Kansas_City_preventive_patrol_experiment
The Kansas City preventive patrol experiment was a landmark experiment carried out between 1972 and 1973 by the Kansas City Police Department of Kansas City, Missouri and the Police Foundation, an independent nonprofit research organization[1] today known as the National Policing Institute.[2] It was designed to test the assumption that the presence (or potential presence) of police officers in marked cars reduced the likelihood of a crime being committed. It was the first study to demonstrate that research into the effectiveness of different policing styles could be carried out responsibly and safely.
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