Kivisto AJ, et al. - Researchers assessed the link between gun ownership and domestic vs non-domestic homicide rates by victim sex in the United States. In order to model domestic (ie, family and intimate partners) and non-domestic firearm homicide as a function of state-level household firearm ownership, they merged various sources of state-level panel data, from 1990 through 2016, from each of the 50 states. They used a validated proxy measure to determine firearm ownership. From the Supplemental Homicide Reports of the Federal Bureau of Investigation's Uniform Crime Reports, they obtained homicide rates. Findings revealed an association of state-level firearm ownership rates with the rates of domestic but not non-domestic firearm homicide. A 64.6% higher incidence rate of domestic firearm homicide was reported in states in the top quartile of firearm ownership vs states in the lowest quartile; however, the incidence rates of nondomestic firearm homicide between states in the top quartile and states in the lowest quartile of firearm ownership were not significantly different.