85 IZA Discussion Papers
IZA Discussion Paper No. 1359
revised version published in: Journal of Public Economics, 2007, 91 (11-12), 2089-2112.
IZA Discussion Paper No. 1043
IZA Discussion Paper No. 514
IZA Discussion Paper No. 382
IZA Discussion Paper No. 26
published in: Journal of Economic Literature, 2000, 38 (1), 77-114
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