| Summary: | Random accidents can be contained by collective penalties. These penalties are not likely to be enforced but rather induce self-reporting that enhances welfare due to early containment. Self-reporting under collective penalties increases overall welfare, but may increase expected environmental cost. Even when regulation is constrained by an upper limit on the acceptable collective penalty, the threat of collective penalties can induce an incentive-compatible mutual insurance scheme under which a side-payment is made to the agent that self-reports an accident. This self-reporting mechanism is welfare-improving, but first-best outcomes can only be obtained when the collective penalty is unconstrained, or when an honor system applies. In cases when there is a new externality that requires fast response (avian flu),collective penalties can compliment or substitute for monitoring Ambient tax; collective penalties; enforcement; self-reporting
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