Variable data driven bandwidth choice in nonparametric quantile regression

Klaus Abberger

No 02/03, CoFE Discussion Papers from University of Konstanz, Center of Finance and Econometrics (CoFE)

Abstract: The choice of a smoothing parameter or bandwidth is crucial when applying non- parametric regression estimators. In nonparametric mean regression various meth- ods for bandwidth selection exists. But in nonparametric quantile regression band- width choice is still an unsolved problem. In this paper a selection procedure for local varying bandwidths based on the asymptotic mean squared error (MSE) of the local linear quantile estimator is discussed. To estimate the unknown quantities of the MSE local linear quantile regression based on cross-validation and local likeli- hood estimation is used.

Keywords: quantile regression; nonparametric regression; conditional quantile estimation; local linear estimation; local bandwidth selection; local likelihood; generalized logistic distribution (search for similar items in EconPapers)
Date: 2002
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