This article surveys the literature on principal-agent problems with moral hazard that gained popularity following the seminal works of Mirrlees (1976), Holmström (1979), and others. This literature is concerned with designing incentives to motivate one or more workers—typically by paying for...

We study the interaction between a group of agents who exert costly effort over time to complete a project, and a manager who chooses the objectives that must be met in order for her to sign off on it. The manager has limited commitment power so that she can commit to the requirements only when...

Consider an agent who can costlessly add mean-preserving noise to his output. To deter such risk-taking, the principal optimally offers a contract that makes the agent's utility concave in output. If the agent is risk-neutral and protected by limited liability, this concavity constraint binds...