"Minimum asset and liability insurance requirements must often be met in order for parties to participate in potentially harmful activities. Such financial responsibility requirements may improve parties' decisions whether to engage in harmful activities and, if so, their efforts to reduce risk....

The government often provides relief against large risks, such as disasters. A simple, general rationale for this role of government is considered here that applies even when private contracting to share risks is not subject to market imperfections. Specifically, the optimal private sharing of...

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...