3 IZA Discussion Papers
IZA Discussion Paper No. 14172
published in: Journal of Applied Econometrics, 2021, 36 (4), 474 - 483
IZA Discussion Paper No. 13196
published in: Economics Letters, 2020, 192, 109253
IZA Discussion Paper No. 614
published in: Scottish Journal of Political Economy, 2005, 52 (2), 177-193