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  Information-geometric approach to inferring causal directions

Janzing, D., Mooij, J., Zhang, K., Lemeire, J., Zscheischler, J., Daniušis, P., et al. (2012). Information-geometric approach to inferring causal directions. Artificial Intelligence, 182-183, 1-31. doi:10.1016/j.artint.2012.01.002.

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Janzing, D1, Autor           
Mooij, J, Autor           
Zhang, K1, Autor           
Lemeire, J, Autor
Zscheischler, J1, Autor
Daniušis, P, Autor           
Steudel, B, Autor           
Schölkopf, B1, Autor           
Affiliations:
1Dept. Empirical Inference, Max Planck Institute for Intelligent System, Max Planck Society, ou_1497647              

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 Zusammenfassung: While conventional approaches to causal inference are mainly based on conditional (in)dependences, recent methods also account for the shape of (conditional) distributions. The idea is that the causal hypothesis “X causes Y” imposes that the marginal distribution PX and the conditional distribution PY|X represent independent mechanisms of nature. Recently it has been postulated that the shortest description of the joint distribution PX,Y should therefore be given by separate descriptions of PX and PY|X. Since description length in the sense of Kolmogorov complexity is uncomputable, practical implementations rely on other notions of independence. Here we define independence via orthogonality in information space. This way, we can explicitly describe the kind of dependence that occurs between PY and PX|Y making the causal hypothesis “Y causes X” implausible. Remarkably, this asymmetry between cause and effect becomes particularly simple if X and Y are deterministically related. We present an inference method that works in this case. We also discuss some theoretical results for the non-deterministic case although it is not clear how to employ them for a more general inference method.

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 Datum: 2012-05
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: DOI: 10.1016/j.artint.2012.01.002
BibTex Citekey: JanzingMZLZDSS2012
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Titel: Artificial Intelligence
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 182-183 Artikelnummer: - Start- / Endseite: 1 - 31 Identifikator: -