Poulos C, Smith VK. Selection bias in estimates of the value of open space. Poster presented at the Heartland Environmental and Resource Economics Workshop, Department of Agricultural Economics; September 2002. Ames, IA. Previously presented at the Camp Resources, Center for Environmental and Resource Economic Research.
Whittington D, McClelland E, Cassidy G, Amaral D, Poulos C, Hua W. The economic value of improving the environmental quality of Galveston Bay.. In: Colgan C, editors. Sustaining coastal resources: economics and the natural sciences. Portland: ME. Edmund S. Muskie Institute of Public Affairs, University of Southern Maine; 1995.