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Cointegration Tests of PPP: Do they also Exhibit Erratic Behaviour?

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  • Guglielmo Maria Caporale
  • Christoph Hanck

Abstract

We analyse whether tests of PPP exhibit erratic behaviour (as previously reported by Caporale et al., 2003) even when (possibly unwarranted) homogeneity and proportionality restrictions are not imposed, and trivariate cointegration (stage-three) tests between the nominal exchange rate, domestic and foreign price levels are carried out (instead of stationarity tests on the real exchange rate, as in stage-two tests). We examine the US dollar real exchange rate vis-à-vis 21 other currencies over a period of more than a century, and find that stage-three tests produce similar results to those for stage-two tests, namely the former also behave erratically. This confirms that neither of these traditional approaches to testing for PPP can solve the issue of PPP.

Suggested Citation

  • Guglielmo Maria Caporale & Christoph Hanck, 2006. "Cointegration Tests of PPP: Do they also Exhibit Erratic Behaviour?," CESifo Working Paper Series 1811, CESifo.
    • Handle: RePEc:ces:ceswps:_1811
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    Cited by:

    1. Guglielmo Maria Caporale & Christoph Hanck, 2010. "Are PPP tests erratically behaved? Some panel evidence," International Review of Applied Economics, Taylor & Francis Journals, vol. 24(2), pages 203-221.
    2. Sandeep Mazumder & Ryan Pahl, 2013. "What if the UK had Joined the Euro in 1999?," Open Economies Review, Springer, vol. 24(3), pages 447-470, July.
    3. Georgios Loukopoulos & Dimitrios Antonopoulos, 2015. "Purchasing Power Parity: A Unit Root, Cointegration and VAR Analysis in Emerging and Advanced Countries," Business and Economic Research, Macrothink Institute, vol. 5(1), pages 262-279, June.

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    More about this item

    Keywords

    Purchasing Power Parity (PPP); real exchange rate; cointegration; stationarity; parameter instability;
    All these keywords.

    JEL classification:

    • C12 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Hypothesis Testing: General
    • C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes
    • F31 - International Economics - - International Finance - - - Foreign Exchange

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