We compare the number of active firms, i.e. the number of firms producing a positive quantity, in equilibrium across four different models of oligopoly. The two main models are Cournot where quantity is the strategic variable and prices are determined by the market, and Bertrand where price is...

Firms in traditional markets often compete in output à la Cournot. In this paper, we consider Cournot competition between platforms in a two-sided market. We find that the markup and markdown terms are distorted toward zero for greater levels of platform competition and for greater levels of...