1. Vytautas Magnus University, K. Donelaičio str. 58, 44248 Kaunas, Lithuania
2. Department of Economic Policy, Faculty of Economic Science, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
3. Department of Agrotechnology and Agribusiness, Faculty of Agriculture and Forestry, University of Warmia and Mazury in Olsztyn, Oczapowskiego 8, 10-719 Olsztyn, Poland