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These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigator(s) if further information is needed.

The study constructed a comprehensive, longitudinal dataset of all counties nested within U.S. States from 1970 to 2012. The study's main purpose was to facilitate research that would further understanding on firearm legislation and its impacts on violence. This comprehensive data collection effort included information on firearm legislation implemented across U.S. States over time in combination with multiple measures of firearm-related violence and injury. Moreover, to better understand the conditions under which firearm legislation is more or less effective, incorporation of county characteristics allowed for examination of whether the effectiveness of state-level firearm legislation depends upon particular characteristics of counties. The researchers conducted a secondary analysis utilizing a variety of archived external government and census sources.

The Study's Dataset Include two Stata Files:

• CJRC_firearms_research.dta (95 Variables, 129,027 Cases)
• state_law_data.dta (19 Variables, 2,168 Cases)

This project investigated the experiences of New York City youth ages 16-24 who were at high risk for gun violence (e.g., carried a gun, been shot or shot at). Youth participants were recruited from three neighborhoods with historically high rates of gun violence when compared to the city as a whole--Brownsville (Brooklyn), Morrisania (Bronx), and East Harlem (Manhattan). This study explores the complex confluence of individual, situational, and environmental factors that influence youth gun acquisition and use. This study is part of a broader effort to build an evidence-based foundation for individual and community interventions, and policies that will more effectively support these young people and prevent youth gun violence. Through interviews with 330 youth, this study seeks to answer these questions:

1. What are the reasons young people carry guns?
2. How do young people talk about having and using guns?
3. What are young people's social networks like, and what roles do guns play in thesenetworks?

Interviews covered the following topics: neighborhood perceptions; perceptions of and experiences with the police, gangs, guns, and violence; substance use; criminal history; and demographics: race, gender, age, legal status, relationship status, living situation, location, number of children, drug use, and education.

The National Lawful Use of Guns Survey is a baseline internet-based survey of 2,086 gun owners who were surveyed in 2019 and again one year later. The survey measured a wide range of variables, including: (a) psychographics; (b) firearm-related knowledge, beliefs, attitudes, practices, and norms; (c) a wide range of personal values; (d) level of engagement with guns (emotional and moral attachment to guns); (e) association between firearms and personal values; (f) mindset towards firearm and other public health policies; (g) level of inclusion in or alienation from the gun control movement; and (h) level of civic engagement with gun violence prevention.

The National Lawful Use of Guns Follow-Up Survey was conducted in 2020 and sampled the same 2,086 gun owners who responded to the baseline survey. This survey tested several communication messages intended to try to increase the willingness of gun owners to participate in gun violence prevention activities.

Recent mass public shootings in venues as diverse as a school, a church, and a concert, have alarmed policymakers and the public alike. Despite mounting interest among journalists and academics, questions regarding the nature and prevention of mass shootings remain. For example, to what extent do mass shooters have histories of mental illness, substance abuse, or violence? Does strengthening or weakening gun control laws have an impact on the incidence or severity of mass public shootings? Are mass shooters influenced by media coverage of these events?

This study is comprised of seven datasets that contain information on mass shooting incidents between 1976 and 2020. Mass public shootings were defined as any event in which four or more individuals, not including the assailant(s), were killed by gunfire in a public setting within a 24-hour period, absent any associated criminal activity (such as a robbery, gang conflict, or illicit drug trade). Three of the datasets have information on characteristics of mass shooting incidents, offenders, victims; two have information on media coverage surrounding these events; and two have information on averted or thwarted mass shooting incidents.

The State Firearm Database catalogs the presence or absence of 134 firearm safety laws in 14 categories covering the 26-year period from 1991 to 2019. The classification system categorizes state firearm provisions using a methodology that both captures differences and maintains a level of comparability between states. Because of this, the database is not the most detailed nor the most comprehensive record of all state firearm policies. Other resources may provide users with a deeper understanding of individual provisions, while this database serves as an efficient way to compare the broad scope of state firearm laws across the country. These provisions covered 14 aspects of state policies, including regulation of the process by which firearm transfers take place, ammunition, firearm possession, firearm storage, firearm trafficking, and liability of firearm manufacturers. In addition, descriptions of the criteria used to code each provision have been provided so that there is transparency in how various law exemptions, exceptions, and other nuances were addressed.