22 IZA Discussion Papers
IZA Discussion Paper No. 3313
published in: Acemoglu, D. et al. (eds.): NBER Macroeconomics Annual 2008, NBER, Cambridge, MA , 2009, 231-276
IZA Discussion Paper No. 2684
published as 'How many hours do you have to work to be integrated?' in: International Migration, 2012, 50 (s1), e117 - e131
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