We study the dynamics of entry and exit based on firms' learning about their relative cost positions. Each firm's marginal cost of production is its own private information, thereby facing ex ante uncertainty about its cost position. The (inelastic) market demand can accommodate only a fraction...

We study an infinitely repeated Bertrand game in which an i.i.d. demand shock occures in each period. Each firm recieves a private signal about the demand shock at the beginning of each period. At the end of each period, information about both the underlying demand shock and the rival's prices...

We study an infinitely repeated Bertrand game in which an i.i.d. demand shock occurs in each period. Each firm receives a private signal about the demand shock at the beginning of each period. At the end of each period, all information but the private signals becomes public. We consider the...

This dissertation studies the role of market friction in overcoming moral hazard in market settings without information flows. It consists of four chapters. The first chapter introduces the general topic. The second chapter studies optimal wage contracts for motivating workers. It compares three...