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 other activities following the 9/11 terrorist attack in September 2001 and the Tsunami catastrophe in December 2004. Difference-in-difference analysis reveals that Stockholm-related hooligan violence increased dramatically during these periods.
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Paper provided by CESifo GmbH in its series CESifo Working Paper Series with number
CESifo Working Paper No. 1882.
Find related papers by JEL classification: K10 - Law and Economics - - Basic Areas of Law - - - General (Constitutional Law) K42 - Law and Economics - - Legal Procedure, the Legal System, and Illegal Behavior - - - Illegal Behavior and the Enforcement of Law
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