1. Osteuropa-Institut, Freie Universität, Berlin, Germany
2. Leibniz Institute for East and Southeast European Studies (IOS), Regensburg, Germany
3. CERGE-EI, a joint workplace of Charles University and the Czech Academy of Sciences, Prague, Czech Republic
4. Institute of Labor Economics (IZA), Bonn, Germany
5. Global Labor Organization (GLO), Essen, Germany