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Uncertain Effects Of Shocks Vs. Uncertain Unit Root: An Alternative View Of U.S. Real Gdp

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  • HUANG, YU-LIEH
  • HUANG, CHAO-HSI

Abstract

Instead of exploring the uncertainty about the existence of a unit root in the long-span U.S. real GDP series as in previous studies, e.g., Rudebusch (1993), in this study we investigate the uncertainty about the state (permanence vs. transitoriness) of the output shock period by period by using the “innovation regime-switching” (IRS) model. In this model the effect of a shock may be permanent or transitory in different time periods. By applying the IRS model to the 1870-2008 annual U.S. real GDP data, we find that the output shocks in the periods of the 1893 depression, the 1907 financial panic, the two World Wars and the Great Depression are likely to have had a large but transitory effect, whereas the output shocks in the remaining periods are likely to have had a permanent effect. This result suggests that the long span real GDP is neither a unit-root series nor a trend-stationary series.

Suggested Citation

  • Huang, Yu-Lieh & Huang, Chao-Hsi, 2015. "Uncertain Effects Of Shocks Vs. Uncertain Unit Root: An Alternative View Of U.S. Real Gdp," Hitotsubashi Journal of Economics, Hitotsubashi University, vol. 56(1), pages 117-134, June.
    • Handle: RePEc:hit:hitjec:v:56:y:2015:i:1:p:117-134
    DOI: 10.15057/27191
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    References listed on IDEAS

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    More about this item

    Keywords

    Innovation regime-switching; permanent innovation; trend-stationarity; uncertain unit root;
    All these keywords.

    JEL classification:

    • C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes
    • C51 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Model Construction and Estimation

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