A factorization criterion for acyclic directed mixed graphs

06/26/2014

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by   Thomas S. Richardson, et al.

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Acyclic directed mixed graphs, also known as semi-Markov models represent the conditional independence structure induced on an observed margin by a DAG model with latent variables. In this paper we present a factorization criterion for these models that is equivalent to the global Markov property given by (the natural extension of) d-separation.