1. Department of Economics, Faculty of Operation and Economics of Transport and Communications, University of Zilina, Zilina, Slovakia
2. Faculty of Business, Pan-European University, Prague, Czech Republic
3. Department of Business Administration, Faculty of Management and Economics, Tomas Bata University in Zlín, Zlín, Czech Republic
4. Department of Market of Consumption, Faculty of Economic Sciences, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland; Brno University of Technology, Brno, Czech Republic