1. Doctoral School of Economic & Regional Sciences, Hungarian University of Agriculture and Life Sciences, 2100 Gödöllő, Hungary
2. Darbandikhan Technical Institute, Sulaimani Polytechnic University, Sulaimaniyah 70-236, Iraq
3. Management Department, Faculty of Economic and Business, Universitas Islam Negeri Syarif Hidayatullah Jakarta, Banten 15412, Indonesia
4. Institute of Rural Development and Sustainable Economy, Hungarian University of Agriculture and Life Sciences, 2100 Gödöllő, Hungary