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EXACT LOCAL WHITTLE ESTIMATION IN LONG MEMORY TIME SERIES WITH MULTIPLE POLES

Published online by Cambridge University Press:  05 March 2020

Josu Arteche*
Affiliation:
University of the Basque Country UPV/EHU
*
Address correspondence to Josu Arteche, Department of Econometrics and Statistics, University of the Basque Country UPV/EHU, Bilbao 48015 Spain; e-mail: josu.arteche@ehu.eus.
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Abstract

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A generalization of the Exact Local Whittle estimator in Shimotsu and Phillips (2005, Annals of Statistics 33, 1890–1933) is proposed for jointly estimating all the memory parameters in general long memory time series that possibly display standard, seasonal, and/or other cyclical strong persistence. Consistency and asymptotic normality are proven for stationary, nonstationary, and noninvertible series, permitting straightforward standard inference of interesting hypotheses such as the existence of unit roots and equality of memory parameters at some or all seasonal frequencies, which can be used as a prior test for the application of seasonal differencing filters. The effects of unknown deterministic terms are also discussed. Finally, the finite sample performance is analyzed in an extensive Monte Carlo exercise and an application to an U.S. Industrial Production index.

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Type
ARTICLES
Copyright
© Cambridge University Press 2020
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