1. Institute of Economics and Finance, Warsaw University of Life Sciences—SGGW, Nowoursynowska 166, 02-787 Warsaw, Poland
2. Faculty of Management, University of Warsaw, Szturmowa 1/3, 02-678 Warsaw, Poland
3. Ruralia Institute, University of Helsinki, Kampusranta 9 C, 60320 Seinäjoki, Finland
4. Institute of Economics and Finance, University of Szczecin, Mickiewicza 64, 71-101 Szczecin, Poland