Are We Underestimating the Crime Prevention Outcomes of Community Policing? The Importance of Crime Reporting Sensitivity Bias
By David Weisburd, David B. Wilson, Charlotte Gill, Kiseong Kuen, and Taryn Zastrow
One of the key policing innovations of the last three decades has been community-oriented policing. It is particularly important because it is one of the only proactive policing approaches that consistently improves citizen evaluations of the police. At the same time, a series of reviews have concluded that there is not persuasive evidence that community policing reduces crime. In this paper we argue that these conclusions are likely flawed because of what we term crime reporting sensitivity (CRS) bias. CRS bias occurs because community policing leads to more cooperation with the police and subsequently increased crime reporting. Such increased crime reporting bias adjusts crime prevention outcomes of community policing downward. We illustrate this process by reanalyzing data from the Brooklyn Park ACT Experiment (Weisburd et al., 2021). We begin by showing the specific crime categories that contribute most to CRS bias. We then use a difference-in-differences panel regression approach to assess whether the experimental intervention in Brooklyn Park led to significant CRS bias. Finally, we use bounded estimates from the Brooklyn Park Experiment to adjust meta-analytic results from prior community policing studies to examine whether the conclusion that community policing does not impact on crime would need to be revisited if CRS bias was accounted for. We find that adjusted estimates tell a very different, more positive, story about community policing, suggesting that future studies should recognize and adjust for CRS bias, or identify other measures not influenced by this mechanism.