1. Social Sciences Unit, ILVO (Flanders Research Institute for Agriculture, Fisheries and Food) Merelbeke Belgium
2. Department of Agricultural Economics, Faculty of Bioscience Engineering Ghent University Ghent Belgium
3. Knowledge, Technology and Innovation Group Wageningen University Wageningen The Netherlands
4. Departamento de Economía Agraria, Facultad de Ciencias Agrarias Universidad de Talca Talca Chile