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Desheng Ouyang, Qi Li and Jeffrey Racine ()

Econometric Theory, 2009, vol. 25, issue 1, 1-42

Abstract: We consider the problem of estimating a nonparametric regression model containing categorical regressors only. We investigate the theoretical properties of least squares cross-validated smoothing parameter selection, establish the rate of convergence (to zero) of the smoothing parameters for relevant regressors, and show that there is a high probability that the smoothing parameters for irrelevant regressors converge to their upper bound values, thereby automatically smoothing out the irrelevant regressors. A small-scale simulation study shows that the proposed cross-validation-based estimator performs well in finite-sample settings.

Date: 2009
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Handle: RePEc:cup:etheor:v:25:y:2009:i:01:p:1-42_09