Discovering Cyclic Causal Models by Independent Components Analysis

author: Gustavo Lacerda, Carnegie Mellon University
published: July 30, 2008,   recorded: July 2008,   views: 282
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Description

We generalize Shimizu et al's (2006) ICA-based approach for discovering linear non-Gaussian acyclic (LiNGAM) Structural Equation Models (SEMs) from causally sufficient, continuous-valued observational data. By relaxing the assumption that the generating SEM's graph is acyclic, we solve the more general problem of linear non-Gaussian (LiNG) SEM discovery. LiNG discovery algorithms output the distribution equivalence class of SEMs which, in the large sample limit, represents the population distribution. We apply a LiNG discovery algorithm to simulated data. Finally, we give sufficient conditions under which only one of the SEMs in the output class is stable.

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Download slides icon Download slides: uai08_lacerda_dccm.pdf (391.4 KB)

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