Regulatory agencies frequently present violators with warnings, not pursuing prosecution if the violation ceases upon receipt of the warning. We show how such warnings may help regulators to keep control: Prosecution is costly for the regulator, and insu.cient prosecution e.orts yield low...

It has often been claimed that firms' compliance to environmental regulations is higher than predicted by standard theory, a result labeled the "Harrington paradox" in the literature. Enforcement data from Norway presented here appears, at first glance, to confirm this "stylized fact": Firms are...

Regulatory agencies frequently present violators with warnings, not pursuing prosecution if the violation ceases upon receipt of the warning. We show how such warnings may help regulators to keep control: Prosecution is costly for the regulator, and insufficient prosecution efforts yield low...