I study a merger between producers of complement inputs facing entry of superior inputs, with investment by the incumbents in deterministic cost reduction and by the entrants in probabilistic innovation, and competition in prices. The merger is profitable by solving Cournot complementarity...

I analyze the Renaissance art market in Italy through a unique dataset on primary commissions between 1285 and 1550. Hedonic regressions on the real price of paintings allow me to advance evidence that the art market was to a large extent competitive, and that an important determinant of...

We study platforms competing in commissions on revenues of sellers engaged in monopolistic competition, as the app providers on the app stores of iPhones and Android devices. Free entry of sellers on each platform generates multihoming superstars and a long tail of singlehoming sellers....