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991657P.pdf   08/03/2000  Gail Brookins  v.  Intl. Motor Contest
   U.S. Court of Appeals Case No:  99-1657
   Northern District of Iowa   
Civil case - Antitrust. In sports activities, unless a rule-maker's decision was tainted by supplier coercion, the exclusion of a particular kind of equipment is the incidental result of defining the rules of the game and does not constitute a violation of the antitrust laws; district court did not err in requiring plaintiffs to define the relevant market and to show that IMCA had market power in that market; given that auto racing has many classes, plaintiffs could not define the relevant market as IMCA-sanctioned modified car racing; plaintiff failed to show IMCA colluded with plaintiff's rivals to exclude its modified transmission.