We model duopoly competition between two platforms. They operate in a two-sided market where agents are heterogeneous on both sides of the market and are allowed to multihome. Network effects are captured within a vertical differentiation framework. Under single-homing there exists an interior...

We study duopoly competition between a domestic and a foreign firm who first choose their quality and then compete in prices in the domestic market. As is well known, the free-trade equilibrium exhibits quality differentiation and indeterminacy of the quality leader. We show that an import quota...