Pesticide externalities in Adean potato production: integrated production and biophysical models of groundwater contamination, by Cecile E. H. Ducrot; Analysis of factors influencing fair market and restriced land use values of farmland in New Jersey's purchase of development rights program via hedonic pricing models, by Nancy S. Lee; Conjoint analysis of Australian consumer preference for pork products produced with genetically engineered porcine somatotropin (pST), by April D. Parsons; Determining the best uses of mangrove areas: an application of dynamic optimization to the case of shrimp mariculture in Ecuador.