3 IZA Discussion Papers
IZA Discussion Paper No. 11560
published in: Journal of Econometric Methods, 2019, 8 (1), 20160007.
IZA Discussion Paper No. 9990
published in: American Economic Review, 2018, 108 (8), 2277 - 2304
IZA Discussion Paper No. 4533
published in: Journal of Public Economics, 2010, 94 (1-2), 114-128