Randomization-based, Bayesian inference of causal effects

Leavitt Thomas ()
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Leavitt Thomas: Marxe School of Public and International Affairs, Baruch College, City University of New York (CUNY), 135 East 22nd Street, New York, NY 10011, USA

Journal of Causal Inference, 2023, vol. 11, issue 1, 25

Abstract: Bayesian causal inference in randomized experiments usually imposes model-based structure on potential outcomes. Yet causal inferences from randomized experiments are especially credible because they depend on a known assignment process, not a probability model of potential outcomes. In this article, I derive a randomization-based procedure for Bayesian inference of causal effects in a finite population setting. I formally show that this procedure satisfies Bayesian analogues of unbiasedness and consistency under weak conditions on a prior distribution. Unlike existing model-based methods of Bayesian causal inference, my procedure supposes neither probability models that generate potential outcomes nor independent and identically distributed random sampling. Unlike existing randomization-based methods of Bayesian causal inference, my procedure does not suppose that potential outcomes are discrete and bounded. Consequently, researchers can reap the benefits of Bayesian inference without sacrificing the properties that make inferences from randomized experiments especially credible in the first place.

Keywords: design-based inference; potential outcomes; finite population inference; limited information likelihood (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:bpj:causin:v:11:y:2023:i:1:p:25:n:1

DOI: 10.1515/jci-2022-0025

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