1. “Ihrig Károly” Doctoral School of Management and Business, University of Debrecen, H-4032 Debrecen, Hungary
2. Institute of Economics, Faculty of Economics and Business, University of Debrecen, H-4032 Debrecen, Hungary
3. Institute of World Economy and International Relations, Faculty of Economics and Business, University of Debrecen, H-4032 Debrecen, Hungary
4. Institute of Rural Development and Functional Management, Faculty of Economics and Business, University of Debrecen, H-4032 Debrecen, Hungary