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On The Panel Unit Root Tests Using Nonlinear Instrumental Variables

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Author Info
Im, K.S.
Pesaran, M.H.

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Abstract

This paper re-examines the panel unit root tests proposed by Chang (2002). She establishes asymptotic independence of the t-statistics when integrable functions of lagged dependent variable are used as instruments even if the original series are cross sectionally dependent. She claims that her non-linear instrumental variable (NIV) panel unit root test is valid under general error cross correlations for any N (the cross section dimension) as T (the time dimension of the panel) tends to infinity. These results are largely due to her particular choice of the error correlation matrix which results in weak cross section dependence. Also, the asymptotic independence property of the t- statistics disappears when Chang's modified instruments are used. Using a common factor model with a sizeable degree of cross section correlations, we show that Chang's NIV panel unit root test suffers from gross size distortions, even when N is small relative to T.

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Paper provided by Faculty of Economics, University of Cambridge in its series Cambridge Working Papers in Economics with number 0347.

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Length: 12
Date of creation: Oct 2003
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Handle: RePEc:cam:camdae:0347

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Related research
Keywords: Non-linear Instrumental Variable (NIV) panel unit root tests; cross-section dependence; finite sample properties;

Find related papers by JEL classification:
C12 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods: General - - - Hypothesis Testing
C15 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods: General - - - Statistical Simulation Methods
C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions
C23 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Models with Panel Data

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References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
  1. Peter C.B. Phillips & Joon Y. Park, 1998. "Asymptotics for Nonlinear Transformations of Integrated Time Series," Cowles Foundation Discussion Papers 1182, Cowles Foundation, Yale University. [Downloadable!]
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  2. Yoosoon Chang & Joon Y. Park & Peter C.B. Phillips, 1999. "Nonlinear Econometric Models with Cointegrated and Deterministically Trending Regressors," Cowles Foundation Discussion Papers 1245, Cowles Foundation, Yale University. [Downloadable!]
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  3. 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. [Downloadable!] (restricted)
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  4. MOON, Hyungsik Roger & PERRON, Benoit., 2002. "Testing for a Unit Root in Panels with Dynamic Factors," Cahiers de recherche 2002-18, Universite de Montreal, Departement de sciences economiques. [Downloadable!]
    Other versions:
  5. Yoosoon Chang, 2000. "Nonlinear IV Unit Root Tests in Panels with Cross-Sectional Dependency," CIRJE F-Series CIRJE-F-85, CIRJE, Faculty of Economics, University of Tokyo. [Downloadable!]
    Other versions:
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Cited by:
(explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.)

  1. Stefano Fachin, 2005. "Long-Run Trends in Internal Migrations in Italy: a Study in Panel Cointegration with Dependent Units," Econometrics 0507002, EconWPA. [Downloadable!]
    Other versions:
  2. Neziri, Hekuran, 2008. "Can Credit Default Swaps Predict Financial Crises: An Empirical Test on Emerging Markets," MPRA Paper 13096, University Library of Munich, Germany. [Downloadable!]
  3. Martin Wagner & Georg Müller-Fürstenberger, 2004. "The Carbon Kuznets Curve: A Cloudy Picture Emitted by Bad Econometrics?," Diskussionsschriften dp0418, Universitaet Bern, Departement Volkswirtschaft. [Downloadable!]
    Other versions:
  4. Pesaran, M.H., 2003. "A Simple Panel Unit Root Test in the Presence of Cross Section Dependence," Cambridge Working Papers in Economics 0346, Faculty of Economics, University of Cambridge. [Downloadable!]
    Other versions:
  5. Martin Wagner, 2008. "On PPP, unit roots and panels," Empirical Economics, Springer, vol. 35(2), pages 229-249, September. [Downloadable!] (restricted)
    Other versions:
  6. Hyungsik Roger Moon & Benoit Perron, 2005. "An Empirical Analysis of Nonstationarity in Panels of Exchange Rates and Interest Rates with Factors," IEPR Working Papers 05.35, Institute of Economic Policy Research (IEPR). [Downloadable!]
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