Trigger warning: The effect of ATF citations on U.S.–Mexico firearms trafficking

Authors

  • Topher McDougal University of San Diego
  • Sean Campbell Howard University

DOI:

https://doi.org/10.15355/epsj.21.1.32

Keywords:

Firearms trafficking, Regulatory enforcement, Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF), Federal Firearms Licensees (FFLs), Illicit markets, U.S.–Mexico security, Crime gun diversion, Compliance inspections, Peace economics, Violence prevention

Abstract

Most firearms recovered from crime scenes in Mexico originate in legal U.S. retail markets, yet little is known about whether federal enforcement constrains this diversion. This article examines how compliance citations issued by the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) affect subsequent firearms trafficking from U.S. Federal Firearms Licensees (FFLs) to Mexico. ATF inspection-violation records are merged with more than 12,000 firearms traced from Mexican seizures and U.S. trafficking court cases, exploiting within-dealer variation over time. Across multiple model specifications, ATF citations are strongly associated with reductions in trafficking—each additional citation corresponds to a 20–44% decline in trafficked firearms, and cited dealers contribute substantially fewer trafficked guns than comparable uncited retailers. These results suggest that even limited regulatory enforcement can meaningfully disrupt illicit firearms supply chains upstream of cross-border smuggling.

Author Biography

Sean Campbell, Howard University

Sean K. Campbell is an award-winning investigative journalist and educator based in New York City. His reporting, often rooted in data and focused on social justice, criminal legal systems, race, and public health, has appeared in outlets including New York Magazine, Rolling Stone, ProPublica, Insider, and Slate. His work has exposed systemic discrimination, influenced policy discussions, and shaped national news cycles—earning honors such as the Les Payne Award for Coverage on Communities of Color and the Sidney Award, and recognition from the National Association of Black Journalists. Campbell holds a master’s degree in journalism from Columbia University and serves as a visiting professor at Howard University’s Center for Journalism & Democracy, where he teaches data-driven and investigative reporting. He has also taught at Columbia’s Graduate School of Journalism.

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Published

2026-04-22

How to Cite

McDougal, T., & Campbell, S. (2026). Trigger warning: The effect of ATF citations on U.S.–Mexico firearms trafficking. The Economics of Peace and Security Journal, 21(1), 32–46. https://doi.org/10.15355/epsj.21.1.32

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