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Efficient tests for autoregressive unit roots in panel data

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  • David Bowman

Abstract

In this paper the class of admissable tests for unit roots in panel data sets of autoregressive, Gaussian time series will be partially characterized. Using this characterization, several recently suggested tests are shown to be inadmissable. Since the sufficient statistic for this testing problem is multidimensional, there is no uniformly most powerful test; however, in light of the inadmissability result, a new test is proposed that appears to do well relative to existing tests. The test is parameterized in a way that allows the choice of different directional deviations from the null hypothesis over which power is to be maximized, giving added flexibility to researchers.

Suggested Citation

  • David Bowman, 1999. "Efficient tests for autoregressive unit roots in panel data," International Finance Discussion Papers 646, Board of Governors of the Federal Reserve System (U.S.).
  • Handle: RePEc:fip:fedgif:646
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    Citations

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    Cited by:

    1. Im, Kyung So & Pesaran, M. Hashem & Shin, Yongcheol, 2003. "Testing for unit roots in heterogeneous panels," Journal of Econometrics, Elsevier, vol. 115(1), pages 53-74, July.
    2. Papell, David H., 2002. "The great appreciation, the great depreciation, and the purchasing power parity hypothesis," Journal of International Economics, Elsevier, vol. 57(1), pages 51-82, June.
    3. M. Hashem Pesaran, 2007. "A simple panel unit root test in the presence of cross-section dependence," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 22(2), pages 265-312.
    4. Chen, Natalie, 2004. "The behaviour of relative prices in the European Union: A sectoral analysis," European Economic Review, Elsevier, vol. 48(6), pages 1257-1286, December.
    5. Papell, David H., 2006. "The Panel Purchasing Power Parity Puzzle," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 38(2), pages 447-467, March.
    6. Claude Lopez, 2009. "A Panel Unit Root Test with Good Power in Small Samples," Econometric Reviews, Taylor & Francis Journals, vol. 28(4), pages 295-313.
    7. Alba, Joseph D. & Park, Donghyun, 2003. "Purchasing Power Parity in Developing Countries: Multi-Period Evidence Under the Current Float," World Development, Elsevier, vol. 31(12), pages 2049-2060, December.
    8. Chaudhuri Kausik & Sheen Jeffrey R, 2007. "To Pool or to Aggregate? Tests with a Dynamic Panel Macroeconometric Model of Australian State Labor Markets," The B.E. Journal of Macroeconomics, De Gruyter, vol. 7(1), pages 1-37, January.

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    Keywords

    Econometric models ; Time-series analysis;

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