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Change-in-mean tests in long-memory time series: a review of recent developments

Kai Wenger (), Christian Leschinski and Philipp Sibbertsen ()
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Christian Leschinski: Leibniz University Hannover

AStA Advances in Statistical Analysis, 2019, vol. 103, issue 2, 237-256

Abstract: Abstract It is well known that standard tests for a mean shift are invalid in long-range dependent time series. Therefore, several long-memory robust extensions of standard testing principles for a change-in-mean have been proposed in the literature. These can be divided into two groups: those that utilize consistent estimates of the long-run variance and self-normalized test statistics. Here, we review this literature and complement it by deriving a new long-memory robust version of the sup-Wald test. Apart from giving a systematic review, we conduct an extensive Monte Carlo study to compare the relative performance of these methods. Special attention is paid to the interaction of the test results with the estimation of the long-memory parameter. Furthermore, we show that the power of self-normalized test statistics can be improved considerably by using an estimator that is robust to mean shifts.

Keywords: Fractional integration; Structural breaks; Long memory (search for similar items in EconPapers)
JEL-codes: C12 C22 (search for similar items in EconPapers)
Date: 2019
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