• AAS

The Deterrent Effect Of Public Surveillance Cameras On Crime


AUTHORS

Gomez, Mejia, And Tobon (2017)

STUDY OBJECTIVE

This paper investigates the effect of the installation of public surveillance cameras on deterrent crime in Medellin, Colombia.

TREATMENT

587 places in Medellin, Colombia where new public surveillances cameras were installed.

CONTROL

No cameras were installed.

Crime and arrest data from 2013 were compared to data collected during the 2 year period after the cameras were installed.

MAIN RESULTS

1) There was a statistically significant decline in total crime after the installation of the cameras. On average, total crime reports are 23.5% lower within the coverage zone following the installation of a camera relative to the average baseline level of crime reports.

2) There was a statistically significant decline in arrests. The magnitude of this effect is 31.5% relative to the average baseline level of arrests, suggesting that these results suggest that the effect of the surveillance cameras on reported crime are driven by a deterrent effect on potential offenders.

3) There are no crime spillover effects after the installation of the cameras, nor are there any diffusion of benefits to surrounding places.

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