... Crum Certifies that this is the approved version of the following dissertation: Oil, Pollution, and Crime: Three Essays in Public Economics Committee: Don Fullerton, Supervisor ... 1.1 are estimated using SMM according to the strategy outlined in Lee and Ingram (1991). The discount factor is set to 0.9, consistent with the findings of Adelman (1993), and the constant cost ... increasing or decreasing in cumulative discoveries, depending on the level of CD and the values of γ0 and γ1. Using the cumulative discoveries to date, the number of firms that enter in equilibrium,...