Aaron Chalfin

is an associate professor of criminology at the University of Pennsylvania.

Subway Safety: What the Data Show

Data

Subway Safety: What the Data Show

Aaron Chalfin, John Hall, Paul Reeping Dec. 16 2025

Just the Facts on New York City Subway Crime

Data

Just the Facts on New York City Subway Crime

Aaron Chalfin, John Hall, Paul Reeping Jan. 31 2025

Crime in Context, Locally and Nationally

What Do We Know?

Crime in Context, Locally and Nationally

Aaron Chalfin Jan. 22 2025

Underground: Safer Than the Surface?

Why the Trains Matter

Underground: Safer Than the Surface?

Aaron Chalfin, Alex Chohlas-Wood, Morgan C. Williams Jr. Oct. 02 2024

Crime on the New York City Subway: How Rare Is it Really?

Subway Crime

Crime on the New York City Subway: How Rare Is it Really?

Aaron Chalfin, Alex Chohlas-Wood, Morgan C. Williams Jr. Jun. 06 2024

Is Transformational Change the Only Thing That Matters?

Public Health

Is Transformational Change the Only Thing That Matters?

Aaron Chalfin Mar. 27 2024

A Safer City and Nation, With Asterisks

Setting the Stage

A Safer City and Nation, With Asterisks

Aaron Chalfin Feb. 28 2024

When City Streets Really Are War Zones

Connecting Dots

When City Streets Really Are War Zones

Aaron Chalfin, Brandon del Pozo Sep. 27 2023

Crime, a Symposium: Looking Back, Looking Forward

Crime

Crime, a Symposium: Looking Back, Looking Forward

Aaron Chalfin, A Survey Mar. 16 2023

Crime and the Built Environment

New Solutions

Crime and the Built Environment

Aaron Chalfin Oct. 25 2022

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