Lexicographically Fair Learning: Algorithms and Generalization

@inproceedings{Diana2021LexicographicallyFL,
  title={Lexicographically Fair Learning: Algorithms and Generalization},
  author={Emily Diana and Wesley Gill and Ira Globus-Harris and Michael Kearns and Aaron Roth and Saeed Sharifi-Malvajerdi},
  booktitle={FORC},
  year={2021}
}
We extend the notion of minimax fairness in supervised learning problems to its natural conclusion: lexicographic minimax fairness (or lexifairness for short). Informally, given a collection of demographic groups of interest, minimax fairness asks that the error of the group with the highest error be minimized. Lexifairness goes further and asks that amongst all minimax fair solutions, the error of the group with the second highest error should be minimized, and amongst all of those solutions… 
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