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Testing for unit roots in short panels allowing for a structural break

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  • Karavias, Yiannis
  • Tzavalis, Elias

Abstract

Panel data unit root tests which allow for a common structural break in the individual effects or linear trends of the AR(1) panel data model are suggested. These allow the date of the break to be unknown. The tests assume that the time-dimension of the panel (T) is fixed (finite) while the cross-section (N) is large. Under the null hypothesis of unit roots, they are similar to the initial conditions of the model and its individual effects. Extensions of the tests to the AR(2) model are provided. These highlight the difficulties in extending the tests to higher order serial correlation of the error terms. Monte Carlo experiments indicate that the small sample performance of the tests is very satisfactory. Application of the tests to the trade openness variable of the non-oil countries indicates that evidence of persistence of this variable can be attributed to trade liberalization policies adopted by many developing countries since the early nineties.

Suggested Citation

  • Karavias, Yiannis & Tzavalis, Elias, 2014. "Testing for unit roots in short panels allowing for a structural break," Computational Statistics & Data Analysis, Elsevier, vol. 76(C), pages 391-407.
  • Handle: RePEc:eee:csdana:v:76:y:2014:i:c:p:391-407
    DOI: 10.1016/j.csda.2012.10.014
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    References listed on IDEAS

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    Citations

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    Cited by:

    1. Karavias, Yiannis & Tzavalis, Elias, 2012. "Generalized �Fixed-T Panel Unit Root Tests Allowing for Structural Breaks," MPRA Paper 43128, University Library of Munich, Germany.
    2. Yiannis Karavias & Elias Tzavalis, "undated". "The power performance of fixed-T panel unit root tests allowing for structural breaks," Discussion Papers 13/01, University of Nottingham, Granger Centre for Time Series Econometrics.
    3. Samargandi, Nahla & Fidrmuc, Jan & Ghosh, Sugata, 2015. "Is the Relationship Between Financial Development and Economic Growth Monotonic? Evidence from a Sample of Middle-Income Countries," World Development, Elsevier, vol. 68(C), pages 66-81.
    4. Yiannis Karavias & Elias Tzavalis, "undated". "Testing for unit roots in panels with structural changes, spatial and temporal dependence when the time dimension is finite," Discussion Papers 14/03, University of Nottingham, Granger Centre for Time Series Econometrics.
    5. Yiannis Karavias & Elias Tzavalis, "undated". "The local power of fixed-T panel unit root tests allowing for serially correlated errors," Discussion Papers 12/01, University of Nottingham, Granger Centre for Time Series Econometrics.
    6. repec:spr:stpapr:v:58:y:2017:i:3:d:10.1007_s00362-015-0722-y is not listed on IDEAS
    7. Yiannis Karavias & Elias Tzavalis, 2016. "Local Power of Fixed-T Panel Unit Root Tests With Serially Correlated Errors and Incidental Trends," Journal of Time Series Analysis, Wiley Blackwell, vol. 37(2), pages 222-239, March.
    8. Karanasos, M. & Koutroumpis, P. & Karavias, Y. & Kartsaklas, A. & Arakelian, V., 2016. "Inflation convergence in the EMU," Journal of Empirical Finance, Elsevier, vol. 39(PB), pages 241-253.
    9. Yiannis Karavias & Elias Tzavalis, "undated". "Generalized fixed-T panel unit root tests allowing for structural breaks," Discussion Papers 12/02, University of Nottingham, Granger Centre for Time Series Econometrics.

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