Philadelphia Predictive Policing Experiment
- Jerry Ratcliffe
- Oct 8, 2025
- 1 min read
Here is a three-page summary of the experiment from Police Chief magazine.
For academics, the full published results can be found here: Ratcliffe, JH, Taylor, RB, Askey, AP, Thomas, K, Grasso, J, Bethel, K, Fisher, R, Koehnlein, J (2021) The Philadelphia Predictive Policing Experiment. Journal of Experimental Criminology, 17(1), 15-41.
There is also another more quantitative exploration of the district level results here: Taylor, RB, Ratcliffe, JH and Fisher, R (2020) Was the Pope to blame? Statistical powerlessness and the predictive policing of micro-scale randomized control trials, Criminology & Public Policy, 19(3): 965-996.
Finally, we also looked at the officer perspective in Ratcliffe, JH, Taylor, RB, & Fisher, R (2020) Conflicts and congruencies between predictive policing and the patrol officer’s craft, Policing and Society, 30(6): 639–655.

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