Fairness in multi-class multi-group classification problems via contextial coherent risk measures

2026-08-31

AI Summary

本文提出了一种基于连贯风险度量理论的新方法，用于解决多类别分类问题中的公平性挑战，特别是在存在多个敏感属性值的情况下。

Abstract

We propose a new design of fair classifiers for multi-class classification problems in the presence of vector-valued sensitive attributes. In that scenario each sensitive attribute has multiple values and forms several groups relevant to the fairness consideration. Naturally those groups are overlapping and one should also analyze the interaction of factors. Additionally, the decision makers aided by the classification should not violate individual rights at the expense of satisfying fairness metrics at the group level. We propose an approach using the theory and methods of coherent measures of risk aiming at resolving the fairness challenges. Further, we propose a specialized numerical method for solving the resulting optimization problem. The method scales well with the increase of the number of observations. Additionally, we note that the obtained classifier is robust with respect to corrupted data or to situation when data is scarce. We demonstrate the advantages of the proposed framework in comparison to the support-vector machine framework and other methods handling fairness.

Problem

• fairness
• multi-class classification
• sensitive attributes
• group level
• individual rights

Innovation

• coherent measures of risk
• fair classifiers
• multi-class classification
• sensitive attributes
• numerical method