[1] Wageningen Univ, Forest & Nat Conservat Policy Grp, POB 47, NL-6700 AA Wageningen, Netherlands
[2] European Forest Inst, Yliopistokatu 6B, Joensuu 80100, Finland
[3] Katholieke Univ Leuven, Dept Earth & Environm Sci, Celestijnenlaan 200 E,Box 2411, B-3001 Leuven, Belgium
[4] Nat Resources Inst Finland, Latokartanonkaari 9, Helsinki 00790, Finland
[5] Univ Copenhagen, Dept Food & Resource Econ, Rolighedsvej 23, DK-1958 Frederiksberg C, Denmark
[6] Univ Nat Resources & Life Sci Vienna, Dept Econ & Social Sci, Inst Forest Environm & Nat Resource Policy, European Forest Inst Forest Policy Res Network, Feistmantelstr 4, A-1180 Vienna, Austria
[7] European Forest Inst, Pl Vereinten Nationen 7, D-53113 Bonn, Germany
[8] Forest Sci & Technol Ctr Catalonia, Carretera St Llorenc,Km 2, Solsona 25280, Spain
[9] Univ Padua, Dept Land Environm Agr & Forestry TESAF, Viale Univ 16, I-35020 Legnaro, Italy
[10] Univ Kassel, Fac Organ Agr Sci, Steinstr 19, D-37213 Witzenhausen, Germany
[11] Univ Gottingen, Dept Agr Econ & Rural Dev, Pl Gottinger Sieben 5, D-37073 Gottingen, Germany
[12] European Forest Inst, Mediterranean Facil, St Antoni Maria Claret 167, Barcelona 08025, Spain
[13] Univ Nat Resources & Life Sci Vienna, Inst Silviculture, Dept Forest & Soil Sci, Peter Jordanstr 82, A-1190 Vienna, Austria