Opinion ID: 734211
Heading Depth: 4
Heading Rank: 2

Heading: is there any potential anticompetitive effect?

Text: 37 As noted above, to establish potential anticompetitive effect amounting to a violation of Section 1 under the rule of reason, the evidence must show that the defendants possess market power. This power must be shown to exist in properly defined geographic and product markets. Further inquiry into market definition in this case is, however, unnecessary. Assuming, arguendo, that plaintiff's definition of the relevant geographic and product markets pass legal muster, fifteen percent of the retina referral market is insufficient, as a matter of law, to establish market power. 38 Because plaintiff has failed to establish that the per se rule governs the case and because there appears to be no triable fact issue under the rule of reason, defendants' motions for summary judgment on Count I of the complaint should be granted.