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Doubly Robust Estimation in Missing Data and Causal Inference Models

2005/12/01 by Heejung Bang, James M. Robins · 2,002 citations
Mathematics · Psychology · #Advanced Causal Inference Techniques #Artificial intelligence #Bayesian probability #Causal inference #Computer science #Counterfactual thinking #Econometrics #Estimator #Inference #Inverse probability #Inverse probability weighting #Mathematics #Missing data #Observational study #Posterior probability #Psychology #Statistical Methods and Bayesian Inference #Statistical Methods in Clinical Trials #Statistics

paper · doi:10.1111/j.1541-0420.2005.00377.x

published in Biometrics 61(4), 962-973 (Oxford University Press)

openalex publication_date 2005/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/02

Abstract

The goal of this article is to construct doubly robust (DR) estimators in ignorable missing data and causal inference models. In a missing data model, an estimator is DR if it remains consistent when either (but not necessarily both) a model for the missingness mechanism or a model for the distribution of the complete data is correctly specified. Because with observational data one can never be sure that either a missingness model or a complete data model is correct, perhaps the best that can be hoped for is to find a DR estimator. DR estimators, in contrast to standard likelihood-based or (nonaugmented) inverse probability-weighted estimators, give the analyst two chances, instead of only one, to make a valid inference. In a causal inference model, an estimator is DR if it remains consistent when either a model for the treatment assignment mechanism or a model for the distribution of the counterfactual data is correctly specified. Because with observational data one can never be sure that a model for the treatment assignment mechanism or a model for the counterfactual data is correct, inference based on DR estimators should improve upon previous approaches. Indeed, we present the results of simulation studies which demonstrate that the finite sample performance of DR estimators is as impressive as theory would predict. The proposed method is applied to a cardiovascular clinical trial.

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