4 IZA Discussion Papers
IZA Discussion Paper No. 12845
published in: Stata Journal, 2020, 13 (4), 812-843
IZA Discussion Paper No. 12362
IZA Discussion Paper No. 7268
published in: American Economic Journal: Applied Economics, 2016, 8 (1), 1-32
IZA Discussion Paper No. 5095
published in: Quantitative Economics, 2010, 1 (1), 1-46