1. Institute of Social Sciences in Agriculture, Societal Transition and Agriculture (430b), University of Hohenheim, Stuttgart, Germany
2. Independent Researcher, Büro für Umweltethik, Tübingen, Germany
3. Faculty of Organic Agricultural Sciences, University of Kassel, Kassel, Germany
4. Department of Agricultural Economics and Rural Development, Georg-August-Universität, Göttingen, Germany