Did the NYPD's Operation Impact surge work?

The study cited is MacDonald J, Fagan J, Geller A (2016) The Effects of Local Police Surges on Crime and Arrests in New York City. PLoS ONE 11(6): e0157223. https://doi.org/10.1371/journal.pone.0157223

The research study is open access so you can read the entire research report here.