Do Finetti: On Causal Effects for Exchangeable Data

• URL: http://arxiv.org/abs/2405.18836v1
• Date: Wed, 29 May 2024 07:31:18 GMT
• Title: Do Finetti: On Causal Effects for Exchangeable Data
• Authors: Siyuan Guo, Chi Zhang, Karthika Mohan, Ferenc Huszár, Bernhard Schölkopf,
• Abstract summary: We study causal effect estimation in a setting where the data are not i.i.d. We focus on exchangeable data satisfying an assumption of independent causal mechanisms.
• Score: 45.96632286841583
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We study causal effect estimation in a setting where the data are not i.i.d. (independent and identically distributed). We focus on exchangeable data satisfying an assumption of independent causal mechanisms. Traditional causal effect estimation frameworks, e.g., relying on structural causal models and do-calculus, are typically limited to i.i.d. data and do not extend to more general exchangeable generative processes, which naturally arise in multi-environment data. To address this gap, we develop a generalized framework for exchangeable data and introduce a truncated factorization formula that facilitates both the identification and estimation of causal effects in our setting. To illustrate potential applications, we introduce a causal P\'olya urn model and demonstrate how intervention propagates effects in exchangeable data settings. Finally, we develop an algorithm that performs simultaneous causal discovery and effect estimation given multi-environment data.

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