24 IZA Discussion Papers
IZA Discussion Paper No. 4570
published in Economica, 2010, 77 (305) , 1-19.
IZA Discussion Paper No. 3120
published in: Economic Inquiry, 2012, 50 (1), 39-61
IZA Discussion Paper No. 2968
published in: American Economic Review, 2009, 99 (1), 544–555
IZA Discussion Paper No. 2583
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