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Unit Root Testing in Presence of a Double Threshold Process

Author

Listed:
  • Francesco Giordano

    (University of Salerno)

  • Marcella Niglio

    (University of Salerno)

  • Cosimo Damiano Vitale

    (University of Salerno)

Abstract

In this paper we propose a double threshold process that generalizes the threshold autoregressive one widely known in the literature. It is characterized by a structure with two thresholds: the first regulates the switching between two autoregressive regimes; the second threshold regulates the switching between the two regimes of the stationary innovations. A testing procedure based on a Wald statistic has been given to evaluate the presence of unit roots in the process against stationarity. The asymptotic distribution of the statistic has been derived and the size and the power of the test have been evaluated through a Monte Carlo study where the proposed test is compared to two competing unit root testing procedures. The results clearly highlight the advantage obtained from the proposed test as the asymmetry of the generating process increases.

Suggested Citation

  • Francesco Giordano & Marcella Niglio & Cosimo Damiano Vitale, 2017. "Unit Root Testing in Presence of a Double Threshold Process," Methodology and Computing in Applied Probability, Springer, vol. 19(2), pages 539-556, June.
    • Handle: RePEc:spr:metcap:v:19:y:2017:i:2:d:10.1007_s11009-016-9499-2
    DOI: 10.1007/s11009-016-9499-2
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    References listed on IDEAS

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    1. Frederic Bec & Melika Ben Salem & Marine Carrasco, 2004. "Tests for Unit-Root versus Threshold Specification With an Application to the Purchasing Power Parity Relationship," Journal of Business & Economic Statistics, American Statistical Association, vol. 22, pages 382-395, October.
    2. Seo, Myung Hwan, 2008. "Unit Root Test In A Threshold Autoregression: Asymptotic Theory And Residual-Based Block Bootstrap," Econometric Theory, Cambridge University Press, vol. 24(6), pages 1699-1716, December.
    3. Mehmet Caner & Bruce E. Hansen, 2001. "Threshold Autoregression with a Unit Root," Econometrica, Econometric Society, vol. 69(6), pages 1555-1596, November.
    4. Pippenger, Michael K & Goering, Gregory E, 1993. "A Note on the Empirical Power of Unit Root Tests under Threshold Processes," Oxford Bulletin of Economics and Statistics, Department of Economics, University of Oxford, vol. 55(4), pages 473-481, November.
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    6. Gao, Jiti & Tjøstheim, Dag & Yin, Jiying, 2013. "Estimation in threshold autoregressive models with a stationary and a unit root regime," Journal of Econometrics, Elsevier, vol. 172(1), pages 1-13.
    7. Daiki Maki, 2009. "Tests for a Unit Root Using Three-Regime TAR Models: Power Comparison and Some Applications," Econometric Reviews, Taylor & Francis Journals, vol. 28(4), pages 335-363.
    8. Efstathios Paparoditis & Dimitris N. Politis, 2003. "Residual-Based Block Bootstrap for Unit Root Testing," Econometrica, Econometric Society, vol. 71(3), pages 813-855, May.
    9. Jean-Yves Pitarakis, 2008. "Comment on: Threshold Autoregressions With a Unit Root," Econometrica, Econometric Society, vol. 76(5), pages 1207-1217, September.
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    Cited by:

    1. Kung-Sik Chan & Simone Giannerini & Greta Goracci & Howell Tong, 2020. "Testing for threshold regulation in presence of measurement error with an application to the PPP hypothesis," Papers 2002.09968, arXiv.org, revised Nov 2021.

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