2003 and earlier
CDC National Injury Social Ecological Model, 2002 CDC uses a four-level social-ecological model to better understand violence and the effect of potential prevention strategies (Dahlberg & Krug 2002). This model considers the complex interplay between individual, relationship, community, and societal factors.
URL: http://www.cdc.gov/ViolencePrevention/overview/social-ecologicalmodel.html