Cet article analyse la désirabilité sociale de l'assurance de responsabilité lorsque les comportements de prévention sont imparfaitement observables. On sait que l'assurance de responsabilité est socialement avantageuse en responsabilité sans faute, même s'il y a aléa moral et que...

This paper analyzes the cost and incentive properties of the standard of proof for a finding of negligence. In common law, the usual standard is for courts to decide on the basis of a so-called balance of probabilities or preponderance of the evidence. We show that, if producing information...

This paper analyzes the incentive properties of the standard and burden of proof for a finding of negligence, when evidence about injurers' behavior is imperfect and rests with the parties. We show that the `preponderance of evidence' standard used in common law, together with ordinary exclusion...

We model a simple justice system in which a court is mandated by society to assess the guilt and the punishment of an accused. The court takes prison facilities as given and neglects its impact on the cost to society of implementing the sentence. Clearly, the court, in this world, will condemn...

A model where a portion of the population participates in illegal activities is developed. The propensity to participate in crimes depends on the probability and the opportunity cost of being arrested. The government can influence these variables by law enforcement expenditure and by social...