Institution: | [1]School of Forest Resources, University of Washington, Seattle, WA 98195-2100, USA [2]Department of Economics, Iowa State University, Ames, IA 50011, USA [3]Centre for Agriculture and, Rural Development, Iowa State University, Ames, IA 50011, USA [4]College of Engineering, North Carolina A&T State University, Greensboro, NC 27411, USA |