This article investigates the relationship between optimal gear selectivity and effort cost in the fishing industry. We first show that optimal selectivity depends negatively on the level of effort cost, but that this relationship is not continuous. Optimal selectivity switches when real effort...

In this paper, we develop an empirical test of consistency in contingent willingness topay (WTP) responses, which is based on the following a priori expectation. In economics,when an individual considers paying for public goods, his decision to pay, and his WTP arebased on utility-maximising...