1. Faculty of Economic Sciences, University of Warsaw, Długa 44/50, 00-241 Warszawa, Poland
2. State Nature Protection Institution “National Park “Biełavieskaja Pušča”, a/h Kamianiuki, 225063 Kamianiecki Rajon, Belarus
3. Department of Food and Resource Economics, University of Copenhagen, Rolighedsvej, 23 DK-1958 Frederiksberg C, Denmark
4. Department of Forestry and Wildlife Management, Inland Norway University of Applied Sciences, Campus Evenstad, N-2480 Koppang, Norway
5. Faculty of Forest Sciences, School for Forest Management, Swedish University of Agricultural Sciences, SE-730 21 Skinnskatteberg, Sweden