1. Department of Socioeconomics, Research Institute of Organic Agriculture (FiBL), Frick, Switzerland
2. Institute of Farm and Agribusiness Management, Justus-Liebig University of Giessen, Giessen, Germany
3. The Organic Research Centre, Cirencester, UK
4. FiBL Deutschland, Frankfurt Am Main, Germany
5. FiBL Europe, Bruxelles, Belgium
6. Department of Agricultural, Food and Environmental Sciences, D3A Università Politecnica Delle Marche, Ancona, Italy
7. Department of Crop Sciences, Research Institute of Organic Agriculture (FiBL), Frick, Switzerland