In our principal-agent model, the principal can repeatedly delegate authority to an agent with uncertain preferences or take the decisions himself. The principal learns the state at the end of each period and then updates his belief about the agent's bias based on the decision implemented if he...

Adverse selection harms workers, but benefits firms able to identify talent. An informed intermediary expropriates its agents' ability by threatening to fire and expose them to undervaluation of their skill. Agents' track record gradually reduces the intermediary's information advantage. We show...

This paper studies the optimal refund mechanism when an uninformed buyer can privately acquire information about his valuation over time. In principle, a refund mechanism can specify the odds that the seller requires the product returned while issuing a (partial) refund, which we call stochastic...