1. School
of Natural Resources and Environment, University of Michigan, Ann Arbor, Michigan 48109-1041, United States
2. School
of Economics and Management, Beihang University, Beijing, 100191, P.R. China
3. School
of Economics and Management, North China Electric Power University, Beijing 102206, P.R. China
4. School
of International Development, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
5. Department
of Civil and Environmental Engineering, University of Michigan, Ann Arbor, Michigan 48109-2125, United States
6. Sustainable
Development and New-Type Urbanization Think Tank, Tongji University, Shanghai, 200092, P.R. China