Asymptotic Theory for Zero Energy Functionals with Nonparametric Regression Applications

A local limit theorem is given for the sample mean of a zero energy function of a nonstationary time series involving twin numerical sequences that pass to infinity. The result is applicable in certain nonparametric kernel density estimation and regression problems where the relevant quantities are...

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Bibliographic Details
Main Authors: WANG, Qiying, Peter C. B. PHILLIPS
Format: text
Language:English
Published: Institutional Knowledge at Singapore Management University 2011
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Online Access:https://ink.library.smu.edu.sg/soe_research/1822
https://ink.library.smu.edu.sg/context/soe_research/article/2821/viewcontent/AsymptoticTheoryZeroEnergy_2011.pdf
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Institution: Singapore Management University
Language: English
Description
Summary:A local limit theorem is given for the sample mean of a zero energy function of a nonstationary time series involving twin numerical sequences that pass to infinity. The result is applicable in certain nonparametric kernel density estimation and regression problems where the relevant quantities are functions of both sample size and bandwidth. An interesting outcome of the theory in nonparametric regression is that the linear term is eliminated from the asymptotic bias. In consequence and in contrast to the stationary case, the Nadaraya-Watson estimator has the same limit distribution (to the second order including bias) as the local linear nonparametric estimator.