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Near-Optimal Algorithms for Group Distributionally Robust Optimization and Beyond

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arxiv 2212.13669 v2 pith:UATFXXMN submitted 2022-12-28 cs.LG math.OC

Near-Optimal Algorithms for Group Distributionally Robust Optimization and Beyond

classification cs.LG math.OC
keywords algorithmsgroupoptimizationdistributionallyfairnessmethodsrobustachieve
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Distributionally robust optimization (DRO) can improve the robustness and fairness of learning methods. In this paper, we devise stochastic algorithms for a class of DRO problems including group DRO, subpopulation fairness, and empirical conditional value at risk (CVaR) optimization. Our new algorithms achieve faster convergence rates than existing algorithms for multiple DRO settings. We also provide a new information-theoretic lower bound that implies our bounds are tight for group DRO. Empirically, too, our algorithms outperform known methods.

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Cited by 2 Pith papers

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  2. FAST-CAD: A Fairness-Aware Framework for Non-Contact Stroke Diagnosis

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    FAST-CAD unifies domain-adversarial training and Group-DRO to deliver fair, accurate non-contact stroke diagnosis across 12 demographic subgroups with convergence guarantees.