Abstract:
In this paper, we characterize optimal regulatory policies composed of pollution standards, probabilities of inspection and fines for non-compliance, in a context where both monitoring and sanctioning are socially costly, and penalties may include gravity and non-gravity components at the regulator's discretion. The optimal policy entails compliance with the standards as long as a quite intuitive condition is met. Non-compliant policies may include standards even below the pollution levels that minimize the sum of abatement costs and external damages. Interestingly, the appropriate structure of penalties under non-compliance is highly progressive, while the best possible shape of the fines under compliance is linear only if non-gravity sanctions are not allowed.