Study of US mass shootings, firearms homicides suggests two-pronged policy approach

Over the past 30 years, mass shootings have fueled calls for changes in gun ownership and concealed carry legislation, but few studies have evaluated whether permissive gun policies deter mass shootings, and none have determined if their effects are the same on firearms homicides. A new study examined the impact of household gun ownership and concealed carry legislation on annual counts of mass shootings and homicides from firearms in the United States over the last 25 years. The study found that mass shootings occur disproportionately in states with higher levels of gun ownership, while rates of firearms homicides are higher in states with permissive concealed carry policies.

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