A discrete-time, nonlinear, deterministic model for an open-access fishery is developed and the equilibrium is characterized. The open- access exploitation of North Sea herring during the period 1963-77 is analyzed. Alternative production functions are considered and estimated for the Norwegian...

An option-value (or stopping-rule) model is developed to determine the optimal timing and expected value of policies (bullets) to slow global warming. The model and policies are calibrated to reflect current estimates or predictions of temperature drift, variance, damage, and the cost of slowing...

Starting in the 1960s, considerable opposition to the Canadian and Norwegian harp seal hunt off Newfoundland developed. It was alleged that the seal hunt was unethical and that the seal population had been seriously depleted. The purpose of this paper is to analyze the production function for...

The concept of coevolution is reviewed and a model is developed in an attempt to make the concept operational. The location, scale, and timing of economic activities in a buffer zone to a park or preserve are related to an index of biodiversity. Coevolution would occur if a trajectory of...