IZA Publications
IZA Discussion Paper No. 3749
revised version publishd in: Economics of Education Review, 2012, 31 (4), 363-375
IZA Discussion Paper No. 3037
published in: B.E. Journal of Economic Analysis and Policy: Advances in Economic Analysis and Policy, 2007, 7 (2), Article 7
IZA Discussion Paper No. 1775
IZA Discussion Paper No. 1631
IZA Discussion Paper No. 655
published in: Economics of Education Review, 2005, 24 (3), 251-262
IZA Discussion Paper No. 333
published in: Journal of the Royal Statistical Society, Series A. (Statistics in Society), 2004, 167 (1), 157-178
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