United States v. Warren Mackey

Oral argument

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Source: CourtListener oral-argument corpus (CC0).

How courts have described this case

Verbatim parenthetical descriptions written by other courts when citing this decision. Ranked by citation-network relevance.

• holding that in product-tying claim thirty percent control of relevant market was insufficient to warrant a finding of per se invalidity
• holding that an exclusive dealing arrangement between hospitals and anesthesiologists was not per se illegal
• holding that “any inquiry into the validity of a tying arrangement must focus on the market or markets in which the two products are sold, for that is where the anticompetitive forcing has its impact”
• holding that a market share of 30% was insufficient to permit exercise of market power
• noting that in absence of per se liability, antitrust plaintiff must prove that defendant's conduct had an \actual adverse effect on competition\
• holding, as a matter of law, that thirty percent share of the relevant market is insufficient to confer market power

Source: CourtListener parenthetical corpus (CC0).