1. Doctoral School of Economic and Regional Sciences, Hungarian University of Agriculture and Life Science, 2100 Gödöllő, Hungary
2. Institute of Rural Development and Sustainable Economy, Hungarian University of Agriculture and Life Sciences, 2100 Gödöllő, Hungary
3. National School of Business and Management of Tangier, Abdelmalek Essaâdi University, Tangier 90000, Morocco
4. Faculty of Resources and Environmental Science, Hubei University, Wuhan 430062, China
5. Faculty of Economics and Business, John von Neumann University, 6000 Kecskemét, Hungary