5 IZA Discussion Papers
IZA Discussion Paper No. 10136
IZA Discussion Paper No. 5230
published in: The World Bank (ed.). Development Challenges in a Post-Crisis World, 2012
IZA Discussion Paper No. 5182
IZA Discussion Paper No. 3654
published in: Brookings Papers on Economic Activity, 2008, 1, 1-87
IZA Discussion Paper No. 1328
published in: Journal of Health Economics, 2007, 26 (2), 213-232