alt Hacker NewsCrime rates reduced during the time stop and frisk was implemented. But when it was removed, crime rates remained low:
https://www.brennancenter.org/media/5670/download
Strongly suggests correlation but not causation.
Replies
cyberax • yesterday at 12:30 AM
Yes, crime decreases tend to stick.
Chicago started with similar conditions as NYC (30 murders per 100000 in 1991), but they didn't have no-nonsense mayors like Bloomberg and Rudy. So its murder rate now is still 5 times that of NYC.
Broken window policing and stop-and-frisk absolutely worked. Stop-and-frisk was found to be unconstitutional, but it also was highly effective.
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Or… criminals were caught and remained incarcerated leaving rates low. A large part of crime is committed by repeat offenders. Catch and imprison them and crime drops. This is well supported by data.