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                            Library & Multimedia
 Measurement of Repeat Effects in Chicago's Criminal Social Network
NCJ Number
              251330
Journal

*Applied Computing and Informatics* Volume: 12 Issue: 2 Dated: July 2016 Pages: 154-160
Author(s)
          K.  Kump;
                        D. H. Alonso;
                        Y.  Yang;
                        J.  Candella;
                        J.  Lewin;
                        M. N. Wernick
Date Published

July 2016
Length
              7 pages
Annotation
              This study conducted a statistical analysis of repeat effects in arrest data for Chicago during the years 2003-2012.
Abstract
              The "near-repeat" effect is a well-known criminological phenomenon in which the occurrence of a crime incident gives rise to a temporary elevation of crime risk within close physical proximity to an initial incident. Adopting a social network perspective, the current study instead defines a "near repeat" in terms of geodesic distance within a criminal social network, rather than spatial distance. The study divided the arrest data into two sets (violent crimes and other crimes); and for each set, the study compared the distributions of time intervals between repeat incidents to theoretical distributions of time intervals between repeat incidents to theoretical distributions in which repeat incidents occur only by chance. Researchers first considered the case of the same arrestee participating in repeat incidents ("exact repeats") and then extended the analysis to evaluate repeat risks of those arrestees near one another in the social network. Repeat effects were observed that diminished as a function of geodesic distance and time interval; and typical time scales for repeat crimes in Chicago were estimated. (Publisher abstract modified)
      
  
          Additional Details
Grant Number(s)
        2011-IJ-CX-K014


  
  
        
  Agencies
        NIJ-Sponsored


  
  
        
  Publication Type
        Research (Applied/Empirical)
                                Report (Study/Research)
                                Report (Grant Sponsored)
                                Program/Project Description


  
  
        
  Award
        Chicago Police Predictive Policing Demonstration and Evaluation Project: Phase 2
    
  
  
Date Published: July 1, 2016
    
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