1. Department of Economics, Alberta College, Riga, Latvia.
2. International Business College, Dongbei University of Finance and Economics, Dalian, China.
3. Current affiliation: School of Entrepreneurship and Business, Häme University of Applied Sciences Ltd. (HAMK), Valkeakoski, Finland.
4. Department of Finance and Banking, Begum Rokeya University, Rangpur, Bangladesh.