Acreage functions for wheat, incorporating variables that reflect the value of voluntary acreage diversion programs to producers, are estimated fro 1962-76. The elasticities of response to such programs are generally low in comparison to those for market price, indicating that the reduction of...

Adjustment of small, medium, and large Vermont dairy farms to successively tighter constraints on phosphorus loss was modeled using linear programming. Aggregate response to phosphorus control was estimated for an area from farm marginal costs. Medium and large farms have lower costs than small...

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...