Abstract: The game relations are the important factors which affect pollution abatement among the enterprise, government and environmental regulatioin agency in pollution abatement. By game theory,this paper analyzes the possibility of collusion between the enterprise and environmental regulatioin agency ,and the necessity of government supervision under the circumstance of asymmetric information.The paper also establishes multiple principal-agent model which includes the stage of contract design and supervision and the stage of collusion.Based on it, we get the key variables which affect the stakeholders' behaviros.Finally, the paper provides corresponding policies.

Key words: environmental regulation, multiple principal-agent, collusion, regulatory capture

摘要： 环境规制中企业、政府和环境规制机构三者之间的博弈关系是影响环境污染治理的重要因素。本文运用博弈论原理,分析了信息不对称下规制机构与企业合谋的可能与政府监管的必要,将环境规制划分为规制合约的设计与选择、执行与监管两个阶段,构建了多阶段的委托代理模型,考察了政府合约设计和监管、环境规制机构与企业合谋的因素,得到了环境规制中影响行为主体的关键政策变量,并提出了相应的政策建议。

关键词: 环境规制, 多层委托—代理, 合谋, 规制俘虏