23 IZA Discussion Papers
IZA Discussion Paper No. 2980
published in: Economic Journal, 119 (535), 2009, F66 - F100
IZA Discussion Paper No. 2610
IZA Discussion Paper No. 762
revised version published as ''Evaluationg the Cost-Effectiveness of In-Work Benefits: A Simulation Study for Switzerland' in: German Economic Review, 2007, 8 (4), 447 - 467
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