A full description of the national study on which this Bulletin is based is available in Maxson, Woods, and Klein (1995), which contains an earlier presentation of some portions of this report. Support was provided by the National Institute of Justice, grant #91-IJ-CX-K004. Malcolm Klein was co-principal investigator ofthe study and research assistance was provided by Kristi Woods, Lea Cunningham, and Karen Sternheimer. The author gratefully acknowledges the participation of personnel in hundreds of police departments and community agencies, along with several dozen gangmembers. Useful comments onan earlier draft were provided by Malcolm Klein, Walter Miller, James Howell, and Scott Decker.
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