Case Law Index
federal2018
Additional Highlights:AntitrustTwo-Sided MarketsSherman Act
Ohio v. American Express Co.
United States Supreme Court
Key Holding
In two-sided transaction markets, courts must consider the effects of a restraint on both sides of the platform to determine whether it is anticompetitive under the Sherman Act.
Case Summary
Ohio v. American Express held that the antitrust analysis of restraints in two-sided markets must account for effects on both sides of the platform, finding that American Express's anti-steering provisions were not anticompetitive when both cardholders and merchants were considered together.