Foot Patrol in Violent Crime Hot Spots: Longitudinal Impacts of Deterrence and Post-Treatment Effects of Displacement
This study revisited the Philadelphia Foot Patrol Experiment and explored the longitudinal deterrent effects of foot patrol in violent crime hot spots using Sherman’s concepts of initial and residual deterrence decay as a theoretical framework. It also explored whether the displacement uncovered during the initial evaluation decayed after the experiment ended. Multi-level growth curve models revealed that beats staffed for 22 weeks had a decaying deterrent effect during the course of the experiment whereas those staffed for 12 weeks did not.