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Differentially Private Fair Learning
Matthew Jagielski · Michael Kearns · Jieming Mao · Alina Oprea · Aaron Roth · Saeed Sharifi-Malvajerdi · Jonathan Ullman

Thu Jun 13 11:40 AM -- 12:00 PM (PDT) @ Seaside Ballroom

Motivated by settings in which predictive models may be required to be non-discriminatory with respect to certain attributes (such as race), but even collecting the sensitive attribute may be forbidden or restricted, we initiate the study of fair learning under the constraint of differential privacy. Our first algorithm is a private implementation of the equalized odds post-processing approach of (Hardt et al., 2016). This algorithm is appealingly simple, but must be able to use protected group membership explicitly at test time, which can be viewed as a form of “disparate treatment”. Our second algorithm is a differentially private version of the oracle-efficient in-processing approach of (Agarwal et al., 2018). This algorithm is more complex but need not have access to protected group membership at test time. We identify new tradeoffs between fairness, accuracy, and privacy that emerge only when requiring all three properties, and show that these tradeoffs can be milder if group membership may be used at test time.

Author Information

Matthew Jagielski (Northeastern University)
Michael Kearns (University of Pennsylvania)
Jieming Mao (University of Pennsylvania)
Alina Oprea (Northeastern University)
Aaron Roth (University of Pennsylvania)
Saeed Sharifi-Malvajerdi (University of Pennsylvania)
Jonathan Ullman (Northeastern University)

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