1. Senior Researcher, Department of Structural Development of Farms and Rural Areas, Leibniz Institute of Agricultural Development in Transition Economies (IAMO), Theodor-Lieser-Strasse 2, 06120 Halle (Saale), Germany.
2. Professor Emeritus, Division of Applied Social Sciences, College of Agriculture, Food & Natural Resources, University of Missouri, Mumford Hall, Columbia, MO 65211, USA.
3. Professor, Department of Structural Development of Farms and Rural Areas, Leibniz Institute of Agricultural Development in Transition Economies (IAMO), Theodor-Lieser-Strasse 2, 06120 Halle (Saale), Germany.