IZA-Publikationen
IZA Discussion Paper No. 4058
published in Journal of Labor Economics, 2013, 31 (3), 577-603.
IZA Discussion Paper No. 4013
published in: Economics of Education Review, 2009, 28 (6), 672-681
IZA Discussion Paper No. 4003
IZA Discussion Paper No. 2204
revised version published in: Journal of Public Economics, 2009, 93, 965-973
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