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Costs of misspecification in break-model unit-root tests

Author

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  • Florin G. Maican
  • Richard J. Sweeney

Abstract

This article examines power issues for the ADF and four break models (Perron, 1989; Zivot and Andrews, 1992) when the DGP corresponds to one of the break models. Choosing to test an incorrect break model can, but need not, greatly reduce the probability of rejecting the null. Break points that are relatively early in the sample period have substantial effects of increasing power. For modest shifts in time trends, simply including a time trend without shift in the model preserves power, but not for large time-trend shifts.

Suggested Citation

  • Florin G. Maican & Richard J. Sweeney, 2014. "Costs of misspecification in break-model unit-root tests," Applied Economics, Taylor & Francis Journals, vol. 46(1), pages 111-118, January.
    • Handle: RePEc:taf:applec:v:46:y:2014:i:1:p:111-118
    DOI: 10.1080/00036846.2013.831171
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    2. Maican, Florin G. & Sweeney, Richard J., 2013. "Rejection Probabilities for a Battery of Unit-Root Tests," Working Papers in Economics 568, University of Gothenburg, Department of Economics.

    More about this item

    JEL classification:

    • C15 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Statistical Simulation Methods: General
    • C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes
    • C32 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes; State Space Models
    • C33 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Models with Panel Data; Spatio-temporal Models
    • E31 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Price Level; Inflation; Deflation
    • F31 - International Economics - - International Finance - - - Foreign Exchange

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