Our Work

A list of our current research published using information from our firearm laws database.

Broadening the Perspective on Gun Violence: An Examination of the Firearms Industry, 1990-2015

American Journal of Preventive Medicine, November 2017

This article reports trends in domestic firearm production during the period 1990-2015. The major finding is that there was a dramatic increase in firearms production starting in 2005, driven by a rise in large caliber pistol and rifle production.

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Easiness of Legal Access to Concealed Firearm Permits and Homicide Rates in the United States

American Journal of Public Health, November 2017

This article examines the relationship between state-level concealed handgun permitting policies and homicide rates during the period 1991-2015. It reports that compared to “may issue” laws, “shall issue” laws are associated with significantly higher rates of overall, firearm-related, and handgun-related homicide.

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State Intimate Partner Violence-Related Firearm Laws and Intimate Partner Homicide Rates in the United States, 1991 to 2015

Annals of Internal Medicine, October 2017

This article reports that state laws which require people subject to domestic violence restraining orders to relinquish firearms in their possession are associated with significantly lower rates of intimate partner violence.

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Firearm-Related Laws in All 50 US States, 1991-2016

American Journal of Public Health, July 2017

This article describes the development of a comprehensive database of state firearm laws covering the period 1991 to the present. It reports major trends in state firearm laws during the study period.

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The Hidden Epidemic of Firearm Injury: Increasing Firearm Injury Rates During 2001-2013

American Journal of Epidemiology, April 2017

This article reports trends in fatal and non-fatal firearm-related injuries from 2001 to 2013 and documents a sharp rise in non-fatal injuries during this period.

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Firearm Ownership and Suicide Rates Among US Men and Women, 1981-2013

American Journal of Public Health, July 2016

This article examines the relationship between levels of household firearm ownership and suicide rates among men and women at the state level between 1981 and 2013. It finds a significant relationship between firearm ownership levels in a state and firearm-related suicide for both men and women. However, the relationship between firearm ownership and total suicide rates was found only for male suicide rates, not female suicide rates.

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Firearm Ownership and the Murder of Women in the United States: Evidence That the State-Level Firearm Ownership Rate Is Associated with the Nonstranger Femicide Rate

Violence and Gender, March 2016

This article examines the relationship between levels of household gun ownership and rates of homicide among women at the state level during the period 1981-2013. It finds a significant, positive relationship between household gun ownership levels in a state and higher homicide rates. This relationship is specific to firearm-related homicide and to non-stranger homicide and is not observed with non-firearm-related homicide or stranger homicide.

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Examining the Relationship between the Prevalence of Guns and Homicide Rates in the USA Using a New and Improved State-Level Gun Ownership Proxy

Injury Prevention, December 2014

This article uses a newly developed proxy for state-level, household firearm ownership to re-examine the relationship between gun ownership levels and homicide rates at the state level between 1981 and 2010. It finds that gun ownership levels, as measured by this new proxy, are associated with significantly higher rates of total and firearm-related homicide but are not significantly associated with non-firearm homicide rates.

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The Relationship between Gun Ownership and Stranger and Nonstranger Firearm Homicide Rates in the United States, 1981-2010

American Journal of Public Health, October 2014

This article examines the relationship between levels of household firearm ownership and stranger and nonstranger firearm homicide rates at the state level between 1981 and 2010. It finds a significant positive relationship between firearm ownership levels and non-stranger homicides, but no significant relationship between firearm ownership levels and stranger homicide.

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A New Proxy Measure for State-Level Gun Ownership in Studies of Firearm Injury Prevention

Injury Prevention, June 2014

This article presents and validates a new proxy variable that can be used to estimate state-level, household firearm ownership prevalence. This new proxy improves the correlation with survey-measured household firearm ownership from 0.80 to 0.95 and more closely approximates the absolute levels of gun ownership.

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