6 IZA Discussion Papers
IZA Discussion Paper No. 16896
IZA Discussion Paper No. 16680
IZA Discussion Paper No. 15623
IZA Discussion Paper No. 12383
IZA Discussion Paper No. 10951
published in: Journal of Health Economics, 2019, 67, 102213
IZA Discussion Paper No. 5046
published in: Applied Economics, 2012, 44 (16), 2111 - 2131