Cited by 144Ethics and Social Impacts of AICriminal Justice and Corrections AnalysisPrivacy-Preserving Technologies in Data

An algorithm for removing sensitive information: Application to race-independent recidivism prediction

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Johndrow, James E., Lum, Kristian·2019·The Annals of Applied Statistics

Abstract

Predictive modeling is increasingly being employed to assist human decision-makers. One purported advantage of replacing or augmenting human judgment with computer models in high stakes settings—such as sentencing, hiring, policing, college admissions, and parole decisions—is the perceived “neutrality” of computers. It is argued that because computer models do not hold personal prejudice, the predictions they produce will be equally free from prejudice. There is growing recognition that employing algorithms does not remove the potential for bias, and can even amplify it if the training data were generated by a process that is itself biased. In this paper, we provide a probabilistic notion of algorithmic bias. We propose a method to eliminate bias from predictive models by removing all information regarding protected variables from the data to which the models will ultimately be trained. Unlike previous work in this area, our procedure accommodates data on any measurement scale. Motivated by models currently in use in the criminal justice system that inform decisions on pre-trial release and parole, we apply our proposed method to a dataset on the criminal histories of individuals at the time of sentencing to produce “race-neutral” predictions of re-arrest. In the process, we demonstrate that a common approach to creating “race-neutral” models—omitting race as a covariate—still results in racially disparate predictions. We then demonstrate that the application of our proposed method to these data removes racial disparities from predictions with minimal impact on predictive accuracy.

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    “Applications in perturbationbased data repair [98,125,136,152,154,172] have shown that accuracy is not signiicantly afected.”

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Authors
Johndrow, J. E., & Lum, K.
Affiliations
Stanford University (US)
Venue
The Annals of Applied Statistics
Published
2019-03-01
Volume
13
Issue
1
Pages
189-220
ISSN
  • 1932-6157 (ISSN-L)
  • 1941-7330
OpenAlex
W2600853029
Cited by
141
References
40
Citations by year
2026: 4 · 2025: 7 · 2024: 12 · 2023: 14 · 2022: 16 · 2021: 32 · 2020: 28 · 2019: 19 · 2018: 8 · 2017: 1
FWCI
41.52
Type
journal article
Language
en
Open access
Locations
  • The Annals of Applied Statistics (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • Project Euclid (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Social Sciences › Safety Research › Ethics and Social Impacts of AI
  • Social Sciences › Sociology and Political Science › Criminal Justice and Corrections Analysis
  • Physical Sciences › Computer Science › Artificial Intelligence › Privacy-Preserving Technologies in Data
Keywords
algorithmic bias, sensitive information removal, recidivism prediction, protected characteristics, parole decisions, sentencing, racial disparities, criminal justice

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