Curriculum Vitae

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Profile

I research and advise on crime and public safety policy while completing a PhD in criminology at Cambridge, where my dissertation evaluates a program to improve conditions on blocks with persistently high levels of serious crime. My particular expertise is in New York City’s administrative records on crime, disorder, enforcement, and police operations, and in how departmental practices shape what those records contain. Former NYPD Deputy Inspector and MTA Police Inspector.

Education

  • University of Cambridge — PhD, Criminology (2026– ), Institute of Criminology. Supervisor: Charles Lanfear.
  • New York University — MS, Urban Informatics, Center for Urban Science and Progress
  • Harvard Kennedy School — Master in Public Administration
  • Cornell University — BA, Biology

Appointments

  • Vital City — Advisor, crime strategy and urban policy, 2024–
  • MTA Police Department — Inspector; Commanding Officer, Office of Internal Governance, 2023–2024
  • New York City Police Department, 2005–2023 — Deputy Inspector. Executive Officer, Office of Crime Control Strategies (2020–23); Commanding Officer, 111th Precinct (2018–20); Commanding Officer, Operations Research Section (2014–16)

Publications

Peer-reviewed publications

  • Hall, J. J., & Ratcliffe, J. H. (2025). Assessing the impact of safe consumption sites on neighborhood crime in New York City: a synthetic control approach. Journal of Experimental Criminology. DOI
  • Del Pozo, B., Moskos, P., Donohue, J. K., & Hall, J. J. (2024). Reconsidering the effects of strip clubs on sex crimes in New York City. Police Practice and Research, 25(3), 376–385.
  • Chatterjee, O., Taylor, L. A., Ahmed, S., Nagaraj, S., Hall, J. J., Finckbeiner, S. M., & McCobb, D. P. (2009). Social stress alters expression of large conductance calcium-activated potassium channel subunits in mouse adrenal medulla and pituitary glands. Journal of Neuroendocrinology, 21(3), 167–176.

Preprints and papers under review

  • Hall, J., & Nix, J. (2026). Fast and Spurious: A causal evaluation of NYPD’s pursuit policy, 2022–2025. CrimRxiv. Link

Selected reports and essays

  • Hall, J. J. (2026). Did NYPD’s Zone Strategy cause crime to drop? Vital City.
  • Hall, J. J. (2026). Reality Check: Why do New York City’s crime numbers change? Vital City.
  • Hall, J. J. (2025). Reality Check: Does the NYPD need to hire more cops? Vital City.
  • Hall, J. J., & Dupont, B. (2025). NYC youth crime in context: Arrest and recidivism.
  • Chalfin, A., Hall, J. J., & Reeping, P. (2025). Subway safety: What the data show. Vital City, December 16.
  • Hall, J. J. (2025). New York’s gang database keeps the city safe, and lawmakers want to kill it. City Journal.
  • Hall, J. J. (2024). Deciphering retail theft data: Implications and actions for policymakers. Manhattan Institute.
  • Hall, J. J. (2024). The false promise of police crackdowns in NYC. Vital City.
  • Hall, J. J. (2024). Are the kids all right? The truth about youth crime in NYC. Vital City.
  • Reeping, P., Hall, J. J., & Chalfin, A. (2025). Just the facts on New York City subway crime. Vital City.
  • Hall, J. J. (2025). The Bronx’s crime crisis. Vital City.
  • Hall, J. J., & Moskos, P. (2023). Fix public policy or pay a price. Vital City.
  • Hall, J. J. (2021). Why police need to enforce traffic laws. Manhattan Institute.

Honors

  • National Institute of Justice LEADS Scholar, 2017–2020

Selected press

  • The New York Times, March 2025 (subway crime, two articles)
  • Gothamist, July 2026 (revisions to NYPD crime statistics)