The results show that after controlling for other variables, several of which had significant impacts on youth homicide, the density of alcohol outlets had a significant positive effect on youth homicide for both age groups studied. Such positive effects have been found for adults in national and neighborhood studies, but this is the first study to report such results for teens and young adults. The findings suggest that reduction in the density of retail alcohol outlets in a city may be an effective measure for reducing violent crime among these age groups. The time period covered by the study was significant because of the dramatic increases and declines in youth homicide during this period. The findings also showed that others factors - such as structural disadvantage, narcotic drug activity, firearm availability, and gang influence - had significant and theoretically predicted effects on youth homicide in both age groups. Data on the availability of alcohol for each city were obtained from the U.S. Census of Economic Activity, which is conducted every 5 years. These data were used to construct an annual time series for the density of retail alcohol outlets in each city. Data on social and economic characteristics, drug use, street-gang activity, and gun availability were used as time series measures. 3 tables, 75 references, and an appended listing of cities included in the study