"The proliferation of youth gangs since 1980 has fueled the public's fear and magnified possible misconceptions about youth gangs. To address the mounting concern about youth gangs, the Office of Juvenile Justice and Delinquency Prevention's (OJJDP's) 'Youth Gang Series' delves into many of the key issues related to youth gangs. The series considers issues such as gang migration, gang growth, female involvement with gangs, homicide, drugs and violence, and the needs of communities and youth who live in the presence of youth gangs. [...] This Bulletin explores how key terms such as 'gang,' 'gang proliferation,' and 'gang migration' are defined; how and whether gang migration affects gang proliferation; and trends reported in research literature. This Bulletin is based in part on work supported by the National Institute of Justice (NIJ) and an article previously published in the National Institute of Justice Journal (Maxson, Woods, and Klein, 1996)."
National Criminal Justice Reference Service: http://www.ncjrs.gov/