5 IZA Discussion Papers
IZA Discussion Paper No. 12564
IZA Discussion Paper No. 7765
published in: Economics Letters, 2014, 122 (2), 276–284
IZA Discussion Paper No. 4683
published in: B.E. Journal of Macroeconomics (Advances), 2015, 15 (2), 467-508
IZA Discussion Paper No. 3788
IZA Discussion Paper No. 375