3 IZA Discussion Papers
IZA Discussion Paper No. 10167
published in: Education Economics, 2017, 25 (6), 554-561
IZA Discussion Paper No. 4288
published in: Journal of Mathematical Sociology, 2010, 34 (1), 1-51
IZA Discussion Paper No. 3850
published in: Rationality and Society, 2009, 21 (1), 113-168