Estimation of the Autocorrelation Function of a Stationary Time Series with Missing Observations

Yoshihiro Yajima and Haruhisa Nishino
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Yoshihiro Yajima: Faculty of Economics, University of Tokyo.
Haruhisa Nishino: Faculty of Economics, University of Tokyo.

No 98-F-1, CIRJE F-Series from CIRJE, Faculty of Economics, University of Tokyo

Abstract: We consider three estimators of the autocorrelation function for a stationary process with missing observations. The first estimator is linked with the Yule-Walker estimator, the second one the least squares estimator, and the third one the sample correlation coefficient. We clarify their asymptotic differences and derive asymptotic distributions for both short-memory and long-memory models. In most of short-memory models the third estimator has smaller asymptotic variance than the others. On the other hand, if a process follows a long-memory model and its spectral density function is not square integrable, then the asymptotic distributions of the three estimators are all the same and the distribution is still the same as that of estimator under complete sampling too.

Pages: 40 pages
Date: 1998-01
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Persistent link: https://EconPapers.repec.org/RePEc:tky:fseres:98f01

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