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Paradoxes in Fair Machine Learning
Paul Gölz · Anson Kahng · Ariel Procaccia

Thu Dec 12 10:35 AM -- 10:40 AM (PST) @ West Ballroom C
in Track 4 Session 5 »

Equalized odds is a statistical notion of fairness in machine learning that ensures that classification algorithms do not discriminate against protected groups. We extend equalized odds to the setting of cardinality-constrained fair classification, where we have a bounded amount of a resource to distribute. This setting coincides with classic fair division problems, which allows us to apply concepts from that literature in parallel to equalized odds. In particular, we consider the axioms of resource monotonicity, consistency, and population monotonicity, all three of which relate different allocation instances to prevent paradoxes. Using a geometric characterization of equalized odds, we examine the compatibility of equalized odds with these axioms. We empirically evaluate the cost of allocation rules that satisfy both equalized odds and axioms of fair division on a dataset of FICO credit scores.

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Author Information

Paul Gölz (Carnegie Mellon University)
Anson Kahng (Carnegie Mellon University)
Ariel Procaccia (Carnegie Mellon University)

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