How Do NYPD Officers Respond to Terror Threats?
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Using data from the New York City Police Department's Stop-and-Frisk program, we evaluate the impact of a specific terrorist attack threat from Al Qaeda on policing behavior in New York City. We find that after the Department of Homeland Security raised the alert level in response to this threat,
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美国国家经济研究局创建时间：
2019-11-01
