With the regulatory economics and the multiprincipal theory, the behaviors of regulators through cooperative game and non cooperative game are analyzed, and the conclusion that the effective regulations demand cooperation of regulators is reached.

The Multiple Principal-agent and Moral Hazard in Regulation;

This paper uses multiple principal-agent theory to study on the motivate and constraint of governmental auditor,concluding that designing the mechanism of motivate and constraint will be the fundamental factor for taking more advantage of governmental audit under current system.

The paper summarizes the latest domestic researches on the principal-agent issue in supply chain and introduces the common agent theory which concerns multi-principals and one agent.

The paper concludes that: first,only when the firms solve the incompatible and noncoherence problem,they can get the best efficiency if there are multi-principal goals in the firms; Secondly,the best selection of managers is on the no market goal of.