Mean and Autocovariance Function Estimation Near the Boundary of Stationarity

We analyze the applicability of standard normal asymptotic theory for linear process models near the boundary of stationarity. Limit results are given for estimation of the mean, autocovariance and autocorrelation functions within the broad region of stationarity that includes near boundary cases wh...

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Bibliographic Details
Main Authors: GIRAITIS, Liudas, PHILLIPS, Peter C. B.
Format: text
Language:English
Published: Institutional Knowledge at Singapore Management University 2012
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Online Access:https://ink.library.smu.edu.sg/soe_research/1831
https://ink.library.smu.edu.sg/context/soe_research/article/2830/viewcontent/MeanAutocovarianceFunctionEstimation_2012.pdf
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Institution: Singapore Management University
Language: English
Description
Summary:We analyze the applicability of standard normal asymptotic theory for linear process models near the boundary of stationarity. Limit results are given for estimation of the mean, autocovariance and autocorrelation functions within the broad region of stationarity that includes near boundary cases which vary with the sample size. The rate of consistency and the validity of the normal asymptotic approximation for the corresponding estimators is determined both by the sample size n and a parameter measuring the proximity of the model to the unit root boundary. (C) 2012 Elsevier B.V. All rights reserved.