1. School of Economics, Shandong University, Jinan, Shandong Province, China
2. Department of Business Administration, Faculty of Management Sciences, ILMA University, Karachi, Pakistan
3. Department of Economics, Gombe State University, Gombe, Nigeria
4. Department of Management and Business Administration, University of Pitesti, Pitesti, Romania
5. Esai Business School, Universidad Espíritu Santo, Samborondon, Ecuador
6. Faculty of Economics, Administrative and Social Sciences, Nisantasi University, Istanbul, Turkey