5 IZA Discussion Papers
IZA Discussion Paper No. 3201
revised version published in: Eastern Economic Journal, 2011, 37, 344-366
IZA Discussion Paper No. 2033
published in: Journal of Population Economics, 2010, 21 (1), 323-351
IZA Discussion Paper No. 2025
revised version published in: Research in Labor Economics, 2006, 25, 165-198
IZA Discussion Paper No. 1932
updated and extended version published in: OECD (2007), Benefits and Wages: OECD Indicators
IZA Discussion Paper No. 1445
revised version published in: Labour Economics, 2006, 13 (6), 667-693