1. Department of Economics, Business School, East China University of Science and Technology, Shanghai, China.
2. Division of Finance, Economics and International Business, Lewis College of Business, Marshall University, Huntington, WV, USA.
3. Department of Agricultural, Environmental, and Development Economics, The Ohio State University, Columbus, OH, USA; Social Sciences Department, Gran Sasso Science Institute, L’Aquila, Italy; and School of Economics, Jinan University, Guangzhou, China.