Redrawing Hot Spots of Crime in Dallas, Texas

In this work we evaluate the predictive capability of identifying long term, micro place hot spots in Dallas, Texas. We create hot spots using a clustering algorithm, using law enforcement cost of responding to crime estimates as weights. Relative to the much larger current hot spot areas defined by the Dallas Police Department, our identified hot spots are much smaller (under 3 square miles), and capture crime cost at a higher density. We also show that the clustering algorithm captures a wide array of hot spot types; some one or two addresses, some street segments, and others an agglomeration of larger areas. This suggests identifying hot spots based on a specific unit of aggregation (e.g. addresses, street segments), may be less efficient than using a clustering technique in practice.

Automated summary

This study evaluates the predictive capability of identifying long-term, micro-place hot spots in Dallas, Texas using a clustering algorithm weighted by law enforcement cost. The identified hot spots are smaller and capture crime cost at a higher density compared to current hot spot areas defined by the Dallas Police Department. The algorithm captures a wide array of hot spot types, suggesting it may be more efficient than identifying hot spots based on specific unit of aggregation in practice.