1. Professor, Institute of Sectoral Economics and Methodology, Faculty of Economics and Business, University of Debrecen, Böszörményi str. 138, 4032 Debrecen, Hungary.
2. Associate Professor, Institute of Applied Informatics and Logistics, Faculty of Economics and Business, University of Debrecen, Böszörményi str. 138, 4032 Debrecen, Hungary.
3. Professor, Department of Agricultural Botany, Plant Physiology and Biotechnology, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Böszörményi str. 138, 4032 Debrecen, Hungary.
4. Professor, Department of Food Economics, Faculty of Food Science, Szent István University, Villányi str. 29-43, 1118 Budapest, Hungary.