Competing Mechanism Games of Moral Hazard: Communication and Robustness

We consider multiple-principal multiple-agent models of moral hazard: principals compete through mechanisms in the presence of agents who take unobservable actions. In this context, we provide a rationale for restricting principals to make use of simple mechanisms, which correspond to direct mechanisms in the standard framework of Myerson (1982). Our results complement those of Han (2007) who analyzes a complete information setting where agents’ actions are fully contractible.