1. Kurgan State Agricultural Academy, Ketovo, Kurgan Region, Russia
2. Department of Agricultural Economics, Christian-Albrechts-Universität zu Kiel, Kiel, Germany
3. Department of Economics, Swedish University of Agricultural Sciences, Uppsala, Sweden
4. Department of External Environment for Agriculture and Policy Analysis, Leibniz Institute of Agricultural Development in Transition Economies (IAMO), Halle (Saale), Germany