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Big brother: Good brother? CCTV systems and crime rates in Medellín-Colombia

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dc.description.abstract We investigate whether there is any effect on crime rates following the installation of public surveillance cameras in the city of Medellín-Colombia. To do so, we benefit from a quasi- experiment that took place in the installation of 366 cameras from April 2013 through October 2014. We highlight three main findings. First, there is a decline in total crime after the installation of the CCTV system. On average, year on year monthly changes in a total crime index are between 0.004 and 0.012 lower (i.e. between 33.3% and 100% of the average total crime index from January 2011 to October 2014 lower) in a street segment following the installation of one camera. This effect seems to be driven mainly by a decline in property crime. Second, we find no significant effects on apprehensions following the installation of surveillance cameras. These results may suggest the main channel for CCTV systems to deter criminals is through the subjective certainty of punishment. Third, we do not find crime displacement effects after the installation of CCTV systems. Instead, we find diffusion of benefits to the street segments surrounding installation sites when we restrict our sample to high crime places. This diffusion of benefits seems to be driven by a reduction in violent crime. en
dc.title Big brother: Good brother? CCTV systems and crime rates in Medellín-Colombia en
dc.contributor.author Gómez, Santiago
dc.contributor.author Mejía, Daniel
dc.contributor.author Tobón, Santiago
dc.date.accessioned 2015-10-14T03:40:23Z
dc.date.available 2015-10-14T03:40:23Z
dc.date.issued 2015-10-14
dc.identifier.uri http://hdl.handle.net/123456789/52981
lacea.language.supported en
dc.description Working paper
dc.language.iso en
dc.subject Crime Prevention
dc.subject CCTV
dc.subject Deterrence
dc.type Working Paper


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