Oracally efficient estimation of autoregressive error distribution with simultaneous confidence band
Abstract
We propose kernel estimator for the distribution function of unobserved errors in autoregressive time series, based on residuals computed by estimating the autoregressive coefficients with the Yule-Walker method. Under mild assumptions, we establish oracle efficiency of the proposed estimator, that is, it is asymptotically as efficient as the kernel estimator of the distribution function based on the unobserved error sequence itself. Applying the result of Wang, Cheng and Yang [J. Nonparametr. Stat. 25 (2013) 395-407], the proposed estimator is also asymptotically indistinguishable from the empirical distribution function based on the unobserved errors. A smooth simultaneous confidence band (SCB) is then constructed based on the proposed smooth distribution estimator and Kolmogorov distribution. Simulation examples support the asymptotic theory.
Cite
@article{arxiv.1405.6044,
title = {Oracally efficient estimation of autoregressive error distribution with simultaneous confidence band},
author = {Jiangyan Wang and Rong Liu and Fuxia Cheng and Lijian Yang},
journal= {arXiv preprint arXiv:1405.6044},
year = {2014}
}
Comments
Published in at http://dx.doi.org/10.1214/13-AOS1197 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)