44 IZA Discussion Papers
IZA Discussion Paper No. 3432
published in: Journal of Human Resources, 2012. 47(4), 913-950.
IZA Discussion Paper No. 890
IZA Discussion Paper No. 733
published in: Brussels Economic Review / Cahiers Economiques de Bruxelles, 2004, 47 (3), 387-408
IZA Discussion Paper No. 331
published in: Schmollers Jahrbuch: Zeitschrift für Wirtschafts- und Sozialwissenschaften / Journal of Applied Social Science Studies, 2002, 122 (2), 155-178