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Size performance of the Lagrange Multiplier (LM) unit root test in the presence of a neglected break under the null

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  • Dimitrios Vougas

Abstract

Via simulation, the size of the lagrange multiplier (LM) unit root test is examined, when there is a neglected level or trend break under the null hypothesis. It is found that unlike other more popular unit root tests in the literature, the size of the LM is not distorted/inflated. Thus, rejections of the LM tests must not be viewed as spurious with respect to this issue of neglected breaks.

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  • Dimitrios Vougas, 2008. "Size performance of the Lagrange Multiplier (LM) unit root test in the presence of a neglected break under the null," Applied Economics Letters, Taylor & Francis Journals, vol. 15(9), pages 701-705.
    • Handle: RePEc:taf:apeclt:v:15:y:2008:i:9:p:701-705
    DOI: 10.1080/13504850600722120
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    References listed on IDEAS

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    1. Amsler, Christine & Lee, Junsoo, 1995. "An LM Test for a Unit Root in the Presence of a Structural Change," Econometric Theory, Cambridge University Press, vol. 11(2), pages 359-368, February.
    2. Junsoo Lee & Mark C. Strazicich, 2003. "Minimum Lagrange Multiplier Unit Root Test with Two Structural Breaks," The Review of Economics and Statistics, MIT Press, vol. 85(4), pages 1082-1089, November.
    3. Leybourne, Stephen J. & C. Mills, Terence & Newbold, Paul, 1998. "Spurious rejections by Dickey-Fuller tests in the presence of a break under the null," Journal of Econometrics, Elsevier, vol. 87(1), pages 191-203, August.
    4. Dimitrios Vougas, 2007. "Modification of the LM unit root test," Applied Economics Letters, Taylor & Francis Journals, vol. 14(12), pages 913-917.
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