5 IZA Discussion Papers
IZA Discussion Paper No. 10362
Published in Journal of Economic Literature, Vol 55, December 2017, 1346-1434.
IZA Discussion Paper No. 8067
IZA Discussion Paper No. 6215
published in: Annual Review of Economics, 2012, 4, 339-372
IZA Discussion Paper No. 3421
published in: Quarterly Journal of Economics, 2009, 124(4), 1541-1591