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In the United States, firearms are involved in tens of thousands of deaths and injuries each year. The magnitude of this problem prompted the National Academy of Sciences (NAS) to issue a report in 2004 detailing the strengths and limitations of existing research on the relationship between firearms and violence. In response, a multidisciplinary group of experts in the field of firearms and violence formed the National Research Collaborative on Firearm Violence. The Collaborative met for 2 days in June 2005 to (1) critically review the main findings of the NAS report and (2) define a research agenda that could fill research and data gaps and inform policy that reduces gun-related crime, deaths and injuries. This article summarizes the Collaborative's conclusions and identifies priorities for research and funding.
Recent reports have highlighted the global impact of non-conflict-related firearm violence.1,2 One study estimated that the global burden of firearm mortality is between 196000 and 229000 annually.2 The US has the highest rate of firearm violence among industrialized democracies, with firearms accounting for the majority of homicides and suicides. In 2003, nearly 30000 people in the US died from gunshot wounds, including 16859 by suicide and 11599 by homicide.3 More than 65 000 people sustained non-fatal gunshot injuries.4 The Federal Bureau of Investigation (FBI) estimates that in 2003, firearms were used in 67% of murders, 42% of robberies and 19% of assaults reported to police.5 These statistics describe the significant impact of firearm-related violence, but do not specify the effects of firearms on violence. How many deaths, injuries and crimes would have occurred if a gun were not present at the site of the crime? How often is a gun used to deter crime or avert injury? What interventions can reduce firearm-related violence?
To inform policy makers about the existing evidence, a distinguished committee of the National Academy of Sciences (NAS) issued a landmark report in December 2004, Firearms and violence: a critical review.6 The report assessed the strengths and limitations of the existing research on gun violence, and recommended ways to improve the empirical basis for policy discussions.7
The report indicates that considerable gaps in research and data make it difficult to draw cause-and-effect relationships between firearms and violence. Further, methodological problems hamper efforts to evaluate policies and to gain consensus on effective strategies to lower gun crime and violence.
As researchers, we may agree or disagree with aspects of the report's conclusions, and still accept the challenge to build the empirical foundation of the violence-prevention field. With funding from the Joyce Foundation, we formed the National Research Collaborative on Firearm Violence, which met for 2 days in June 2005. Coordinated by the Firearm & Injury Center (FICAP) at the University of Pennsylvania, the Collaborative includes 27 researchers who attended a 2-day meeting in Philadelphia, Pennsylvania, USA and invitations to 23 others who could not attend. The Collaborative comprises scientists and practitioners from many disciplines—including criminologists, economists, epidemiologists, lawyers, nurses, physicians and political scientists—most with an enduring track record in the violence-prevention field. Our goal is to identify ways to fill the gaps between data and research to inform policy that reduces gun-related crime, deaths and injuries.
Members of the Collaborative reviewed the NAS report in detail, and formed six workgroups structured around the report's major findings. Table 11 summarizes the major NAS recommendations (the full report can be viewed at http://nap.edu/books/0309091241/html). Each workgroup discussed one or more chapters of the report, including firearms and suicide, deterrence and defense, restricting access, firearm injury prevention programs, and criminal justice interventions. Additionally, the entire collaborative addressed the need for better data and better access to data on firearm violence. Each discussion focused on three points: (1) important questions within each topic; (2) accuracy and comprehensiveness of the NAS recommendations, and other evidence to be considered; and (3) next steps to move the science forward.
The workgroup leaders summarized each group's discussions before the entire Collaborative, which discussed and refined them. Areas of agreement and disagreement were clarified, although no attempt was made to reach complete consensus. The entire group then focused its recommendations and identified research priorities, as summarized in the following.
The NAS report noted that inadequate data and inadequate access to existing data, are among the most critical barriers to understanding gun violence. The report recommended that the federal government support a systematic program of data collection on firearms and violence, including emerging data systems on violent events such as the National Violent Death Reporting System and the National Incident-Based Reporting System (NIBRS). The report also noted the need for better data on firearm markets, ownership and use.
The workgroup strongly agreed with the NAS report, and identified data sources that remain unutilized or underutilized for research. It noted that more data are not necessarily better data—for example, the NIBRS might be more useful if it were redesigned to collect key data on a sample of violent incidents, rather than attempting large-scale data collection on all incidents.
The workgroup acknowledged that some gun owners and dealers have concerns about confidentiality and the use of data in the public domain. Recently, these concerns prompted broad statutory and funding restrictions to data that had previously been used in research, such as gun-tracing data (which track the sales history of guns recovered by police). Tracing data enable law enforcement to determine the first retail seller and purchaser of guns used in crimes. The data are vital to understand how criminals obtain guns and are critical in evaluating policies designed to reduce the access of guns to criminals.
With safeguards, the Collaborative believes that qualified researchers should have access to data that have clear research purposes (such as date of death, often withheld in mortality data sources). The Collaborative makes the following recommendations:
The NAS report reviewed a wealth of observational studies linking suicide and firearms at aggregate levels, and found a clear association between firearms and gun suicide. It concluded, however, that the evidence did not credibly demonstrate that the association was causal, because of data and methodological limitations.
The NAS report also described many case–control studies of firearms and suicide but again concluded that data and methodological problems seriously limit the application of these studies. The report recommended further individual-level, longitudinal studies of the link between firearms and suicide.
The workgroup acknowledged the challenges of establishing causality, but believed that the accumulated evidence supports a causal relationship between firearm availability and suicide. The magnitude of the statistical associations between firearm availability and suicide, the consistency of findings over multiple studies in different populations, and the reality that a firearm greatly increases the risk that a suicide attempt will be lethal, all point to a causal connection. Nevertheless, significant questions remain about the interplay between impulsivity, suicidal intent and the substitution of means used to attempt suicide.
The Collaborative recommends the following steps to improve understanding of the relationship between firearms and suicide:
The NAS report considered the defensive and deterrent effects of firearms. To what extent do firearms allow individuals to defend themselves against criminals and deter crime? The report concluded that no accurate measurement of defensive gun use upon which to base policy discussions exists. It considered the effects of “right-to-carry” laws that allow qualified adults to carry concealed handguns, and found contradictory results in existing studies. The NAS report recommended that new methods and analytic techniques be used to understand the net social costs or benefits of defensive gun use and concealed weapons.
The workgroup agreed that existing evidence was unlikely to provide answers to these issues, and recommends the following approaches:
The NAS report reviewed interventions to reduce access to firearms by criminals and others not legally qualified to purchase a gun. These interventions include tough regulation of federal firearm licensees, one-gun-a-month laws, gun buy-back programs, and enforcement of laws against illegal buyers or sellers. It concluded that efforts to shut down the pipeline to illegal markets are based on speculation rather than research. Existing evidence does not answer critical questions about whether the illegal pipeline can be shut down, the costs of doing so, and whether criminals substitute one source or type of gun with another.
The workgroup agreed that criminal diversion of firearms after the point of sale is a huge problem, but believed that the report conflated illegal access with illegal use. The group suggested a multilevel research strategy to better understand how certain “high-risk” users (eg, felons, people convicted of misdemeanors, people about to be sentenced) acquire guns, whether or not they are proscribed purchasers. Researchers should:
The NAS report reviewed the evidence on widely disseminated prevention programs, especially those directed at youth, and found that few had been adequately evaluated for their effects on attitudes or behavior. The report also touched on a variety of safety innovations, (eg, locking technology and “smart gun” features) found little evidence on their efficacy or cost-effectiveness, and noted that some technologies may have dangerous unintended consequences. The NAS report recommended that firearm-injury-prevention programs be based on general prevention theory, and that evaluation be incorporated as programs are implemented.
The workgroup agreed with most of the report's assessments about injury-prevention programs, and debated whether the evidence about the utility of certain technologies such as personalized weapons was persuasive. The workgroup recommends the following steps:
The NAS report reviewed the effectiveness of criminal justice interventions such as gun courts, enhanced sentences for criminal firearm use, and problem-oriented policing. The report found that a number of policing strategies and sentencing enhancements had shown some success, but criticized their quasi-experimental study designs. It recommended that a sustained, systematic research program be conducted, using more rigorous methods such as randomized experiments or pooled time-series cross-sectional studies.
The workgroup believed that the evidence for certain interventions, such as problem-oriented policing strategies in Boston and Indianapolis, USA, was limited but compelling. Although many questions about the mechanisms by which the interventions reduce gun violence remain unanswered, the success of individual programs argues for replication in other communities. Further, the group believed that the nature of many community-level interventions precludes randomization, thereby making the NAS recommendations to conduct randomized trials impractical.
The Collaborative suggests a research strategy that can disentangle the effects of different aspects of the most successful and most sustainable criminal justice interventions, and recommends the following approaches:
Over the course of 2 days, the Collaborative discussed how to build upon the NAS report and move the field forward. Several themes emerged that span the individual discussion topics. These themes and each workgroup's recommendations, form a research agenda for reducing firearm violence. The themes include:
CDC - Centers for Disease Control and Prevention
FBI - Federal Bureau of Investigation
NAS - National Academy of Sciences
NIBRS - National Incident-Based Reporting System
iNVRDS is a state-based monitoring system of all violent deaths. Since 2002, the Centers for Disease Control and Prevention (CDC) has funded 17 states to implement National Violent Death Reporting System.
iiNIBRS represents a modernization of the FBI's Uniform Crime Reporting summary system. Participating law enforcement agencies report data to the FBI on criminal incidents involving 46 specific offenses, with detailed information on the incident, victim(s), offender(s) and arrests. About 23 states, fully or partially, participate in NIBRS. Federal grant funds to help localities and states implement NIBRS have been unavailable since 2001.
iiiThe 2005 Consolidated Appropriation Act (PL 108–447) prohibited federal funds from being used “to disclose part or all of the contents of the Firearms Trace System database maintained by the National Trace Center of the Bureau of Alcohol, Tobacco, Firearms, and Explosives” except to law enforcement officials.
ivGuidelines state that the CDC will not fund “activities designed to affect the passage of specific Federal, State, or local legislation intended to restrict or control the purchase or use of firearms.”
vAccording to NIJ online statistics, it funded two grants in 2002, three each in 2003 and in 2004, which were devoted to research on firearms and violence.
Funding: This work was supported by the Joyce Foundation. The funder had no role in the writing of the report or the decision to submit the manuscript.
Competing interests: None.