Inferring Heterogeneous Causal Effects in Presence of Spatial Confounding
2019-01-28Code Available0· sign in to hype
Muhammad Osama, Dave Zachariah, Thomas B. Schön
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Abstract
We address the problem of inferring the causal effect of an exposure on an outcome across space, using observational data. The data is possibly subject to unmeasured confounding variables which, in a standard approach, must be adjusted for by estimating a nuisance function. Here we develop a method that eliminates the nuisance function, while mitigating the resulting errors-in-variables. The result is a robust and accurate inference method for spatially varying heterogeneous causal effects. The properties of the method are demonstrated on synthetic as well as real data from Germany and the US.