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Center for Gun Policy and Research

Reducing Gun Violence in America
To order a copy of “Reducing Gun Violence in America” from JHU Press, please click here. To read the 2014 Update, please click here. More
Gun Policy Summit January 14-15, 2013
Johns Hopkins University convened more than 20 global experts on gun policy and violence to summarize relevant research and its implications for policymakers and concerned citizens. Click here for archived video of the event
The Case for Gun Policy Reforms
A synthesis of prior research and analysis conducted by researchers at the Johns Hopkins Center for Gun Policy and Research examines policy reforms and initiatives for reducing gun violence in the U.S. Download the Report
Legal Issues
The Center monitors and evaluates the effectiveness of major gun laws, including those related to: "Saturday night special" handguns; handgun registration and licensing; child access prevention; and minimum purchase and possession age. More
Gun Trafficking
The Center is committed to studying and reducing illegal firearm trafficking. The Center's work in this area focuses on the role of gun dealers, straw purchases, and firearm theft in the transfer of guns from legal to illegal markets. More
Keeping Guns from Youth
The Center studies policies and behaviors related to gun access and carrying among youth. Center research focuses on trends and prevention of youth homicide, suicide, violence, and unintentional injury by firearms. More
Domestic Violence
The Center studies policies and behaviors related to gun violence perpetrated by domestic violence offenders. Center research seeks to identify whether current legal practices effectively keep guns out of the hands of batterers. More

Faculty and Staff


Prof. Daniel Webster

Professor Daniel Webster, ScD, MPH
Center Director
Daniel W. Webster, ScD, MPH, is a Professor of Health Policy and Management at the Johns Hopkins Bloomberg School of Public Health, where he serves as Director of the Center for Gun Policy and Research, Deputy Director of Research for the Center for the Prevention of Youth Violence, and Director of the PhD program in Health and Public Policy. He has published numerous articles on the prevention of gun violence, firearm policy, youth gun acquisition and carrying, intimate partner violence, and the prevention of youth violence. Dr. Webster is currently leading studies evaluating the effects of various efforts to reduce violence, including state gun and alcohol policies, policing strategies focused on deterring gun violence, a community gun violence prevention initiative, and Maryland’s Lethality Assessment Program for reducing the recurrence of intimate partner violence. Dr. Webster teaches courses in violence prevention and research methods for health policy at Johns Hopkins, and serves on the executive committee of Johns Hopkins’ Interdepartmental Violence Research Pre- and Post-Doctoral Training Program.

Jon Vernick

Associate Professor Jon Vernick, JD, MPH
Center Co-Director
Jon S. Vernick, JD, MPH, is an Associate Professor of Health Policy and Management at The Johns Hopkins Bloomberg School of Public Health and Co-Director of the Johns Hopkins Center for Gun Policy and Research. Jon Vernick is the primary instructor for courses on Issues in Injury and Violence Prevention, and Public Health and the Law. He is also Co-Director of the MPH/JD Program at Johns Hopkins. Jon Vernick’s research has concentrated on ways in which the law and legal interventions can improve the public's health. He is particularly interested in epidemiologic, policy, legal, and ethical issues associated with the prevention of firearm and other injuries. He has also studied legal aspects of motor vehicle safety, tobacco control, public health preparedness, and obesity prevention, having published more than 75 scholarly articles and reports on these and other topics. Prof. Vernick is committed to translating research findings into policy change, regularly working with legislators, media, courts, and advocates to provide information about effective policies. Jon Vernick earned his BA from the Johns Hopkins University, a JD with honors from the George Washington University, and an MPH from the Johns Hopkins Bloomberg School of Public Health.

Stephen Teret

Professor Stephen Teret, JD, MPH
Center Faculty
Stephen P. Teret. JD, MPH, Associate Dean for Education and Faculty Development at the Johns Hopkins Bloomberg School of Public Health, is Professor of Health Policy and Management and Director of the Johns Hopkins Center for Law and the Public’s Health. Professor Teret holds joint faculty appointments in Pediatrics and in Emergency Medicine at the Johns Hopkins School of Medicine. Professor Teret was the founding director of the Johns Hopkins Center for Gun Policy and Research, having served as director from 1995 until 2001. He has worked on guns as a public health issue since 1979, focusing on the epidemiology of gun-related morbidity and mortality, legal and policy approaches to reducing gun violence, gun litigation, and changing the design of guns. He has served as a consultant on gun policy to the President of the United States, the Attorney General, the United States Congress, state governors and state legislatures. He is the recipient of distinguished career awards from the American Public Health Association, and the Association of Trial Lawyers of America.

Shannon Frattaroli

Associate Professor Shannon Frattaroli, PhD, MPH
Center Faculty
Shannon Frattaroli, PhD., MPH, is an Associate Professor in the Department of Health Policy and Management at the Johns Hopkins Bloomberg School of Public Health. Her research interests include understanding how policies are implemented and enforced, with particular attention to policies designed to reduce intimate partner violence, and illegal gun transfers. She uses both qualitative and quantitative approaches toward those ends.

 Shelly GreenbergProfessor Sheldon Greenberg, PhD
Center Faculty
Sheldon Greenberg, Ph.D., is Professor of Management and Leadership in the Johns Hopkins University, School of Education, and is the founding director of the School’s Division of Public Safety Leadership.  He served as Associate Dean in the School of Education for over 12 years.  He developed and directed graduate (Master of Science in Management and Master of Science in Intelligence Analysis) and undergraduate (Bachelor of Science in Management) degree programs for public safety, which includes the Police Executive Leadership Program, U.S. Secret Service Executive Development Program, and U.S. Immigration and Customs Enforcement Executive Development Program.  He served almost two years as Associate Dean and Director of the JHU Division of Business and Management (currently the Carey School of Business), where he was co-leader in designing and implementing  the Johns Hopkins University MBA degree program.  Dr. Greenberg served as Associate Director of the Police Executive Research Forum (PERF), a renowned law enforcement center for research.  He began his career in the Howard County (MD) Police Department, serving as a patrol officer, supervisor, and commander of the administrative services bureau.  His research interests are police patrol, police response to people who have disabilities, the role of police in public health, and the relationship of public safety to community development.  He served on several national commissions and is a member of the Federal Law Enforcement Training Accreditation Board.  He is the author of three books and numerous articles. His fourth book, Mastery of Police Patrol, will be published by Pearson Prentice-Hall. He is working on his fifth book on managing community fear.

Dr. Colleen BarryAssociate Professor Colleen L. Barry, PhD, MPP
Center Faculty
Colleen L. Barry, Ph.D., M.P.P. is an Associate Professor and Associate Chair for Research and Practice in the Department of Health Policy and Management at the Johns Hopkins Bloomberg School of Public Health. Professor Barry’s research focuses on policy and regulation affecting often-stigmatized health conditions with a focus on mental illness, substance use disorders, and obesity. Much of her current research involves examining the implications of various aspects of the Affordable Care Act (ACA) on persons with mental illness or substance use disorders. She has also been involved in a number of studies examining public attitudes about gun policy and mental illness. She teaches courses in health policy and in public opinion research.  Professor Barry received her Ph.D. in health policy from Harvard University and her masters degree in public policy from the John F. Kennedy School of Government at Harvard.

Dr. Beth McGintyAssistant Professor Beth McGinty, PhD
Center Faculty
Dr. McGinty is an Assistant Professor in the Department of Health Policy and Management at JHSPH, and a core faculty member of both the Center for gun Policy and Research and the JHSPH Institute for Health and Social Policy.  Her research focuses on how public policies affect mental health, substance use, and gun violence. Dr. McGinty's recent research examined the effects of news media coverage of mass shootings by persons with mental illness on Americans' support for gun policies and attitudes toward individuals with serious mental illnesses. At the Center for Gun Policy and Research, Dr. McGinty uses  public opinion surveys and message framing experiments to assess public support for gun violence prevention policies and collaborates on studies of the effects of youth-focused firearm restrictions and policies designed to prevent the diversion of guns to criminals.  She received her PhD in Health Policy and Management in 2013 from the JHSPH where she was a Sommer Scholar and received an MS in Health and Behavior Studies from Columbia University in 2006.

CrifasiCassandra Crifasi, PhD, MPH
Assistant Scientist
Dr. Crifasi is an Assistant Scientist in the Department of Health Policy and Management at the Johns Hopkins Bloomberg School of Public Health and a core faculty member in the Center for Gun Policy and Research and the Center for Injury Research and Policy. Her research focuses on injury epidemiology, occupational injury prevention, and the impact of policies, practices, and procedures on public safety and first responders. Dr. Crifasi’s recent research examined the affect changing state policies have on the assault and homicide of law enforcement officers in the United States. She received her PhD in Health Policy and Management in 2014 from the Johns Hopkins Bloomberg School of Public Health and an MPH in Environmental and Occupational Health from the Drexel University School of Public Health in 2010.

Shani BuggsShani Buggs, MPH
Graduate Research Assistant
Shani is a doctoral student in the Department of Health Policy and Management at JHSPH.  Her research interests include gun violence, access to firearms, and comprehensive approaches to reducing violent crime through policies and programs at the city, state, and federal levels.  Her master’s thesis involved a research proposal to examine private handgun sellers’ willingness to sell Internet-advertised guns to potentially illegal purchasers.  Shani is collaborating on studies at the Center for Gun Policy and Research related to state-level implementation of firearm safety policies and underground gun markets.  She is also currently working in the Baltimore Mayor’s Office of Emergency Management and Public Safety on efforts to enhance Baltimore’s violent crime reduction strategies.  Shani received her MPH from JHSPH in 2013 and her BA in Psychology from Stanford University in 2002.

Alicia SamuelsAlicia Samuels, MPH
Director of Communications
Alicia Samuels is a public health communications professional with nearly fifteen years of experience communicating public health information to media, policymakers, healthcare professionals and the public. Alicia leads the strategic communications and media relations programs for the Gun Center. Examples of stories she has placed can be found here.  Ms Samuels is the author of numerous scientific articles and consumer education pieces, and her work has been showcased at the annual National Conference on Health Communication, Marketing, and Media sponsored by the Centers for Disease Control and Prevention. Alicia received her MPH from Emory University in 2001 and her B.A. cum laude from the University of Rochester in 1999. She also directs communications for the Center on Alcohol Marketing and Youth.

Sharon Wakefield
Senior Administrative Coordinator
Sharon Wakefield is a Senior Administrative Coordinator with the Johns Hopkins Center for Gun Policy and Research. She has been affiliated with the Center since its inception, and provides administrative support for a number of the Center's initiatives. She also serves as a resource for graduate students who work with the Center's faculty.

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