Competition Law As Common Law: American Express and the Evolution of Antitrust
antitrust, two-sided markets, platforms, rule of reason, common law
62 Pages Posted: 12 May 2020 Last revised: 28 May 2020
Date Written: May 26, 2020
Abstract
We explore the implications of the widely accepted understanding that competition law is common — or “judge-made” — law. Specifically, we ask how the rule of reason in antitrust law should be shaped and implemented, not just to guide correct application of existing law to the facts of a case, but also to enable courts to participate constructively in the common law-like evolution of antitrust law in the light of changes in economic learning and business and judicial experience. We explore these issues in the context of a recently decided case, Ohio v. American Express, and conclude that the Supreme Court did not apply the rule of reason in a way that enabled an effective common law-like evolution of antitrust law.
Keywords: Antitrust Law, Common Law, Credit Cards, Supreme Court, Rule of Reason, Ohio v American Express, Apple v Pepper
JEL Classification: L10, L12, L13, L14, L40, L41, L42
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