Comparing All-Or-Nothing and Proportionate Damages: A Rent Seeking Approach

This paper compares the all-or-nothing and proportionate damage rules for allocating damages in tort cases under evidentiary uncertainty. The focus is on how the two rules affect litigation expenditures by plaintiffs and defendants. The results of simulation experiments show that the expected judgment at trial is higher under the all-or-nothing rule for cases where the defendant did not take adequate care, but the judgment is higher under the proportionate rule when the defendant took more than adequate care. As for litigation expenditures, assuming equal costs of litigation, overall expenditures are higher under the all-or-nothing rule, except for very weak and very strong cases.