Medium band least squares estimation of fractional cointegration in the presence of low-frequency contamination
Bent Jesper Christensen () and
Rasmus Tangsgaard Varneskov
Journal of Econometrics, 2017, vol. 197, issue 2, 218-244
This paper introduces a new estimator of the fractional cointegrating vector between stationary long memory processes that is robust to low-frequency contamination such as random level shifts, outliers, Markov switching means, and certain deterministic trends. In particular, the proposed medium band least squares (MBLS) estimator uses sample-size-dependent trimming of frequencies in the vicinity of the origin to account for such contamination. Consistency and asymptotic normality of the MBLS estimator are established, a feasible inference procedure is proposed, and rigorous tools for assessing the cointegration strength and testing MBLS against the existing narrow band least squares estimator are developed. Finally, the asymptotic framework for the MBLS estimator is used to provide new perspectives on volatility factors in an empirical application to long-span realized variance series for S&P 500 equities.
Keywords: Deterministic trends; Factor models; Fractional cointegration; Long memory; Realized variance; Semiparametric estimation; Structural change (search for similar items in EconPapers)
JEL-codes: C12 C14 C32 C58 (search for similar items in EconPapers)
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Working Paper: Medium Band Least Squares Estimation of Fractional Cointegration in the Presence of Low-Frequency Contamination (2015)
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Persistent link: https://EconPapers.repec.org/RePEc:eee:econom:v:197:y:2017:i:2:p:218-244
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