ABSTRACT The illusion of explanatory depth, which has been identified by cognitive psychologists, may play a prominent role in encouraging regulatory action. This special type of overconfidence would logically lead regulators to believe that they are aware of the relevant causes and consequences of the activities they might regulate, and of the unintended side effects of the regulatory actions they are contemplating. So, as with other cognitive biases, the illusion of explanatory depth is likely to lead to mistakes. And unlike (...) the biases that have been the focus of so much behavioral economics, the illusion of explanatory depth is uniquely resistant to correction by those who are aware of it as a general problem and rigorously attempt to keep it under control. (shrink)