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Efficient tests for autoregressive unit roots in panel data

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Author Info
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.

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Paper provided by Board of Governors of the Federal Reserve System (U.S.) in its series International Finance Discussion Papers with number 646.

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Date of creation: 1999
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Handle: RePEc:fip:fedgif:646

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Related research
Keywords: Econometric models ; Time-series analysis;

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  1. Claude Lopez, 2003. "An Improved Panel Unit Root Test Using GLS-Detrending," Econometrics 0310006, EconWPA, revised 24 Oct 2003. [Downloadable!]
    Other versions:
  2. Claude Lopez, 2004. "Evidence of Purchasing Power Parity for the Floating Regime Period," University of Cincinnati, Economics Working Papers Series 2004-01, University of Cincinnati, Department of Economics, revised Mar 2006. [Downloadable!]
    Other versions:
  3. Kausik Chaudhuri & Jeffrey R. Sheen, 2007. "To Pool or to Aggregate? Tests with a Dynamic Panel Macroeconometric Model of Australian State Labor Markets," The B.E. Journal of Macroeconomics, Berkeley Electronic Press, vol. 7(1). [Downloadable!]
  4. 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. [Downloadable!]
    Other versions:
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