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...

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 Sport Intelligence and...

In this paper, we introduce a model of hooliganism to study how different types of policing can be expected to affect violence and the number of hooligans in violent supporter clubs. Hooligans differ in their preferred level of fighting, and obtain utility also from social identity that...

In this paper, we study how unemployment affects gang crime. We examine a model of criminal gangs and suggest that a substitution effect between petty crime and severe crime is at work. In the model, non-monetary valuation of gang membership is private knowledge. Thus, the leaders face a...

How do surveillance cameras affect unruly spectator behavior? I examine this question using a natural experiment from the Swedish soccer league. Stadiums in Sweden introduced surveillance cameras at different points in time during the years 2000 and 2001. I exploit the exogenous variation that...

Empirical evidence shows that competition among firms generates steep incentives inside firms. Incentive pay stimulates productive investments but may generate inefficient rent-seeking investments. I show that competition reduces firms’ profits and thereby the inefficient investments, which...

In this paper, we introduce a model of hooliganism to study how different types of policing can be expected to affect violence and the number of hooligans in violent supporter clubs. Hooligans differ in their preferred level of fighting, and obtain utility also from social identity that...

Democratic societies are challenged by various violent and organized groups, be they terrorists, gangs or organized hooligans. In exchange for offering an identity, leaders in such groups typically require members to be violent. We introduce a simple model to capture these stylized facts, and...

Empirical evidence reveals that unemployment tends to increase property crime but that it has no effect on violent crime. To explain these facts, we examine a model of criminal gangs and suggest that there is a substitution effect between property crime and violent crime at work. In the model,...

Recent empirical work shows that judicial dependence can explain high levels of corruption. This paper examines how the dependence of judiciaries influences corruption at different levels of the government in a model where the central government, low-level officials, and the judiciary are...