26 IZA Discussion Papers
IZA Discussion Paper No. 4969
revised version published in: De Economist, 2012, 160 (4), 339-355
IZA Discussion Paper No. 4688
published in: World Bank Economic Review, 2011, 25 (1), 77-104
IZA Discussion Paper No. 3162
IZA Discussion Paper No. 2923
published in: Education Finance and Policy, 2008, 3 (3), 316-338
IZA Discussion Paper No. 2843
published in: American Economic Review, 2011, 101 (4), 1274-1311
IZA Discussion Paper No. 2662
发表于:工业和Labor Relations Review, 2007, 61(1), 90-107
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