1. School of Management and Economics, University of Electronic Science and Technology of China, Chengdu, China & Center of West African Studies, University of Electronic Science and Technology of China, Chengdu, China & All Nations University Business School, All Nation University College, Koforidua, Ghana
2. School of Management and Economics, University of Electronic Science and Technology of China, Chengdu, China & Center of West African Studies, University of Electronic Science and Technology of China, Chengdu, China
3. Finance and Economics Department, Gansu Agricultural University, China