1. Professor Emeritus, Department of Economics, University of Cambridge, Cambridge, CB3 9DD, UK.
2. Mahatma Gandhi Institute of Education for Peace and Sustainable Development, New Delhi, 110001, India.
3. Departments of Urban and Environmental Engineering, School of Engineering, Kyushu University, Nishi-ku, Fukuoka, 819-0395, Japan.
4. College of Business Economics and Finance Department, University of Wyoming, East Laramie, WY 82071, USA.
5. MIT Engineering Systems Division, Cambridge, MA 02142, USA.
6. Central University for Finance and Economics, Hunan University, Changsha, Hunan Province, 410006, China.
7. Department of Humanities and Social Sciences, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076, India.
8. Statistics Norway, N-0033, Oslo, Norway.
9. Department of Economics, Purdue University, West Lafayette, IN 47907, USA.