Proximal Causal Inference With Text Data
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Abstract (arXiv)
Recent text-based causal methods attempt to mitigate confounding bias by estimating proxies of confounding variables that are partially or imperfectly measured from unstructured text data. These approaches, however, assume analysts have supervised labels of the confounders given text for a subset of instances, a constraint that is sometimes infeasible due to data privacy or annotation costs. In this work, we address settings in which an important confounding variable is completely unobserved. We propose a new causal inference method that uses two instances of pre-treatment text data, infers two proxies using two zero-shot models on the separate instances, and applies these proxies in the proximal g-formula. We prove, under certain assumptions about the instances of text and accuracy of the zero-shot predictions, that our method of inferring text-based proxies satisfies identification conditions of the proximal g-formula while other seemingly reasonable proposals do not. To address untestable assumptions associated with our method and the proximal g-formula, we further propose an odds ratio falsification heuristic that flags when to proceed with downstream effect estimation using the inferred proxies. We evaluate our method in synthetic and semi-synthetic settings -- the latter with real-world clinical notes from MIMIC-III and open large language models for zero-shot prediction -- and find that our method produces estimates with low bias. We believe that this text-based design of proxies allows for the use of proximal causal inference in a wider range of scenarios, particularly those for which obtaining suitable proxies from structured data is difficult.
Key facts. Cited by 7 papers in the map (data through 13 Oct 2026). Builds on 24 of its 61 references that are in the map. First posted on arXiv 12 Jan 2024.
Builds on
24 of 61 references.
References · 24
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- 2020Text and Causal Inference: A Review of Using Text to Remove Confounding from Causal Estimatescited by 59
12 more
- 2021Proximal Causal Learning with Kernels: Two-Stage Estimation and Moment Restrictioncited by 55
- 2021Causal Inference Under Unmeasured Confounding With Negative Controls: A Minimax Learning Approachcited by 43
- 2020Causal Effects of Linguistic Propertiescited by 39
- 2018Benchmarking Framework for Performance-Evaluation of Causal Inference Analysiscited by 33
- 2018Challenges of Using Text Classifiers for Causal Inferencecited by 33
- 2019The Case for Evaluating Causal Models Using Interventional Measures and Empirical Datacited by 30
- 2019Estimating Causal Effects of Tone in Online Debatescited by 19
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Built on by
Citing papers per year: 2025: 2; 2026: 5.
7 papers.
- 2026Towards Multimodal Time Series Anomaly Detection with Semantic Alignment and Condensed Interactioncited by 3
- 2025LLM-Driven Treatment Effect Estimation Under Inference Time Text Confoundingcited by 2
- 2025Annotation-Assisted Learning of Treatment Policies From Multimodal Electronic Health Recordscited by 0
- 2026Predicting Causal Effects from Natural Language Queries using Structured Representationscited by 0
- 2026Uncertainty-Guided LLM Semantic Augmentation for Heterogeneous Treatment Effect Estimationcited by 0
- 2026Exploring Sparse Autoencoders in Text-Based Causal Confounding Adjustmentcited by 0
- 2026Proximal Balancing for Causal Effect Estimation under Unmeasured Confoundingcited by 0
- 2026Proximal Balancing for Causal Effect Estimation under Unmeasured Confounding30 Sep 2026
- 2026Exploring Sparse Autoencoders in Text-Based Causal Confounding Adjustment1 Sep 2026
- 2026Uncertainty-Guided LLM Semantic Augmentation for Heterogeneous Treatment Effect Estimation29 Jul 2026
- 2026Predicting Causal Effects from Natural Language Queries using Structured Representations28 May 2026
- 2026Towards Multimodal Time Series Anomaly Detection with Semantic Alignment and Condensed Interaction23 Mar 2026
- 2025Annotation-Assisted Learning of Treatment Policies From Multimodal Electronic Health Records28 Jul 2025
- 2025LLM-Driven Treatment Effect Estimation Under Inference Time Text Confounding3 Jul 2025