As the mayor of New York City, Rudy Giuliani was a proponent of a controversial policing philosophy known as "broken windows." It calls for police to go after small crimes, in hopes of preventing bigger problems. At first, it appeared as if violent crime dropped in the neighborhoods where "broken windows" policing was in force. The statistics, however, told a different story. But the idea remains popular, despite evidence it likely had only modest effects. Copyright 2019 NPR. To see more, visit KELLY MCEVERS, HOST: President-elect Donald Trump has floated Rudy Giuliani, the former mayor of New York, as a possible cabinet pick. Giuliani is best known for using a tactic known as broken windows to police New York City in the 1990s, which basically means going after petty crimes in the hopes of preventing bigger ones. NPR's social science correspondent, Shankar Vedantam, looked at where the broken windows theory comes from and how it has evolved. SHANKAR VEDANTAM, BYLINE: Our story begins
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