Applied Mathematics

Volume 4, Issue 10 (October 2013)

ISSN Print: 2152-7385   ISSN Online: 2152-7393

Google-based Impact Factor: 0.58  Citations  

Confounding of Three Binary-Variable Counterfactual Model with DAG

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DOI: 10.4236/am.2013.410189    3,663 Downloads   5,087 Views  
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ABSTRACT

Confounding of three binary-variable counterfactual model with directed acyclic graph (DAG) is discussed in this paper. According to the effect between the control variable and the covariate variable, we investigate three causal counterfactual models: the control variable is independent of the covariate variable, the control variable has the effect on the covariate variable and the covariate variable affects the control variable. Using the ancillary information based on conditional independence hypotheses and ignorability, the sufficient conditions to determine whether the covariate variable is an irrelevant factor or whether there is no confounding in each counterfactual model are obtained.

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Liu, J. and Hu, S. (2013) Confounding of Three Binary-Variable Counterfactual Model with DAG. Applied Mathematics, 4, 1397-1404. doi: 10.4236/am.2013.410189.

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