El Ghouch, Anouar
[UCL]
Genton, Marc G.
We propose a new approach to conditional quantile function estimation that combines both parametric and nonparametric techniques. At each design point, a global, possibly incorrect, pilot parametric model is locally adjusted through a kernel smoothing fit. The resulting quantile regression estimator behaves like a parametric estimator when the latter is correct and converges to the nonparametric solution as the parametric start deviates from the true underlying model. We give a Bahadur-type representation of the proposed estimator from which consistency and asymptotic normality are derived under an α-mixing assumption. We also propose a practical bandwidth selector based on the plug-in principle and discuss the numerical implementation of the new estimator. Finally, we investigate the performance of the proposed method via simulations and illustrate the methodology with a data example.
Bibliographic reference |
El Ghouch, Anouar ; Genton, Marc G.. Local Polynomial Quantile Regression With Parametric Features. In: Journal of the American Statistical Association, Vol. 104, no.488, p. 1416-1429 (2009) |
Permanent URL |
http://hdl.handle.net/2078.1/152526 |