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Unit roots: identification and testing in micro panels

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Author Info
Steve Bond () (Institute for Fiscal Studies and Nuffield College, Oxford)
Céline Nauges
Frank Windmeijer () (Institute for Fiscal Studies and University of Bristol)

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Abstract

We consider a number of unit root tests for micro panels where the number of individuals is typically large, but the number of time periods is often very small. As we discuss, the presence of a unit root is closely related to the identification of parameters of interest in this context. Calculations of asymptotic local power and Monte Carlo evidence indicate that two simple t-tests based on ordinary least squares estimators perform particularly well.

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Publisher Info
Paper provided by Centre for Microdata Methods and Practice, Institute for Fiscal Studies in its series CeMMAP working papers with number CWP07/05.

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Length: 40 pp.
Date of creation: Jul 2005
Date of revision:
Handle: RePEc:ifs:cemmap:07/05

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Related research
Keywords: Generalised Method of Moments; identification; unit root tests;

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Find related papers by JEL classification:
C12 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods: General - - - Hypothesis Testing
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. Arellano, Manuel & Bond, Stephen, 1991. "Some Tests of Specification for Panel Data: Monte Carlo Evidence and an Application to Employment Equations," Review of Economic Studies, Blackwell Publishing, vol. 58(2), pages 277-97, April. [Downloadable!] (restricted)
  2. Ahn, Seung C. & Schmidt, Peter, 1997. "Efficient estimation of dynamic panel data models: Alternative assumptions and simplified estimation," Journal of Econometrics, Elsevier, vol. 76(1-2), pages 309-321. [Downloadable!] (restricted)
  3. Hansen, Lars Peter, 1982. "Large Sample Properties of Generalized Method of Moments Estimators," Econometrica, Econometric Society, vol. 50(4), pages 1029-54, July. [Downloadable!] (restricted)
  4. Breitung, Jorg & Meyer, Wolfgang, 1994. "Testing for Unit Roots in Panel Data: Are Wages on Different Bargaining Levels Cointegrated?," Applied Economics, Taylor and Francis Journals, vol. 26(4), pages 353-61, April.
  5. Hugo Kruiniger & Elias Tzavalis, 2002. "Testing for unit roots in short dynamic panels with serially correlated and heteroskedastic disturbance terms," 10th International Conference on Panel Data, Berlin, July 5-6, 2002 B5-1, International Conferences on Panel Data. [Downloadable!]
    Other versions:
  6. Lancaster, Tony, 2002. "Orthogonal Parameters and Panel Data," Review of Economic Studies, Blackwell Publishing, vol. 69(3), pages 647-66, July.
  7. Arellano, Manuel & Bover, Olympia, 1995. "Another look at the instrumental variable estimation of error-components models," Journal of Econometrics, Elsevier, vol. 68(1), pages 29-51, July. [Downloadable!] (restricted)
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  8. Hugo Kruiniger, 2002. "Maximum Likelihood Estimation of Dynamic Linear Panel Data Models with Fixed Effects," Working Papers 458, Queen Mary, University of London, Department of Economics. [Downloadable!]
  9. Blundell, Richard & Bond, Stephen, 1998. "Initial conditions and moment restrictions in dynamic panel data models," Journal of Econometrics, Elsevier, vol. 87(1), pages 115-143, August. [Downloadable!] (restricted)
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  10. Harris, R. & Tzavalis, E., 1996. "Inference for Unit Roots in Dynamic Panels," Discussion Papers 96/04, University of Exeter, School of Business and Economics.
  11. Hsiao, Cheng & Hashem Pesaran, M. & Kamil Tahmiscioglu, A., 2002. "Maximum likelihood estimation of fixed effects dynamic panel data models covering short time periods," Journal of Econometrics, Elsevier, vol. 109(1), pages 107-150, July. [Downloadable!] (restricted)
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  12. Windmeijer, Frank, 2005. "A finite sample correction for the variance of linear efficient two-step GMM estimators," Journal of Econometrics, Elsevier, vol. 126(1), pages 25-51, May. [Downloadable!] (restricted)
  13. John Sutton, 1997. "Gibrat's Legacy," Journal of Economic Literature, American Economic Association, vol. 35(1), pages 40-59, March. [Downloadable!] (restricted)
  14. Ahn, Seung C. & Schmidt, Peter, 1995. "Efficient estimation of models for dynamic panel data," Journal of Econometrics, Elsevier, vol. 68(1), pages 5-27, July. [Downloadable!] (restricted)
  15. Harris, Richard D. F. & Tzavalis, Elias, 1999. "Inference for unit roots in dynamic panels where the time dimension is fixed," Journal of Econometrics, Elsevier, vol. 91(2), pages 201-226, August. [Downloadable!] (restricted)
  16. Hugo Kruiniger, 2002. "On the estimation of panel regression models with fixed effects," 10th International Conference on Panel Data, Berlin, July 5-6, 2002 C6-2, International Conferences on Panel Data. [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. Marco Corsino, 2008. "Product Innovation and Growth: The Case of Integrated Circuits," LEM Papers Series 2008/02, Laboratory of Economics and Management (LEM), Sant'Anna School of Advanced Studies, Pisa, Italy. [Downloadable!]
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  2. Enrique Benito, 2008. "Size, growth and bank dynamics," Banco de España Working Papers 0801, Banco de España. [Downloadable!]
  3. Barros, Pedro Pita & Clougherty, Joseph A & Seldeslachts, Jo, 2007. "Remedy for Now but Prohibit for Tomorrow: The Deterrence Effects of Merger Policy Tools," CEPR Discussion Papers 6437, C.E.P.R. Discussion Papers. [Downloadable!] (restricted)
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  4. Marcus Tamm & Harald Tauchmann & Jürgen Wasem & Stefan Greß, 2007. "Elasticities of market shares and social health insurance choice in germany: a dynamic panel data approach," Health Economics, John Wiley & Sons, Ltd., vol. 16(3), pages 243-256. [Downloadable!]
  5. Giannetti, C., 2008. "Unit Roots and the Dynamics of Market Shares: An Analysis Using Italian Banking Micro-Panel," Discussion Paper 2008-44, Tilburg University, Center for Economic Research. [Downloadable!]
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