Interaction Information for Causal Inference: The Case of Directed Triangle

30 Jan 2017  ·  AmirEmad Ghassami, Negar Kiyavash ·

Interaction information is one of the multivariate generalizations of mutual information, which expresses the amount information shared among a set of variables, beyond the information, which is shared in any proper subset of those variables. Unlike (conditional) mutual information, which is always non-negative, interaction information can be negative. We utilize this property to find the direction of causal influences among variables in a triangle topology under some mild assumptions.

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