53 IZA Discussion Papers
IZA Discussion Paper No. 1375
published in: Social Choice and Welfare, 2006, 27, 571-594
IZA Discussion Paper No. 1359
revised version published in: Journal of Public Economics, 2007, 91 (11-12), 2089-2112.
IZA Discussion Paper No. 1344
published in: European Economic Review, 2012, 56 (2), 216-232
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