Discretion is examined as a feature of the design of rule-guided systems. That is, given that rules have to be administered by some group of persons, called adjudicators, and given that their goals may be different from society's (or a relevant organization's), when is it socially desirable to...

There is a widely held view that breach of contract is immoral. I suggest here that breach may often be seen as moral, once one appreciates that contracts are incompletely detailed agreements and that breach may be committed in problematic contingencies that were not explicitly addressed by the...

Some of the costs of enforcing laws are fixed" - - in the sense that they do not depend on the number of individuals who commit harmful acts- -while other costs are "variable"- - they rise with the number of such individuals. This article analyzes the effects of fixed and variable enforcement...

Situations in which there is uncertainty over the cause of harm are studied (e.g., was the lung cancer due to normal exposure to medical x-radiation, to smoking, to exposure to carcinogens discharged by a chemical plant?); and the effects on incentives to reduce risk of various ways of treating...

Liability and safety regulation are examined as means of controlling risks in a theoretical model of the occurrence of accidents. According to the model, regulation does not result in appropriate reduction of risk -- due to the regulator's lack of knowledge about risk -- nor does liability...

Situations in which there is uncertainty over the cause of harm are studied (e.g., was the lung cancer due to normal exposure to medical x-radiation, to smoking, to exposure to carcinogens discharged by a chemical plant?); and the effects on incentives to reduce risk of various ways of treating...