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arXiv 2607.04447cs.LGstat.ML
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最优调整集的知识驱动局部因果发现

Knowledge-Informed Local Causal Discovery of Optimal Adjustment Sets

universite-paris-saclay(巴黎萨克雷大学)

Seong Woo Ahn, Alessandro Leite, José Lucas De Melo Costa, Fabrice Popineau, Bich-Liên Doan, Arpad Rimmel

AI总结:

针对局部因果发现难以在数据稀缺时识别有效调整集的问题,提出b-LOAD算法,将先验边约束融入局部结构学习,动态扩展发现边界,可扩大可识别因果查询集,提升因果效应估计。

摘要:

局部因果发现是全局结构学习的可扩展替代方案。但在数据稀缺时,由于有限样本不确定性等问题,难以识别有效调整集。虽有背景知识,但融入局部因果发现有限。我们提出b-LOAD,将先验边约束纳入局部结构学习,用Meek规则动态扩展发现边界,在合理背景知识下可改进因果效应估计。

英文摘要:

Local causal discovery is a scalable alternative to global structure learning. However, it can struggle to identify valid adjustment sets in data-scarce settings because of finite-sample uncertainty, incomplete local neighborhoods, and unresolved Markov equivalence. Although many application domains provide structured background knowledge, its integration into local causal discovery remains limited. We propose b-LOAD, a knowledge-informed extension of the LOAD algorithm for local discovery of optimal adjustment sets. b-LOAD incorporates prior edge constraints directly into the local structure-learning procedure and uses Meek's rules to expand the discovery frontier dynamically, yielding a knowledge-constrained partially directed graph over the relevant local subgraph. This strategy helps prevent structurally relevant nodes introduced by prior knowledge from being excluded by local search. We prove that, under sound background knowledge, the procedure monotonically refines the admissible equivalence class and can enlarge the set of identifiable causal queries, enabling recovery of optimal adjustment sets that are not identifiable from observational conditional-independence information alone. Empirically, b-LOAD improves downstream causal effect estimation relative to purely data-driven and standard knowledge-augmented baselines, particularly in data-scarce and structurally complex regimes. Results on real-world biological networks show that locally targeted prior knowledge provides the largest gains and remains beneficial under moderate structural noise. These findings position b-LOAD as a scalable approach for converting fragmented domain knowledge into more reliable causal-effect estimation.

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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