1. Department of Economics and Organization of Enterprises, Faculty of Economics, Institute of Economics and Finance, Warsaw University of Life Science SGGW-Warsaw, 02-787 Warszawa, Poland
2. Department of Tourism, Social Communication and Consulting, Faculty of Economics, Institute of Economics and Finance, Warsaw University of Life Science SGGW-Warsaw, 02-787 Warszawa, Poland
3. Department of Agrotechnology and Agribusiness, Faculty Agriculture and Forestry, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland