A note on crime and punishment

The models developed here are intended to convince the reader that Tsebelis' results — that increased punishment leaves the equilibrium level of crime unchanged — is an example of what is possible rather than a general result. To recap the argument in words: it is true that raising the penalty on a crime may cause the enforcing agency to divert attention away to other matters, so that theexpected penalty facing the prospective criminal is not as high as it would have been had the agency not adjusted; but it is not generally true that enforcing agencies will choose to lower their probabilities of enforcement just enough to exactly offset the increased penalty, leaving the expected penalty unchanged, hence the equilibrium level of crime unchanged.⁸ this result sounds unusual when stated in words and it is when modelled using the theory of games too.This work was supported by NSF grant SES-9022882.