Recommended readings (Machine generated): Michael R. Baye and John Morgan (2001), 'Information Gatekeepers on the Internet and the Competitiveness of Homogeneous Product Markets', American Economic Review, 91 (3), June, 454-74 -- Jean-Charles Rochet and Jean Tirole (2003), 'Platform Competition...

Many empirical studies of online price dispersion show that sellers post different prices for homogeneous goods. However, seller heterogeneity is difficult to control for and posted prices may not reflect price dispersion in actual transactions. We contribute to this literature by selling...