This paper isolates the causal effect of policing on group violence, using unique panel data on self-reported crime by soccer and ice hockey hooligans. The problem of reverse causality from violence to policing is solved by two drastic reallocations of the Stockholm Supporter Police unit to...

This paper studies how surveillance cameras affect unruly spectator behaviour in the highest Swedish soccer league. Swedish stadiums introduced surveillance cameras at different points in time during the years 2000 and 2001. I exploit the exogenous variation that occurred due to differences...

We estimate the causal effects of parental incarceration on children's short- and long-run out-comes using administrative data from Sweden. Our empirical strategy exploits exogenous varia-tion in parental incarceration from the random assignment of criminal defendants to judges with different...