57 IZA Discussion Papers
IZA Discussion Paper No. 1268
published in: CESifo Economic Studies, 2005, 51 (1), 47-75
IZA Discussion Paper No. 1212
IZA Discussion Paper No. 1174
published in: Journal of Applied Econometrics, 2010, 5 (7), 1073-1099
IZA Discussion Paper No. 1132
published in: Oxford Bulletin of Economics and Statistics, 2010, 72 (3), 263-280
IZA Discussion Paper No. 1058
IZA Discussion Paper No. 965
published in: American Economic Review, 2007, 97 (4), 1419 - 1431
IZA Discussion Paper No. 283
published in: Economics Bulletin, 2007, 15(7), 1-8.
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