7 IZA Discussion Papers
IZA Discussion Paper No. 14870
IZA Discussion Paper No. 9912
IZA Discussion Paper No. 7418
IZA Discussion Paper No. 6022
IZA Discussion Paper No. 4644
published in: Solomon W. Polachek, Konstantinos Tatsiramos (eds.), 2011, Research in Labor Economics (Research in Labor Economics, Volume 33), Emerald Group Publishing Limited, 307-339
IZA Discussion Paper No. 4337
IZA Discussion Paper No. 3491