The Effect of Police Response Time on Crime Detection

Jordi Blanes i Vidal, Tom Kirchmaier

    Publikation: Working paperForskning

    Abstrakt

    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 dataset from the
    Greater Manchester Police. To identify causal effects, we exploit discontinuities in distance to the response station across locations next to each other, but on different sides of division boundaries. Contrary to previous evidence, we find large and strongly significant effects: in our preferred estimate, a 10% increase in response time leads to a 4.6 percentage points decrease in the likelihood of detection. A faster response time also decreases the number of days that it takes for the police to detect a crime, conditional on eventual detection. We find stronger effects for thefts than for violent offenses, although the effects are large for every type of crime. We identify the higher likelihood that a suspect will be named by a victim or witness as an important mechanism though which response time makes a difference.
    OriginalsprogEngelsk
    Udgivelses stedLondon
    UdgiverCentre for Economic Performance (CEP), London School of Economics and Political Science
    Antal sider47
    StatusUdgivet - okt. 2015
    NavnCEP Discussion Paper
    Nummer1376

    Emneord

    • Police crime
    • Organisational performance

    Citationsformater

    Blanes i Vidal, J., & Kirchmaier, T. (2015). The Effect of Police Response Time on Crime Detection. London: Centre for Economic Performance (CEP), London School of Economics and Political Science. CEP Discussion Paper, Nr. 1376