Auditing without commitment

I study the optimal contract when a principal cannot commit to an audit policy. The contract must provide incentives for the agent to comply as well as for the principal to audit. The key tradeoff is efficiency versus noncompliance instead of the familiar rent versus efficiency. Information rent is zero whether production cost is high or low. For high production cost, the agent is asked to produce greater than the amount under full information. The probability of audit is higher when the principal cannot commit compared to when he can.