First this study covered in The New York Times 2 days ago:
Weaker gun laws = more shootings and deaths.
From that article:
Many states with the weakest gun laws have the worst rates of gun violence, ranking high on numerous indicators, like gun homicides and suicides, firearm deaths of children, and killings of law enforcement officers, according to a report to be issued Wednesday by the liberal Center for American Progress.
Alaska ranked first in overall gun deaths, the report found, with 20.28 deaths per 100,000 people in 2010 — more than twice the national average — followed by Louisiana and Montana, all states that prior analyses have judged to have weak gun laws. Eight of the states with the highest levels of gun violence were among the 25 with the weakest gun laws, the report found.
The report is the second in recent weeks to link gun deaths and firearms laws.
Right. Here's the other one:
Importance Over 30 000 people die annually in the United States from injuries caused by firearms. Although most firearm laws are enacted by states, whether the laws are associated with rates of firearm deaths is uncertain.
Objective To evaluate whether more firearm laws in a state are associated with fewer firearm fatalities.
Design Using an ecological and cross-sectional method, we retrospectively analyzed all firearm-related deaths reported to the Centers for Disease Control and Prevention Web-based Injury Statistics Query and Reporting System from 2007 through 2010. We used state-level firearm legislation across 5 categories of laws to create a “legislative strength score,” and measured the association of the score with state mortality rates using a clustered Poisson regression. States were divided into quartiles based on their score.
Setting Fifty US states.
Participants Populations of all US states.
Here's the meat of the study:
Main Outcome Measures The outcome measures were state-level firearm-related fatalities per 100 000 individuals per year overall, for suicide, and for homicide. In various models, we controlled for age, sex, race/ethnicity, poverty, unemployment, college education, population density, nonfirearm violence–related deaths, and household firearm ownership.
Results Over the 4-year study period, there were 121 084 firearm fatalities. The average state-based firearm fatality rates varied from a high of 17.9 (Louisiana) to a low of 2.9 (Hawaii) per 100 000 individuals per year. Annual firearm legislative strength scores ranged from 0 (Utah) to 24 (Massachusetts) of 28 possible points. States in the highest quartile of legislative strength (scores of ≥9) had a lower overall firearm fatality rate than those in the lowest quartile (scores of ≤2) (absolute rate difference, 6.64 deaths/100 000/y; age-adjusted incident rate ratio [IRR], 0.58; 95% CI, 0.37-0.92). Compared with the quartile of states with the fewest laws, the quartile with the most laws had a lower firearm suicide rate (absolute rate difference, 6.25 deaths/100 000/y; IRR, 0.63; 95% CI, 0.48-0.83) and a lower firearm homicide rate (absolute rate difference, 0.40 deaths/100 000/y; IRR, 0.60; 95% CI, 0.38-0.95).
Conclusions and Relevance A higher number of firearm laws in a state are associated with a lower rate of firearm fatalities in the state, overall and for suicides and homicides individually. As our study could not determine cause-and-effect relationships, further studies are necessary to define the nature of this association.
As if the Harvard studies on guns weren't enough.
Link: Harvard School of Public Health » Harvard Injury Control Research