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Communication And Concerted Action, William H. Page

William H. Page

It is a familiar scenario in U.S. antitrust litigation: The plaintiffs allege that a pattern of identical pricing (or refusals to deal) is "concerted" and therefore per se illegal; the defendant responds that the practice is merely "consciously parallel" or "interdependent" and therefore legal. Under U.S. law, to avoid summary judgment or judgment as a matter of law, a plaintiff must produce a "plus factor," evidence that "tends to exclude the possibility" that the defendants' actions were merely interdependent. Courts have identified various plus factors -- for example, evidence that the alleged conduct was against the defendant's interest unless it …