685 IZA Discussion Papers
IZA Discussion Paper No. 176
published in: Schmollers Jahrbuch: Zeitschrift für Wirtschafts- und Sozialwissenschaften /Journal of Applied Social Science Studies, 2001, 121(3), 285-312
IZA Discussion Paper No. 98
IZA Discussion Paper No. 86
IZA Discussion Paper No. 69
revised version published in: Journal of Economic and Social Measurement, 2007, 32 (1), 15-22
IZA Discussion Paper No. 40
published in: Klaus F. Zimmermann (ed.): European Migration - What Do We Know?, Oxford University Press, Oxford, 2005