248 IZA Discussion Papers
IZA Discussion Paper No. 508
published in: Econometrica, 2002, 70 (2), 2078-2091
IZA Discussion Paper No. 451
published in: Economics of Education Review, 2003, 22 (5), 469-480
IZA Discussion Paper No. 450
published in: Economic Record, 2003, 79 (245), 165-181
IZA Discussion Paper No. 272
IZA Discussion Paper No. 262
IZA Discussion Paper No. 160
published in: Research in Labor Economics, 2001, 20, 191-215
IZA Discussion Paper No. 78
published in: Empirical Economics, 2005, 30 (1), 1-22
IZA Discussion Paper No. 60
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