6 IZA Discussion Papers
IZA Discussion Paper No. 15198
IZA Discussion Paper No. 13541
IZA Discussion Paper No. 13309
IZA Discussion Paper No. 10918
short version published as 'Social Insurance and Health' in: Baltagi, B. H. and Moscone, F. (eds.), Health Econometrics, Emerald Publishing, 1st ed., 2018.
IZA Discussion Paper No. 8047
published in: Labour Economics, 2014, 30, 88-97
IZA Discussion Paper No. 2458
published in: Steven N. Durlauf and Lawrence E. Blume (eds.), The New Palgrave Dictionary of Economics, Second Edition, Palgrave MacMillan: 2008, 609-642