How gun laws affect firearm-related homicides and suicides

The stronger local guns are, the less likely people are to die from homicides or suicides by gun. And those benefits may be felt across state lines.

That’s the conclusion of a study published Monday in JAMA Internal Medicine. The study examined county and state-level gun laws in 3,108 counties and the 48 contiguous states, and compared them with firearm-related death rates between 2010 and 2014.

“Strengthening state firearm policies may prevent firearm suicide and homicide, with benefits that may extend beyond state lines,” the study concluded.

Researchers analyzed local laws and assigned scores of 0 to 12 (from least to most restrictive) to states and counties.

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