1. Institute of Applied Economics, Faculty of Economics and Business, University of Debrecen, H-4032 Debrecen, Hungary
2. Department of Agricultural Economics, Corvinus University of Budapest, H-1093 Budapest, Hungary
3. ELKH-DE High-Tech Technologies for Sustainable Management Research Group, University of Debrecen, Boszormenyi Street 138, H-4032 Debrecen, Hungary