TESTING FOR RELATIVE PERFORMANCE BETWEEN SEASONS IN A FISHERY

The relative performance between seasons in a fishery is tested empiri cally. In particular, the importance of a stochastic environment-what may be denoted as fishing luck in a fishery-is established by applying Dickey-Fuller unit-root tests for the efficiency scores of vessels be tween seasons. More specifically we test whether the performance of in dividual vessels can be characterized as random or not; i.e., given go od performance in one period, is it possible to also expect good perfo rmance in the next (a so-called ''highliner''), or is performance due to the stochastic environment (fishing luck).