This paper studies the design of enforcement policies to detect and deter harmful short-term activities committed by groups of injurers. With an ordered-leniency policy, the degree of leniency granted to an injurer who self-reports depends on his or her position in the self-reporting queue. By...

Police agencies devote vast resources to minimising the time that it takes them to attend the scene of a crime. Despite this, the long-standing consensus is that police response time has no meaningful effect on the likelihood of catching offenders. We revisit this question using a uniquely rich...

We describe the socio-economic characteristics of street-gang areas in London, explore gang formation dynamics, and analyse the spatial correlation between gangs and violent crime. Gang areas form in areas with higher unemployment, lower education, and a higher proportion of lone-parent...

Empirical connections between local anti-Muslim hate crimes and international jihadi terror attacks are studied. Based upon rich administrative data from Greater Manchester Police, event studies of ten terror attacks reveal an immediate big spike up in Islamophobic hate crimes and incidents when...

Empirical connections between local anti-Muslim hate crimes and international jihadi terror attacks are studied. Based upon rich administrative data from Greater Manchester Police, event studies of ten terror attacks reveal an immediate big spike up in Islamophobic hate crimes and incidents when...