Politicians differ in their ability to implement some policy. In an election, candidates make commitments regarding the plans they will try to implement if elected. These serve as a signal of true ability. In equilibrium, candidates make overambitious promises. The candidate with the highest...

In a market environment with random detection of product quality, a firm can employ umbrella branding as a strategy to convince consumers of the high quality of its products. Alternatively, a firm can rely on external certification of the quality of one or both of its products. We characterize...

Consider an agent (manager, artist, etc.) who has imperfect private information about his productivity. At the beginning of his career (period 1, short run"), the agent chooses among publicly observable actions that generate imperfect signals of his productivity. The actions can be ranked...