Citation: S.E. Costanza and Ronald Helms. "Street Gangs and Aggregate Homicides: An Analysis of Effects During the 1990s Violent Crime Peak" Homicide Studies 16(3): 280-307. June 11, 2012. Online. June 12, 2013.

City-level violence escalated and peaked during the 1990’s, which possibly caused a similarly high homicide rate. Many studies have linked gang activity with higher rates of violent crimes. This study uses empirical research to link gang violence with homicide rates. A majority of studies only looked at the micro level of gang attribute violence and homicide correlation. Costanza focused on the macro level using 154 U.S. cities to determine if active gangs directly correlated with homicide rates. Criminologist in the 1990’s paid special attention to the structural factors contributing to the all-time peak of violence in the young men demographic. Researchers have remained focused on the patterns of homicide within the context of the violence peak in the 90’s. Costanza chose to “focus explicitly on the plausible empirical link between street gangs and homicide offending in central cities throughout the Unites States”. The factors that lead to an increase in homicide include the drug market, guns, and gang presence. Recent studies have shown that it is a combination of factors, as opposed to just financial opportunity, that lead to gang membership. The reason for the lack of macro level studies of gang violence has been due to the lack of gang related studies. Maxson in 1992, published a study that systematically documented the number of gangs and gang members. This new data has presented the opportunity for more macro level research of gang related violence. Throughout the history of gang related organizations, the media and academia have assumed a correlation between street gangs and violence. Even though this pattern has been alluded to many