1. School of Economics, Tianjin University of Commerce, Tianjin, China
2. Research Institute of Social Development, Southwestern University of Finance and Economics, Chengdu, China
3. School of Economics, Guizhou University, Guiyang, China
4. School of Land Resources and Environment, Jiangxi Agricultural University, Nanchang, China
5. Faculty of Computer Science and Information Technology, Universiti Putra Malaysia, Selangor Darul Ehsan, Malaysia