The Hardness of Conditional Independence Testing

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• Jonas Peters (University of Copenhagen)
• Monday 15 January 2018, 11:55-12:40
• Seminar Room 1, Newton Institute.

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STSW01 - Theoretical and algorithmic underpinnings of Big Data

Testing for conditional independence between continuous random variables is considered to be a hard statistical problem. We provide a formalization of this result and show that a test with correct size does not have power against any alternative. It is thus impossible to obtain any guarantee if the relationships between the random variables can be arbitrarily complex. We propose a practical test that achieves the correct size if the conditional expectations are smooth enough such that they can be estimated from data. This is joint work with Rajen Shah.

This talk is part of the Isaac Newton Institute Seminar Series series.

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