Natural resource and environmental economics. Conducts research in non-market evaluation of natural resources, environmental policy analysis, integrated watershed management, environmental risk analysis and integration of biophysical simulation, economic modeling and geographic information systems for resource management. Recent research focuses on modeling and evaluating the interactions between land and water resources, evaluating the technical, social, economic and institutional factors that affect protection and preservation of hydrologically sensitive areas in landscapes and their policy implications for watershed and stormwater management and smart growth in environmentally fragile rural-urban interfaces, and adaptively managing agricultural ecosystem for future climate and land use changes.