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Some Cautions on the Use of the LLC Panel Unit Root Test

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Listed author(s):
  • Westerlund Joakim

    (METEOR)

Abstract

One of the single most cited studies within the field of nonstationary panel data analysis is that of LLC (Levin, Lin and Chu, 2002. Unit Root\linebreak Tests in Panel Data: Asymptotic and Finite Sample Properties. \emph{Journal of Econometrics} 98, 1-24), in which the authors propose a test for a common unit root in the panel. Using both theoretical arguments and simulation evidence, we show that this test generally suffers from serious bias when combined with most commonly used rules for lag length and bandwidth selection. To remedy this bias effect, we propose a slightly modified test that performs well in small samples and that is computationally more convenient than the LLC test.

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Paper provided by Maastricht University, Maastricht Research School of Economics of Technology and Organization (METEOR) in its series Research Memorandum with number 055.

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Date of creation: 2006
Handle: RePEc:unm:umamet:2006055
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Keywords: econometrics;

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  1. John Y. Campbell & Pierre Perron, 1991. "Pitfalls and Opportunities: What Macroeconomists Should Know About Unit Roots," NBER Chapters,in: NBER Macroeconomics Annual 1991, Volume 6, pages 141-220 National Bureau of Economic Research, Inc.
  2. repec:bla:restud:v:57:y:1990:i:1:p:99-125 is not listed on IDEAS
  3. Moon, H.R.Hyungsik Roger & Perron, Benoit, 2004. "Testing for a unit root in panels with dynamic factors," Journal of Econometrics, Elsevier, vol. 122(1), pages 81-126, September.
  4. Kristian Jönsson, 2005. "Cross-sectional Dependency and Size Distortion in a Small-sample Homogeneous Panel Data Unit Root Test," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 67(3), pages 369-392, 06.
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  8. Syed Abul Basher & Mohammed Mohsin, 2004. "PPP tests in cointegrated panels: evidence from Asian developing countries," Applied Economics Letters, Taylor & Francis Journals, vol. 11(3), pages 163-166.
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  10. Karlsson, Sune & Lothgren, Mickael, 2000. "On the power and interpretation of panel unit root tests," Economics Letters, Elsevier, vol. 66(3), pages 249-255, March.
  11. Park, Joon Y. & Phillips, Peter C.B., 1988. "Statistical Inference in Regressions with Integrated Processes: Part 1," Econometric Theory, Cambridge University Press, vol. 4(03), pages 468-497, December.
  12. Maddala, G S & Wu, Shaowen, 1999. " A Comparative Study of Unit Root Tests with Panel Data and a New Simple Test," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 61(0), pages 631-652, Special I.
  13. Kim, Hongkee & Oh, Keun-Yeob & Jeong, Chan-Woo, 2005. "Panel cointegration results on international capital mobility in Asian economies," Journal of International Money and Finance, Elsevier, vol. 24(1), pages 71-82, February.
  14. Jaroslava Hlouskova & Martin Wagner, 2006. "The Performance of Panel Unit Root and Stationarity Tests: Results from a Large Scale Simulation Study," Econometric Reviews, Taylor & Francis Journals, vol. 25(1), pages 85-116.
  15. Phillips, Peter C B & Ouliaris, S, 1990. "Asymptotic Properties of Residual Based Tests for Cointegration," Econometrica, Econometric Society, vol. 58(1), pages 165-193, January.
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Cited by:

  1. Jisun Kim & Tugrul Daim, 2014. "A new approach to measuring time-lags in technology licensing: study of U.S. academic research institutions," The Journal of Technology Transfer, Springer, vol. 39(5), pages 748-773, October.

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