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Mapping Networks of Violence


A novel approach to both violence prevention and the measurement of propensity to violence is presented. The work is part of the evaluation of Cure Violence's (Ransford, Kane and Slutkin 2009; Slutkin 2012) implementation in NYC. Python libraries such as IPython, PySAL, Numpy, Basemap, Fiona, Shapely, Matplotlib, bNetworkX, Pandas and scikit-learn feature prominently in the work.


Violence remains a significant problem in New York City's poor neighborhoods. There were more than 9,000 gun homicides in 2008 (FBI, 2009) and the CDC (2012) reports that there were more than 71K non-fatal wounds in the US. One novel approach to the problem of violence is the Cure Violence Model (Ransford, Kane and Slutkin 2009; Slutkin 2012). Cure Violence treats violence as a disease passed between people in a social network. The program tries to use the same network to change how people who are prone to and have been the victims of violence react to stress and conflict. Cure Violence is viewed as having been successful in Chicago and shown promising in other cities (Skogin 2009, Wilson 2010, Webster 2009). All of these studies have used reported incidents of violence before and after the program to assess the efficacy. The NYC Council and Robert Wood Johnson Foundation have commited significant resoures to this approach. Both have retained the CUNY John Jay Research & Evaluation center to evaluate the efficacy. Our research adds to the literature by being the first to attempt to measure the change in the propensity to violence of people in the community. Novel preliminary research is presented on network cliques of respondents and the demographic, education, victimization experiences that constitute greatest risk. All of the analysis was conducted in Python libraries including IPython, PySAL, Numpy, Basemap, Fiona, Shapely, Matplotlib, bNetworkX, Pandas and scikit-learn.


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