Least squares estimation of a shift in linear processes
AbstractThis paper considers a mean shift with an unknown shift point in a linear process and estimates the unknown shift point (change point) by the method of least squares. Pre-shift and post-shift means are estimated concurrently with the change point. The consistency and the rate of convergence for the estimated change point are established. The asymptotic distribution for the change point estimator is obtained when the magnitude of shift is small. It is shown that serial correlation affects the variance of the change point estimator via the sum of the coefficients (impulses) of the linear process. When the underlying process is an ARMA, a mean shift causes overestimation of its order. A simple procedure is suggested to mitigate the bias in order estimation.
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Bibliographic InfoPaper provided by University Library of Munich, Germany in its series MPRA Paper with number 32878.
Date of creation: 16 Feb 1993
Date of revision:
Publication status: Published in Journal of Time Series Analysis 5.15(1994): pp. 453-472
Mean shift; linear processes; change point; rate of convergence; order estimation; generalized residuals;
Find related papers by JEL classification:
- C13 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Estimation: General
- C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models &bull Diffusion Processes
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