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Maxmin-Fair Ranking: Individual Fairness under Group-Fairness Constraints

Published:14 August 2021Publication History

ABSTRACT

We study a novel problem of fairness in ranking aimed at minimizing the amount of individual unfairness introduced when enforcing group-fairness constraints. Our proposal is rooted in the distributional maxmin fairness theory, which uses randomization to maximize the expected satisfaction of the worst-off individuals. We devise an exact polynomial-time algorithm to find maxmin-fair distributions of general search problems (including, but not limited to, ranking), and show that our algorithm can produce rankings which, while satisfying the given group-fairness constraints, ensure that the maximum possible value is to individuals.

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    • Published in

      cover image ACM Conferences
      KDD '21: Proceedings of the 27th ACM SIGKDD Conference on Knowledge Discovery & Data Mining
      August 2021
      4259 pages
      ISBN:9781450383325
      DOI:10.1145/3447548

      Copyright © 2021 ACM

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      • Published: 14 August 2021

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