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The Effect Of Private Police On Crime: Evidence From A Geographic Regression Discontinuity Design, John M. Macdonald, Jonathan Klick, Ben Grunwald
The Effect Of Private Police On Crime: Evidence From A Geographic Regression Discontinuity Design, John M. Macdonald, Jonathan Klick, Ben Grunwald
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Research demonstrates that police reduce crime. The implication of this research for investment in a particular form of extra police services, those provided by private institutions, has not been rigorously examined. We capitalize on the discontinuity in police force size at the geographic boundary of a private university police department to estimate the effect of the extra police services on crime. Extra police provided by the university generate approximately 45-60 percent fewer crimes in the surrounding neighborhood. These effects appear to be similar to other estimates in the literature.
Mobile Phones And Crime Deterrence: An Underappreciated Link, Jonathan Klick, John Macdonald, Thomas Stratmann
Mobile Phones And Crime Deterrence: An Underappreciated Link, Jonathan Klick, John Macdonald, Thomas Stratmann
All Faculty Scholarship
Between 1991 and 2001, crime rates dropped by about a third across all crime categories. We suggest that the introduction and growth of mobile phone technology may have contributed to the crime decline in the 1990s, specifically in the areas of rape and assault. Given that mobile phones increase surveillance and the risks of apprehension when committing crimes against strangers, an expansion of this technology would increase the costs of crime as perceived by forward-looking criminals. We use the available mobile phone data to show that there is a strongly negative association between mobile phones and violent crimes, although data …