Police crackdowns on illegal gun carrying: a systematic review of their impact on gun crime

@article{Koper2006PoliceCO,
  title={Police crackdowns on illegal gun carrying: a systematic review of their impact on gun crime},
  author={Christopher S. Koper and Evan Mayo-Wilson},
  journal={Journal of Experimental Criminology},
  year={2006},
  volume={2},
  pages={227-261}
}
This paper presents a systematic review of the impact of police strategies to reduce illegal possession and carrying of firearms on gun crime, including directed patrols, monitoring of probationers and parolees, weapon reporting hotlines, and others. Four studies met the inclusion criteria, reporting a total of seven nonrandomized tests of directed patrols focused on gun carrying in three American cities (five tests) and two Colombian cities (two tests). Six of the seven tests (not all of which… 
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