Violent conflict destroys resources. It generates “destruction costs.” These costs have an important effect on individuals' decisions to cooperate or conflict. We develop two models of conflict: one in which conflict's destruction costs are independent of individuals' investments in...

In this paper we first consider alternative measures of efficiency. We explain why simple partial productivity measures are inadequate as the basis of overall measures of efficiency, and outline two alternative approaches. The first is technical efficiency - the degree to which output is...