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PESCADF: Stata module to perform Pesaran's CADF panel unit root test in presence of cross section dependence

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Author Info

  • Piotr Lewandowski

    ()
    (Warsaw School of Economics, Institute for Structural Research)

Abstract

pescadf runs the t-test for unit roots in heterogenous panels with cross-section dependence, proposed by Pesaran (2003). Parallel to Im, Pesaran and Shin (IPS, 2003) test, it is based on the mean of individual DF (or ADF) t-statistics of each unit in the panel. Null hypothesis assumes that all series are non-stationary. To eliminate the cross dependence, the standard DF (or ADF) regressions are augmented with the cross section averages of lagged levels and first-differences of the individual series (CADF statistics). Considered is also a truncated version of the CADF statistics, which has finite first and second order moments. The exact critical values of the t-bar statistic are given by Pesaran (2003). The critical values and summary statistics of the individual t are also given in the paper, so the Z[t-bar] statistic parallel to IPS (2003) Z[t-bar] (4.10) is distributed standard normal under the null hypothesis of nonstationarity.

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File URL: http://fmwww.bc.edu/repec/bocode/p/pescadf.ado
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File URL: http://fmwww.bc.edu/repec/bocode/p/pescadf.hlp
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Bibliographic Info

Software component provided by Boston College Department of Economics in its series Statistical Software Components with number S456732.

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Programming language: Stata
Requires: Stata version 8.2
Date of creation: 12 Jun 2006
Date of revision: 08 Oct 2007
Handle: RePEc:boc:bocode:s456732

Note: This module should be installed from within Stata by typing "ssc install pescadf". Windows users should not attempt to download these files with a web browser.
Contact details of provider:
Postal: Boston College, 140 Commonwealth Avenue, Chestnut Hill MA 02467 USA
Phone: 617-552-3670
Fax: +1-617-552-2308
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Web page: http://fmwww.bc.edu/EC/
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Related research

Keywords: panel data; stationarity; unit roots; panel unit root;

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