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Innovational Outlier Unit Root Tests with an Endogenously Determined Break in Level

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  • Harvey, David I
  • Leybourne, Stephen J
  • Newbold, Paul

Abstract

We show that a standard unit root test that permits an endogenously determined break in level can generate spurious rejections in practically interesting sample sizes when a large break occurs under the null hypothesis. This problem, which occurs for breaks of the innovational outlier type, can be corrected through a simple modification of the test procedure. Copyright 2001 by Blackwell Publishing Ltd

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Bibliographic Info

Article provided by Department of Economics, University of Oxford in its journal Oxford Bulletin of Economics & Statistics.

Volume (Year): 63 (2001)
Issue (Month): 5 (December)
Pages: 559-75

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Handle: RePEc:bla:obuest:v:63:y:2001:i:5:p:559-75

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Cited by:
  1. Junsoo Lee & Mark C. Strazicich, 2013. "Minimum LM unit root test with one structural break," Economics Bulletin, AccessEcon, vol. 33(4), pages 2483-2492.
  2. Paresh Kumar Narayan & Stephan Popp, 2009. "A New Unit Root Test with Two Structural Breaks in Level and Slope at Unknown Time," Economics Series 2009_11, Deakin University, Faculty of Business and Law, School of Accounting, Economics and Finance.
  3. Paresh Kumar Narayan & Stephan Popp, 2013. "Size and power properties of structural break unit root tests," Applied Economics, Taylor & Francis Journals, vol. 45(6), pages 721-728, February.
  4. Luis C. Nunes, 2004. "LM-Type tests for a Unit Root Allowing for a Break in Trend," Econometric Society 2004 Australasian Meetings 190, Econometric Society.
  5. Charles, Amélie & Darné, Olivier, 2012. "Trends and random walks in macroeconomic time series: A reappraisal," Journal of Macroeconomics, Elsevier, vol. 34(1), pages 167-180.
  6. Popp, Stephan, 2007. "Modified seasonal unit root test with seasonal level shifts at unknown time," Economics Letters, Elsevier, vol. 97(2), pages 111-117, November.
  7. Popp, Stephan, 2007. "Identification of the true break date in innovational outlier unit root tests," IBES Diskussionsbeiträge 152, University of Duisburg-Essen, Faculty for Economics and Business Administration.
  8. Harvey, David I. & Leybourne, Stephen J. & Newbold, Paul, 2002. "Seasonal unit root tests with seasonal mean shifts," Economics Letters, Elsevier, vol. 76(2), pages 295-302, July.
  9. Banerjee, Anindya & Urga, Giovanni, 2005. "Modelling structural breaks, long memory and stock market volatility: an overview," Journal of Econometrics, Elsevier, vol. 129(1-2), pages 1-34.
  10. Stephan Popp, 2008. "A Nonlinear Unit Root Test in the Presence of an Unknown Break," Ruhr Economic Papers 0045, Rheinisch-Westfälisches Institut für Wirtschaftsforschung, Ruhr-Universität Bochum, Universität Dortmund, Universität Duisburg-Essen.
  11. Kojo Menyah & Yemane Wolde-Rufael, 2012. "Wagner'S Law Revisited: A Note From South Africa," South African Journal of Economics, Economic Society of South Africa, vol. 80(2), pages 200-208, 06.

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