Abstract

It is widely held that the proper role of criminal punishment is to ensure in a cost-efficient manner that criminal laws will be obeyed. As James Buchanan puts it,the reason we have courts is not that we want people to be convicted of crimes but that we want people not to commit them. The whole procedure of the law is one, essentially, of threatening people with unpleasant consequences if they do things which are regarded as objectionable.According to the deterrence theory of punishment, which I will here accept without argument in order to tease out some of its implications, legislators must be aware of opportunities to maximize the threat value of criminal prohibitions. By maximizing deterrence, we minimize the cost of crime. On the other hand, creating these threats, and carrying them out, is also costly. So we also wish to minimize the cost of avoiding crime. An efficient deterrent, therefore, will be one which minimizes the sum of the costs of crime and crime avoidance, where ‘cost’ is to be broadly construed.