3 IZA Discussion Papers
IZA Discussion Paper No. 7189
published in: Journal of Economic Behavior & Organization, 2016, 121, 77-98
IZA Discussion Paper No. 4387
published in: Journal of Quantitative Criminology, 2009, 25 (4), 391-417
IZA Discussion Paper No. 2710
published as 'Unemployment and gang crime: can prosperity backfire?' in: Economics of Governance, 2011, 12 (3), 259 - 273