Given wide scope for asymmetric information in huge hierarchies agents have a large capacity for opportunistic behaviour. Hidden actions increase transactions costs and cause the demand for monitoring and enforcement. Once the latter are costly, this raises questions about their scope, logistics...

A dictator issues an order, but the order is not carried out. The dictator does not know whether the order failed because the agent behaved opportunistically, or because his order contained some mistake. Imperfect information creates his dilemma : whether to punish the agent, or assist her or...