I study the properties of optimal long-term contracts in an environment in which the agent's type evolves stochastically over time. The model stylizes a buyer-seller relationship but the results apply quite naturally to many contractual situations including regulation and optimal...

Why do some markets remain illiquid even when there is a positive gain from trade? In order to understand the real determinants of market liquidity in decentralized markets, we are going to analyze this question in a competitive market setting when both search frictions and adverse selection...

I analyze common agency games in which the principals, and possibly the agent, have private information. I distinguish between games in which the principals delegate the final decisions to the agent, and games in which they retain some decision power after offering their mechanisms. I show that,...