4 IZA Discussion Papers
IZA Discussion Paper No. 14740
IZA Discussion Paper No. 2647
published in: Journal of Economic Psychology, 2009, 30 (5), 782-792
IZA Discussion Paper No. 619
published in: Industrial and Labor Relations Review, 2004, 57(3), 443-461
IZA Discussion Paper No. 379
published in: Journal of Economic Behavior and Organization, 2006, 61 (1), 55-80