Reducing Gun Violence: The Boston Gun Project’s Operation Ceasefire — David M. Kennedy, Anthony A. Braga, Anne M. Piehl, and Elin J. Waring (September 2001)

This landmark study examines Boston’s Operation Ceasefire, a focused-deterrence strategy that targeted violent gangs rather than broad populations. Combining enforcement, community outreach, and direct communication, the program produced one of the most dramatic reductions in youth gun violence ever documented.

1. Youth Gun Violence Was Driven by a Small Number of Chronic Offenders

2. Gang Rivalries, Not Random Crime, Drove Most Killings

3. Illegal Gun Markets Supplied High-Risk Offenders

4. Traditional Enforcement Was Not Solving the Problem

5. Focused Deterrence Could Change Offender Behavior

6. The “Pulling Levers” Strategy Created Credible Consequences

7. Enforcement Worked Best Alongside Community Support

8. Focused Deterrence Produced Dramatic Violence Reduction

🧠 Conclusion

The Boston Gun Project fundamentally changed how many criminologists think about violence.

Instead of viewing gun violence as a citywide problem caused equally by all offenders, the project showed that most serious violence was concentrated among a small number of gangs, chronic offenders, and ongoing rivalries. ⭐

By identifying those networks and directly changing their incentives through focused deterrence, Boston achieved one of the most significant reductions in youth homicide ever documented.