[en] Many industrial accidents result in losses (material damages or bodily injury) that cannot be perfectly compensated by a monetary payment, nor be perfectly insured. Moreover, often injurers control ex ante the magnitude rather than the probability of accidents. We study the characteristics of optimal levels of care and distribution of risk under these circumstances. We then examine whether ordinary liability rules, regulation, insurance, taxes and subsidies can be used to implement the first-best outcome. Finally, our results are discuss in the light of fairness considerations (second best view). [/en]