Original Article Ulrich Koester Corresponding Author E-mail address: ukoester@ae.uni-kiel.de Christian‐Albrechts‐University Kiel, Germany, Leibniz Institute of Agricultural Development in Transition Economies, Halle/Saale Germany and Higher School of Economics, Moscow, Russia Search for more papers by this author Jens‐Peter Loy E-mail address: jploy@ae.uni-kiel.de Christian‐Albrechts‐University Kiel, Germany Search for more papers by this author Yanjun Ren E-mail address: Ren@iamo.de Leibniz...