The NYC Department of Investigation part of the Office of the Inspector General for the NYPD recently issued an "Analysis of Quality-of-Life Summonses, Quality-of-life misdemeanor arrests and felony crimes in New York City from 2010-2015.''
Some of the key findings include:
-Blacks and Latino residents are targeted at higher proportions for quality of life enforcement compared to white residents.
-There is no evidence to suggest that crime control can be directly attributed to issuing quality of life summonses and making misdemeanor arrests.
See also this article regarding Broken Windows and public spaces: