3 IZA Discussion Papers
IZA Discussion Paper No. 2050
IZA Discussion Paper No. 770
published in: Manchester School, 2006, 74(6), 701-710
IZA Discussion Paper No. 445
published in: Gil S. Epstein and Ira N. Gang (eds.): Migration and Culture, Emerald Publishing, Bingley, 2010, 25-44