23 IZA Discussion Papers
IZA Discussion Paper No. 1490
published in: Zeitschrift für ArbeitsmarktForschung / Journal for Labour Market Research, 2005, 38 (4), 475-492
IZA Discussion Paper No. 637
published in: Journal of Applied Social Sciences Studies, 2003, 123 (1), 199-208
IZA Discussion Paper No. 587
published in: Vierteljahrshefte zur Wirtschaftsforschung / Quarterly Journal of Economic Research, 2003, 72 (1), 51-67
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