During the second half of the twentieth century, competition policy has been accorded an increasingly prominent role in the policy portfolios of industrialized nations. Since the late 1940s, when twenty-three nations ratified the first General Agreement on Tariffs and Trade (GATT), tariff...

We study a two-sided market where a platform attracts firms selling differentiated products and buyers interested in those products. In the unique subgame perfect equilibrium of the game, the platform fully internalizes the network externalities present in the market and firms and consumers all...