Causal Additive Models with Unobserved Causal Paths and Backdoor Paths

• URL: http://arxiv.org/abs/2502.07646v1
• Date: Tue, 11 Feb 2025 15:35:15 GMT
• Title: Causal Additive Models with Unobserved Causal Paths and Backdoor Paths
• Authors: Thong Pham, Takashi Nicholas Maeda, Shohei Shimizu,
• Abstract summary: State-of-the-art methodologies suggest that determining the causal relationship between a pair of variables is infeasible in the presence of an unobserved backdoor or an unobserved causal path. We show that resolving the causal direction is feasible in certain scenarios by incorporating two novel components into the theory.
• Score: 5.142415132534398
• License:
• Abstract: Causal additive models have been employed as tractable yet expressive frameworks for causal discovery involving hidden variables. State-of-the-art methodologies suggest that determining the causal relationship between a pair of variables is infeasible in the presence of an unobserved backdoor or an unobserved causal path. Contrary to this assumption, we theoretically show that resolving the causal direction is feasible in certain scenarios by incorporating two novel components into the theory. The first component introduces a novel characterization of regression sets within independence between regression residuals. The second component leverages conditional independence among the observed variables. We also provide a search algorithm that integrates these innovations and demonstrate its competitive performance against existing methods.

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