Institution: | 1.Department of Agricultural Economics and Rural Development, University of G?ttingen, Platz der G?ttinger Sieben 5, 37073, G?ttingen, Germany ;2.Faculty of Organic Agricultural Sciences, University of Kassel, Steinstra?e 19, 37213, Witzenhausen, Germany ;3.Faculty of Organic Agricultural Sciences, University of Kassel, Nordbahnhofstr. 1a, 37213, Witzenhausen, Germany ; |