A simple bieconomic model (the Gordon-SChaefer model) is estimated for three species of tuna in the Eastern Tropical Atlantic. The model conformed well to the data and afforded estimates of maximum sustainable yield, bioeconomic and open access equilibria. Strong marginal stock effects were...

A spatial model of the U.S. dairy sector is used to analyze support prices at 75 and 80 percent of parity, supports based on the cost of production, a policy of minimal or non-support, and the possibility of increasing dairy imports. Results indicate that the current program of parity based...