WASHINGTON - By introducing a special rule for “two-sided” markets, the Second Circuit needlessly departed from a longstanding approach to antitrust law. Its new rule greatly raises the burden that a plaintiff in the “twosided” market context must carry at the very earliest stage of litigation. Not only is the new rule unjustified, it is pegged to a concept that is contested and ill-defined. Defendant companies ranging from airlines to chicken processors could reasonably claim that they meet the definition of “two-sided,” winning themselves more favorable judicial review.

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