How does antitrust law apply to multisided markets like credit card platforms and ridesharing companies? On June 25, the Supreme Court released its opinion in the case of Ohio v. American Express, which answered this very question.

Professor Joshua D. Wright of Antonin Scalia Law School explains the opinion, authored by Justice Clarence Thomas, and how the Court established a simple test to determine whether there is an anticompetitive effect on merchants and/or cardholders.

As always, the Federalist Society takes no particular legal or public policy positions. All opinions expressed are those of the speaker.

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