3 IZA Discussion Papers
IZA Discussion Paper No. 8526
published in: International Encyclopedia of the Social & Behavioral Sciences, 2nd ed., 2015, Vol. 6
IZA Discussion Paper No. 5064
published in: B.E. Journal of Economic Analysis & Policy, 2012, 12 (1)
IZA Discussion Paper No. 2311
published in: Journal of Public Economics, 2010, 94 (1-2), 8-15