From an economic perspective tort law is to serve two important functions: deterrence of wrongdoers and victim compensation. We can easily construct examples of torts leading to small and widespread harm for which it is questionable whether a rational victim will initiate an individual lawsuit....

In the law and economics literature liability is generally regarded as an instrument which provides potential tortfeasors with incentives for optimal care taking. The question, however, arises whether liability can still provide those incentives when risks are unknown. That is the central...