Q51

Department of Economics, Princeton University, New Jersey;

Department of Economics, University of Kentucky, Lexington; Resources for the Future, Washington, D.C.;

Federal Reserve Bank of Richmond, Virginia;

Department of Agricultural and Resource Economics, Colorado State University; Elmer W. Campbell Emeritus Professor of Economics, Bates College, Maine;

National Park Service, Fort Collins, Colorado;

Department of Economics, Appalachian State University, Boone, North Carolina;

aDepartment of Economics, College of Saint Benedict/Saint John’s University, 37 S College Avenue, Saint Joseph, MN, 56374, USA, email:

bUniversité Laval, École Supérieure d’Aménagement et de Développement (ÉSAD), Québec, QC G1V 0A6, Canada. Phone number: 418 656-2131, email:

cDepartment of Earth & Environment, Department of Economics, and Institute of Environment, Florida International University (FIU), AHC5-370, University Park Campus, FIU, 11200 SW 8th Street, Miami, FL 33199, USA. Phone number: 305-348-7146, email:

dDepartment of Economics, University of Bern, Hochschulstrasse 6, 3012 Bern, Switzerland. Phone number: +41 31 684 56 35, email:

eDepartment of Economics, University of Birmingham, Birmingham, B15 2TT United Kingdom. email:

Department of Economics, University of Sherbrooke, Quebec, Canada;

State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Jiangsu, China;

Professor, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Jiangsu, China; Nanjing University of Finance and Economics, Jiangsu, China;