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- W4308242900 abstract "To mitigate the bias exhibited by machine learning models, fairness criteria can be integrated into the training process to ensure fair treatment across all demographics, but it often comes at the expense of model performance. Understanding such tradeoffs, therefore, underlies the design of fair algorithms. To this end, this paper provides a complete characterization of the inherent tradeoff of demographic parity on classification problems, under the most general multi-group, multi-class, and noisy setting. Specifically, we show that the minimum error rate achievable by randomized and attribute-aware fair classifiers is given by the optimal value of a Wasserstein-barycenter problem. On the practical side, our findings lead to a simple post-processing algorithm that derives fair classifiers from score functions, which yields the optimal fair classifier when the score is Bayes optimal. We provide suboptimality analysis and sample complexity for our algorithm, and demonstrate its effectiveness on benchmark datasets." @default.
- W4308242900 created "2022-11-09" @default.
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- W4308242900 date "2022-11-02" @default.
- W4308242900 modified "2023-09-27" @default.
- W4308242900 title "Fair and Optimal Classification via Post-Processing" @default.
- W4308242900 doi "https://doi.org/10.48550/arxiv.2211.01528" @default.
- W4308242900 hasPublicationYear "2022" @default.
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