Analyzing the Displacement Effects of Nuisance Abatement: A Pre/Post Hot Spot Analysis in Chicago

Daniel Higgins, Chicago Police Department
James R. Coldren, Jr., University of Illinois at Chicago

ABSTRACT
The authors recently completed an evaluation of the Chicago Police Department's nuisance abatement program and found a positive effect using a quasi-experimental evaluation design. They reported reduced levels of offenses and arrests at multi-unit dwellings identified as 'gang and drug houses', as well as reduced levels in one-half block catchment areas surrounding the specific addresses. Further analysis of the data, using a spatial analysis methodology to identify 'hot spots' developed by the Illinois Criminal Justice Information Authority, provides evidence of a displacement effect. This paper presents the hot spot analysis and discusses the need to account for displacement in community policing and nuisance abatement evaluations.

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Updated 05/20/2006