3. Across states, more guns = more homicide
Using a validated proxy for firearm ownership, we analyzed the relationship between firearm availability and homicide across 50 states over a ten-year period (1988-1997).
After controlling for poverty and urbanization, for every age group, people in states with many guns have elevated rates of homicide, particularly firearm homicide.
Miller, Matthew; Azrael, Deborah; Hemenway, David. Household firearm ownership levels and homicide rates across U.S. regions and states, 1988-1997. American Journal of Public Health. 2002; 92:1988-1993