An econometric model of U.S. and Maine apple production and prices was estimated with ordinary least squares multiple regression. A Gauss-Seidel solution technique was used to examine the equation system goodness of fit and to forecast endogenous variable values. Results indicate that supply expansion in the U.S. and Maine will continue, but Maine's slower rate of increase will erode its market share. Apple prices for the U.S. and Maine are predicted to decline in real terms by the year 2000 if inflation rates exceed 3 percent annually during the period 1982 to 2000.

Flows of water pollutants from agricultural sources are, for all practical purposes, unobservable by direct monitoring. These flows can, however, be estimated using hydrological models. The analysis presented in this paper demonstrates that uncertainty on estimated flows is not neutral with respect to the optimal level and allocation of estimated abatement or with respect to the expected net benefits of alternative pollution control policy instruments. Policy implications are noted.