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Panel LM Unit-root Tests with Level Shifts

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Author Info
Kyung-So Im
Junsoo Lee
Margie Tieslau
Abstract

This paper proposes a new panel unit-root test based on the Lagrangian multiplier (LM) principle. We show that the asymptotic distribution of the new panel LM test is not affected by the presence of structural shifts. This result holds under a mild condition that "N"/"T" goes to;"k", where "k" is any finite constant. Our simulation study shows that the panel LM unit-root test is not only robust to the presence of structural shifts, but is more powerful than the popular Im, Pesaran and Shin (IPS) test. We apply our new test to the purchasing power parity (PPP) hypothesis and find strong evidence for PPP. Copyright 2005 Blackwell Publishing Ltd.

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

Volume (Year): 67 (2005)
Issue (Month): 3 (06)
Pages: 393-419
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Handle: RePEc:bla:obuest:v:67:y:2005:i:3:p:393-419

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  1. Guglielmo Maria Caporale & Luis A. Gil-Alana, 2006. "Modelling Structural Breaks In The Us, Uk And Japanese Unemployment Rates," Economics and Finance Discussion Papers 06-10, Economics and Finance Section, School of Social Sciences, Brunel University. [Downloadable!]
  2. 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. [Downloadable!]
  3. Guglielmo Maria Caporale & Luis A. Gil-Alana, 2006. "Modelling Structural Breaks in the US, UK and Japanese Unemployment Rates," CESifo Working Paper Series CESifo Working Paper No. , CESifo GmbH. [Downloadable!]
  4. Basher, Syed A. & Westerlund, Joakim, 2006. "Is there Really a Unit Root in the Inflation Rate? More Evidence from Panel Data Models," MPRA Paper 136, University Library of Munich, Germany. [Downloadable!]
    Other versions:
  5. Luciano Gutierrez, 2005. "Tests for cointegration in panels with regime shifts," Econometrics 0505007, EconWPA. [Downloadable!]
  6. Pui Sun Tam & University of Macau, 2006. "Breaking trend panel unit root tests," Computing in Economics and Finance 2006 341, Society for Computational Economics. [Downloadable!]
  7. Chien-Chiang Lee & Chun-Ping Chang, 2007. "Mean reversion of inflation rates in 19 OECD countries: Evidence from panel Lm unit root tests with structural breaks," Economics Bulletin, Economics Bulletin, vol. 3(23), pages 1-15. [Downloadable!]
  8. Antonia López Villavicencio, 2006. "Real equilibrium exchange rates. A panel data approach for advanced and emerging economies," Working Papers wpdea0605, Department of Applied Economics at Universitat Autonoma of Barcelona. [Downloadable!]
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