2 IZA Discussion Papers
IZA Discussion Paper No. 7285
published in: Transfer: European Review of Labor and Research, 2013, 19 (3), 365-380
IZA Discussion Paper No. 6485
published in: A. F. Constant, K. F. Zimmermann (eds.), International Handbook on the Economics of Migration, Edward Elgar 2013, Cheltenham, UK, and Northampton, pp. 137-152