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Inferring deterministic causal relations
Proceedings of the 26th Conference on Uncertainty in Artificial Intelligence, PMLR R8:159-166, 2010.
Abstract
We consider two variables that are related to each other by an invertible function. While it has previously been shown that the depen- dence structure of the noise can provide hints to determine which of the two variables is the cause, we presently show that even in the de- terministic (noise-free) case, there are asym- metries that can be exploited for causal in- ference. Our method is based on the idea that if the function and the probability den- sity of the cause are chosen independently, then the distribution of the effect will, in a certain sense, depend on the function. We provide a theoretical analysis of this method, showing that it also works in the low noise regime, and link it to information geometry. We report strong empirical results on various real-world data sets from different domains.