7 IZA Discussion Papers
IZA Discussion Paper No. 15923
IZA Discussion Paper No. 15725
IZA Discussion Paper No. 11967
IZA Discussion Paper No. 9749
published in: Applied Economics, 2016, 58 (2), 107-120
IZA Discussion Paper No. 7386
IZA Discussion Paper No. 1538
published in: Economic Journal, 2008, 118, 1596-1620
IZA Discussion Paper No. 1502
updated version published as ' "Hard Workers" and Labor Restrictions' in: Journal of Population Economics, 2012, 25 (2), 469 - 494