On nonparametric inference for spatial regression models under domain expanding and infill observations
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In this paper, we develop nonparametric inference on spatial regression models as an extension of Lu and Tjøstheim (2014), which develops nonparametric inference on density functions of stationary spatial processes under domain expanding and infill (DEI) asymptotics. In particular, we derive multivariate central limit theorems of mean and variance functions of nonparametric spatial regression models. Build upon those results, we propose a method to construct confidence bands for mean and variance functions. We also propose a practical method for bandwidth selection.
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