Research, journalism, and commentary related to the Stanford Open Policing Project
Working paper, 2019.
We analyze a unique dataset of nearly 100 million traffic stops carried out by state and local law enforcement agencies.
We filed public records requests to gain access to police data, and found evidence of racially biased policing.
The Marshall Project
An attempt to find out if traffic stops are prone to racial bias confronts a frayed patchwork of data across the country.
Annals of Applied Statistics, Vol. 11, 2017.
We introduce a new statistical test of discrimination — the threshold test — that mitigates problems with traditional measures of bias.
The 21st International Conference on Artificial Intelligence and Statistics, 2018.
We develop a method for fitting threshold tests that is two orders of magnitude faster than past approaches, reducing computation from hours to minutes.
Annals of Applied Statistics, Vol. 10, 2016.
With statistically informed rules, police departments can reduce police stops and mitigate racial disparities without sacrificing public safety.
New Criminal Law Review, Vol. 20, 2017.
The exponential growth of information about police activity offers new opportunities to improve the fairness and effectiveness of law enforcement.
White paper, 2018
Examining the Metropolitan Nashville Police Department’s (MNPD) traffic stop practices in 2017, drawing on an extensive dataset of records provided by the department.
Working paper, 2017.
By following simple guidelines for setting bail, judges can detain half as many defendants without appreciably increasing the number who miss their court dates.
Proceedings of the International Conference on Knowledge Discovery & Data Mining, 2017.
When a judge makes a bail decision, there is tension between reducing racial disparities and treating all defendants equally. Video link
The Washington Post
What does it mean for an algorithm to be fair?
Harvard Business Review
Recognizing the real-world constraints managers and engineers face, the authors developed a simple, three-step procedure for creating rubrics that improve yes-or-no decisions.
The American Economic Review: Papers and Proceedings, Vol. 106, 2016.
In the criminal justice system, risk assessment tools can be used both to assist upcoming decisions and audit past actions.