3 IZA Discussion Papers
IZA Discussion Paper No. 5638
published in: Journal of Business & Economic Studies, 2013, 31 (3), 300 - 314
IZA Discussion Paper No. 3298
published in: Journal of Money, Credit and Banking, 2009, 41 (7), 1481-1502
IZA Discussion Paper No. 2265
published: Journal of Economic Surveys, 2010, 24 (1), 1-51