This paper explores the incentives for, and the effects of, collusion in prices between two-sided platforms. We characterize the most profitable sustainable agreement when platforms collude on both sides of the market and when they collude on a single side of the market. Under two-sided...

We study collusion between a public firm and a private firm, characterizing the outcome (market shares, profits, and consumer surplus) that results from Nash bargaining between the two firms relative to the non-cooperative outcome. We find that if the public firm’s preference for consumer...