Offender focus in the Philadelphia Policing Tactics Experiment

The particular paper under discussion is: Groff, ER, Ratcliffe, JH, Haberman, CP, Sorg, ET, Joyce, N and Taylor, RB (2015) Does what police do at hot spots matter? The Philadelphia Policing Tactics Experiment, Criminology, 53(1): 23-53. It is open access here: https://onlinelibrary.wiley.com/doi/full/10.1111/1745-9125.12055

There are some more results and details at this site: https://www.jerryratcliffe.net/philadelphia-predictive-polic