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The fair-ranking problem, which asks to rank a given set of items to maximize utility subject to group fairness constraints, has received attention in the fairness, information retrieval, and machine learning literature. Recent works,…

Machine Learning · Computer Science 2022-12-01 Anay Mehrotra , Nisheeth K. Vishnoi

We study the problem of model aggregation within the Wasserstein space for probability measures on the real line. Given a fixed finite collection of candidate probability models, we consider the associated class of Wasserstein barycenters…

Recommendation fairness has attracted great attention recently. In real-world systems, users usually have multiple sensitive attributes (e.g. age, gender, and occupation), and users may not want their recommendation results influenced by…

Information Retrieval · Computer Science 2022-07-06 Yiqing Wu , Ruobing Xie , Yongchun Zhu , Fuzhen Zhuang , Xiang Ao , Xu Zhang , Leyu Lin , Qing He

We present a flexible framework for learning predictive models that approximately satisfy the equalized odds notion of fairness. This is achieved by introducing a general discrepancy functional that rigorously quantifies violations of this…

Machine Learning · Statistics 2020-06-09 Yaniv Romano , Stephen Bates , Emmanuel J. Candès

Fairness and interpretability play an important role in the adoption of decision-making algorithms across many application domains. These requirements are intended to avoid undesirable group differences and to alleviate concerns related to…

Econometrics · Economics 2025-09-16 Nora Bearth , Michael Lechner , Jana Mareckova , Fabian Muny

Improving the fairness of machine learning models is a nuanced task that requires decision makers to reason about multiple, conflicting criteria. The majority of fair machine learning methods transform the error-fairness trade-off into a…

Neural and Evolutionary Computing · Computer Science 2023-04-25 William G. La Cava

The treatment of fairness in decision-making literature usually involves quantifying fairness using objective measures. This work takes a critical stance to highlight the limitations of these approaches (group fairness and individual…

Computers and Society · Computer Science 2024-07-03 Sarra Tajouri , Alexis Tsoukiàs

This paper introduces marginal fairness, a new individual fairness notion for equitable decision-making in the presence of protected attributes such as gender, race, and religion. This criterion ensures that decisions based on generalized…

Machine Learning · Statistics 2025-05-27 Fei Huang , Silvana M. Pesenti

In medical image diagnosis, fairness has become increasingly crucial. Without bias mitigation, deploying unfair AI would harm the interests of the underprivileged population and potentially tear society apart. Recent research addresses…

Computer Vision and Pattern Recognition · Computer Science 2024-05-06 Ching-Hao Chiu , Yu-Jen Chen , Yawen Wu , Yiyu Shi , Tsung-Yi Ho

Problem definition: A key challenge in supervised learning is data scarcity, which can cause prediction models to overfit to the training data and perform poorly out of sample. A contemporary approach to combat overfitting is offered by…

Optimization and Control · Mathematics 2025-10-10 Reza Belbasi , Aras Selvi , Wolfram Wiesemann

Wasserstein barycenters provide a geometric notion of the weighted average of probability measures based on optimal transport. In this paper, we present a scalable algorithm to compute Wasserstein-2 barycenters given sample access to the…

Machine Learning · Computer Science 2022-01-02 Alexander Korotin , Lingxiao Li , Justin Solomon , Evgeny Burnaev

Equity in real-world sequential decision problems can be enforced using fairness-aware methods. Therefore, we require algorithms that can make suitable and transparent trade-offs between performance and the desired fairness notions. As the…

Machine Learning · Computer Science 2025-09-29 Alexandra Cimpean , Nicole Orzan , Catholijn Jonker , Pieter Libin , Ann Nowé

Wasserstein barycenters define averages of probability measures in a geometrically meaningful way. Their use is increasingly popular in applied fields, such as image, geometry or language processing. In these fields however, the probability…

Numerical Analysis · Mathematics 2023-03-13 Guillaume Carlier , Alex Delalande , Quentin Merigot

Modern machine learning (ML) models are becoming increasingly popular and are widely used in decision-making systems. However, studies have shown critical issues of ML discrimination and unfairness, which hinder their adoption on high-stake…

Machine Learning · Computer Science 2023-06-01 Yueqing Liang , Canyu Chen , Tian Tian , Kai Shu

Algorithmic fairness has become an important machine learning problem, especially for mission-critical Web applications. This work presents a self-supervised model, called DualFair, that can debias sensitive attributes like gender and race…

Machine Learning · Computer Science 2023-03-16 Sungwon Han , Seungeon Lee , Fangzhao Wu , Sundong Kim , Chuhan Wu , Xiting Wang , Xing Xie , Meeyoung Cha

Machine Learning algorithms are ubiquitous in key decision-making contexts such as justice, healthcare and finance, which has spawned a great demand for fairness in these procedures. However, the theoretical properties of such models in…

Machine Learning · Statistics 2026-01-14 Arturo Pérez-Peralta , Sandra Benítez-Peña , Rosa E. Lillo

Ensuring that classifiers are non-discriminatory or fair with respect to a sensitive feature (e.g., race or gender) is a topical problem. Progress in this task requires fixing a definition of fairness, and there have been several proposals…

Machine Learning · Computer Science 2019-01-28 Robert C. Williamson , Aditya Krishna Menon

We study in this paper a variant of Wasserstein barycenter problem, which we refer to as tree-Wasserstein barycenter, by leveraging a specific class of ground metrics, namely tree metrics, for Wasserstein distance. Drawing on the tree…

Machine Learning · Statistics 2020-02-28 Tam Le , Viet Huynh , Nhat Ho , Dinh Phung , Makoto Yamada

There has been much interest recently in developing fair clustering algorithms that seek to do justice to the representation of groups defined along sensitive attributes such as race and gender. We observe that clustering algorithms could…

Machine Learning · Computer Science 2023-01-02 Stanley Simoes , Deepak P , Muiris MacCarthaigh

Peer prediction mechanisms incentivize agents to truthfully report their signals even in the absence of verification by comparing agents' reports with those of their peers. In the detail-free multi-task setting, agents respond to multiple…

Computer Science and Game Theory · Computer Science 2021-08-27 Grant Schoenebeck , Fang-Yi Yu