to buy retail petroleum dispensers from distributors in order to have a reliable source of products and services.

With regard to the majority’s speculation that a manufacturer could enter the retail petroleum dispenser market by converting members of the group of six hundred contracting and servicing companies into distributors, the majority fails to consider Professor Leffler’s testimony that the six hundred contracting and servicing companies were not a “serious” alternative to the existing group of five hundred distributors. Professor Leffler explained that this was so because the six hundred contracting and servicing companies were smaller firms that did not carry a full line of products and did not have established relationships with small independent buyers. Although the majority might prefer to believe the evidence to the contrary, this court is not free to revisit the conclusions reached by the jury where substantial evidence exists to support the jury’s verdict.

Therefore, the only effective means of selling retail petroleum distributors to small independent buyers is through an existing distributor. There are only five hundred established distributors of retail petroleum dispensers in the United States. New entrants into the retail petroleum dispenser market need to gain access to this closed group of five hundred established distributors in order to sell to small independent buyers.

In order to gain access to this group of five hundred distributors, a new entrant theoretically has two options: (1) have existing distributors carry the new entrant’s brand in addition to the brand of retail petroleum dispenser they already carry or (2) have distributors switch from their old brand of retail petroleum dispenser to the new entrant’s brand. For the reasons stated’ below, neither of these options is a practical possibility.

i) Carrying More Than One Brand

Exclusive dealing eliminates the possibility of distributors carrying more than a single brand of retail petroleum dispenser. Gilbarco effectively enforced exclusive dealing. If a Gilbarco distributor violated its exclusive dealing arrangement with Gilbarco, Gilbarco would then terminate its distributorship leaving the former distributor at least temporarily without any retail petroleum dispensers to sell to its small independent buyers. For example, after Kelley-Omega and ATS joined Omega, Gilbarco terminated its relationship with them.

ii) Switching Brands

It is also difficult for existing distributors to switch brands. Although a Gilbarco distributor has the contractual right to terminate his exclusive dealing arrangement with Gilbarco on sixty days notice and switch to a new manufacturer, this contractual right means little. Professor Leffler explained:

One Gilbarco official acknowledged that it was “very difficult for the distributor to switch from one line of pumps to another line of pumps and convince its customers that it knows what it’s doing.” Under these circumstances, the short term and easy terminability provisions of the exclusive dealing arrangements are irrelevant. No distributor would ever terminate voluntarily for fear of losing its customers and ultimately its business.

The fates of Kelley-Omega and ATS illustrate the dangers that distributors face when they switch manufacturers. After Kelley- *1178 Omega and ATS joined Omega, and Gilbarco terminated their distributorships, Kelley-Omega and ATS lost customers. As Professor Leffler explained, exclusive dealing in the retail petroleum dispenser industry caused distributorships to be closely tied to a particular brand. When a small independent buyer sees that its distributor no longer has a relationship with that particular brand, the small independent buyer loses confidence and takes its business elsewhere. ATS saw its earnings drop from two million dollars a month to only fifty thousand dollars a month. Gilbarco’s termination of ATS and Kelley-Omega caused other Gilbarco distributors to refuse to be acquired by Omega.

As the above discussion demonstrates, Omega presented substantial evidence at trial that Gilbareo’s exclusive dealing arrangements prevented distributors from carrying more than one brand of retail petroleum dispenser or from switching brands. Thus, Gilbarco’s exclusive dealing arrangements had the anticompetitive effect of preventing movement of distributors between manufacturers.

In summary, Omega presented substantial evidence showing that (1) the line of commerce is retail petroleum dispensers; (2) the relevant market is the sale of retail petroleum dispensers to small independent buyers; (3) Gilbarco dominated the relevant market; (4) exclusive dealing is widely practiced in the relevant market; (5) the proportion of the relevant market affected by Gilbarco’s exclusive dealing arrangements is very sig’nificant; and (6) Gilbareo’s use of exclusive dealing arrangements in the relevant market causes serious anticompetitive effects by keeping the price of retail petroleum dispensers artificially high and creating entry barriers to the relevant market for new entrants.

Looking at the totality of the circumstances as we are required to do under Tampa, Jefferson Parish, and Twin City, I believe that the record contains substantial evidence to support the jury’s conclusion that Gilbarco’s use of exclusive dealing arrangements tends to suppress competition in the relevant market and therefore violates the Rule of Reason.

IV. JURY INSTRUCTIONS

On appeal, Gilbarco argues that the district court’s Instruction 15-D incorrectly instructed the jury on antitrust injury. Before the district court, Gilbarco objected to instruction 15-D because the instruction did not include the following language concerning causation:

Gilbarco’s objection to this instruction lacks merit. Instruction 15-D, as given by the district court, already had the following similar language concerning causation:

Both Gilbarco’s proposed language and the language in Instruction 15-D make clear that the antitrust injury must have resulted from Gilbarco’s alleged exclusive dealing arrangement. Although Instruction 15-D may not have been worded the way that Gilbarco wanted, “[a] party is not entitled to have the jury instructed in .the particular language of his choice.” Brooks v. Cook, 938 F.2d 1048, 1053 (9th Cir.1991).

No other specific objection to the jury instructions was raised in the opening briefs. Thus, one must conclude that the district court correctly instructed the jury on the § 3 Clayton Act claim.

CONCLUSION

Omega presented substantial evidence that Gilbarco suppressed competition in the mar *1179 ketplace through its use of dealing arrangements that require its distributors to sell only Gilbarco retail petroleum dispensers to small independent buyers. Moreover, the district court correctly instructed the jury on the § 3 Clayton Act claim. Therefore, I would affirm the jury’s verdict holding Gilbarco liable for violating § 3- of the Clayton Act and awarding damages.

. Professor Leffler is a Professor of Economics from the University of Washington. Professor Leffler has expertise in the subject of exclusive dealing arrangements.

. A “retail" petroleum dispenser is sold by the manufacturer to an official distributor at a wholesale price, for re-sale by the distributor to an end-user at retail price. A "commercial” petroleum dispenser is sold by an official distributor to a buyer at a price above wholesale. Distributors of different brands of "retail” petroleum dispensers can purchase "commercial” petroleum dispensers from each other at this higher price.

. Gilbarco communicates to its distributors through its DAC. The other major manufacturers of retail petroleum dispensers also use DACs.

. The Supreme Court in Tampa also referred to the area of competition as the "relevant market.” See Tampa, 365 U.S. at 328 , 81 S.Ct. at 628-29 .

. Both Jefferson and Twin City involved examinalions of the anticompetitive effect of exclusive *1171 dealing arrangements under section one of the Sherman Act. 15 U.S.C. § 1 . In Twin City, we held that "a greater showing of anticompetitive effect is required to establish a Sherman Act violation than a section three Clayton Act violation in exclusive-dealing cases.” Twin City, 676 F.2d at 1304 n. 9. Thus, less evidence is needed to preserve a jury verdict on a § 3 Clayton Act claim on appeal than would be needed to preserve a jury verdict on a Sherman Act claim.

. The majority points to the entry of Schlumberger as evidence that new manufacturers of retail petroleum dispensers could enter the United States market. The evidence presented at trial regarding Schlumberger was mixed. Professor Leffler testified that Schlumberger has not been successful in establishing a distribution network and still does not have representation in all parts of the United States. We are not free to disturb the jury’s decision to believe the substantial evidence presented at trial that entry barriers do prevent new manufacturers from entering the United States retail petroleum dispenser market.

. Omega’s witnesses testified about Gilbarco’s relationship to the major oil companies. It is not clear from the record whether the term "major oil companies” is meant to include large convenience store chains or refers only to major oil companies.