期刊
ENTROPY
卷 21, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/e21100975
关键词
directed information; conditional mutual information; directed mutual information; confounding; causal effect; back-door criterion; average treatment effect; potential outcomes; time series; chain graph
资金
- Swiss National Science Foundation [CR32I2159682]
Modelling causal relationships has become popular across various disciplines. Most common frameworks for causality are the Pearlian causal directed acyclic graphs (DAGs) and the Neyman-Rubin potential outcome framework. In this paper, we propose an information theoretic framework for causal effect quantification. To this end, we formulate a two step causal deduction procedure in the Pearl and Rubin frameworks and introduce its equivalent which uses information theoretic terms only. The first step of the procedure consists of ensuring no confounding or finding an adjustment set with directed information. In the second step, the causal effect is quantified. We subsequently unify previous definitions of directed information present in the literature and clarify the confusion surrounding them. We also motivate using chain graphs for directed information in time series and extend our approach to chain graphs. The proposed approach serves as a translation between causality modelling and information theory.
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