This paper studies the use of incentive contracts in the Bolton-Scharfstein (1990) model when some agents in the population are technically constrained from falsifying reports and stealing cash. The original Bolton-Scharfstein contract may not be optimal for a large range of parametric values....

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...