1. Howard H. Baker Jr. Center for Public Policy and Department of Economics, University of Tennessee, 1640 Cumberland Ave, Knoxville, TN 37996-3340, US
2. Department of Watershed Sciences, Utah State University, 5210 Old Main Hill, NR 210, Logan, UT. 84322-5210, US
3. Department of Civil and Environmental Engineering, University of California, Merced, USA
4. School of Transnational Governance, European University Institute, Italy