1. Origin for Sustainability, Av. Parc de la Rouvraie 20, 1018 Lausanne, Switzerland
2. Department of Economic Sciences, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 3-5 Manastur Street, 400372 Cluj-Napoca, Romania
3. Department of Agricultural Economics, Universidad de Cordoba, Campus de Rabanales, E-14071 Córdoba, Spain
4. Institute für Agrarwissenschaften, ETH Zürich, LFH B 4, Universitätstrasse 2, 8092 Zürich, Switzerland