23 IZA Discussion Papers
IZA Discussion Paper No. 4318
published in: Journal of Development Economics, 2010, 91 (2), 323-335
IZA Discussion Paper No. 1272
published in: Comparative Economic Studies, 2007, 49 (1), 61-80
IZA Discussion Paper No. 302
published as "The Why, When and How of Immigration Amnesties" in: Journal of Population Economics, 2011, 24 (1), 285-316
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