Fixing the levels of effluent charges poses some severe problems. 把排污收费规定在一个水平上，又引起一些严重问题。
In this paper,an incentive mechanism for implementation of effluent charge under unsymmetrical information was designed. 应用激励机制设计理论设计了有限信息下应用排污收费对排污者进行管理的一种激励机制。
