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arXiv 2502.04763cs.GTcs.LG
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基于k-可加游戏的Shapley值近似

Shapley Value Approximation Based on k-Additive Games

Guilherme Dean Pelegrina, Patrick Kolpaczki, Eyke Hüllermeier

AI总结:

本文提出一种基于k-可加游戏的Shapley值近似方法,用于解决公平分配问题中的计算复杂性问题,通过近似游戏来估计特征或数据点对预测模型性能的贡献。

摘要:

Shapley值是公平分配问题中分配支付给多个代理的常用解决方案。通过博弈论视角,公平分配和Shapley值也可用于机器学习中,以量化特征或数据点对预测模型性能的个体贡献。尽管其受欢迎程度和公理化证明,Shapley值的计算复杂性随涉及实体数量呈指数增长,因此需要近似方法进行可靠估计。我们提出SVA$k_{\text{ADD}}$,一种新的近似方法,拟合一个k-可加替代游戏。通过利用k-可加性,我们能够获得替代游戏的精确Shapley值,然后将这些值作为原始公平分配问题的估计。该方法的有效性通过实证评估并与竞争方法进行比较。

英文摘要:

The Shapley value is the prevalent solution for fair division problems in which a payout is to be divided among multiple agents. By adopting a game-theoretic view, the idea of fair division and the Shapley value can also be used in machine learning to quantify the individual contribution of features or data points to the performance of a predictive model. Despite its popularity and axiomatic justification, the Shapley value suffers from a computational complexity that scales exponentially with the number of entities involved, and hence requires approximation methods for its reliable estimation. We propose SVA$k_{\text{ADD}}$, a novel approximation method that fits a $k$-additive surrogate game. By taking advantage of $k$-additivity, we are able to elicit the exact Shapley values of the surrogate game and then use these values as estimates for the original fair division problem. The efficacy of our method is evaluated empirically and compared to competing methods.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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