Previous empirical studies have uncovered little evidence that police reduce crime, possibly due to simultaneity problems. This paper uses the timing of mayoral and gubernatorial elections as an instrument variable to identify a causal effect of police on crime. Increases in the size of police forces are shown to be disproportionately concentrated in mayoral and gubernatorial election years. Increases in police are shown to substantially reduce violent crime but have a smaller impact on property crime. The null hypothesis that the marginal social benefit of reduced crime equals the costs of hiring additional police cannot be rejected. Copyright 1997 by American Economic Association.
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Edward L. Glaeser & Bruce Sacerdote & Jose A. Scheinkman, 1995.
"Crime and Social Interactions,"
NBER Working Papers
5026, National Bureau of Economic Research, Inc.
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McCormick, Robert E & Tollison, Robert D, 1984.
"Crime on the Court,"
Journal of Political Economy,
University of Chicago Press, vol. 92(2), pages 223-35, April.
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