1. Wienand Kölle (email: wienand.koelle@uni‐goettingen.de) and Matthias Buchholz are Research Scholars and Oliver Musshoff is Professor with the Department of Agricultural Economics and Rural Development Georg‐August‐University Göttingen Platz der Göttinger Sieben 5 GöttingenD‐37073Germany
2. Andrea Martínez Salgueiro is Research Scholar at the Department of Business Universitat Autònoma de Barcelona (UAB) Building B, Campus UAB, Bellaterra, Cerdanyola del Vallès Barcelona08193Spain