55 IZA Discussion Papers
IZA Discussion Paper No. 4240
published in: Journal of Health Economics, 2011, 30 (2), 277-292
IZA Discussion Paper No. 3960
published in: Journal of European Economic Association, 2009, 7 (2–3), 1–12
IZA Discussion Paper No. 3749
revised version publishd in: Economics of Education Review, 2012, 31 (4), 363-375
IZA Discussion Paper No. 3677
published in: Labour, 2009, 23 (Special Issue), 139 - 175
IZA Discussion Paper No. 466
published in: Health Economics, 2005, 14 (11), 1087-1101
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