1. Depart of Economics, School of Economics, Jinan University, Guangzhou, Guangdong, P. R. China
2. Institute of Resource, Environment and Sustainable Development Research, Jinan University, Guangzhou, Guangdong, P. R. China
3. Innovation, Policy and Entrepreneurship Thrust Area, Hong Kong University of Science and Technology (Guangzhou), Guangdong, P. R. China