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Quantile unit root test and PPP: evidence from 23 OECD countries

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  • Mohsen Bahmani-Oskooee
  • Omid Ranjbar

Abstract

Application of six different univariate unit root tests to real effective exchange rates of 23 OECD countries supports their stationarity or Purchasing Power Parity theory (PPP) only in five countries, a result consistent with previous research that is known as PPP puzzle. However, descriptive statistics of each effective rate reveals a clear sign of non-normal distribution. To account for this, we use quantile unit root test which allows impact of different shocks to be realized at different quantiles. When we applied this new test to the same rates, number of countries in which PPP is supported increased to 16. Apparently, incorporating effects of shocks improves testing efficiency and provides more support for the PPP and reduces the severity of the puzzle.

Suggested Citation

  • Mohsen Bahmani-Oskooee & Omid Ranjbar, 2016. "Quantile unit root test and PPP: evidence from 23 OECD countries," Applied Economics, Taylor & Francis Journals, vol. 48(31), pages 2899-2911, July.
    • Handle: RePEc:taf:applec:v:48:y:2016:i:31:p:2899-2911
    DOI: 10.1080/00036846.2015.1130794
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    3. Nartea, Gilbert V. & Valera, Harold Glenn A. & Valera, Maria Luisa G., 2021. "Mean reversion in Asia-Pacific stock prices: New evidence from quantile unit root tests," International Review of Economics & Finance, Elsevier, vol. 73(C), pages 214-230.
    4. Mohsen Bahmani-Oskooee & Tsangyao Chang & Tsung-hsien Chen & Han-wen Tzeng, 2016. "Revisiting the efficient market hypothesis in transition countries using quantile unit root test," Economics Bulletin, AccessEcon, vol. 36(4), pages 2171-2182.
    5. BAHMANI-OSKOOEE, Mohsen & Wu, Tsung-Pao, 2017. "Purchasing Power Parity in the 34 OECD Countries: Evidence from Quantile-Based Unit Root Tests with both Smooth and Sharp Breaks," MPRA Paper 81820, University Library of Munich, Germany, revised 07 Feb 2017.
    6. Cai, Yifei & Menegaki, Angeliki N., 2019. "Fourier quantile unit root test for the integrational properties of clean energy consumption in emerging economies," Energy Economics, Elsevier, vol. 78(C), pages 324-334.
    7. David De Villiers & Andrew Phiri, 2022. "Towards resolving the purchasing power parity (PPP) ‘Puzzle’ in newly industrialized countries (NIC’s)," The Journal of International Trade & Economic Development, Taylor & Francis Journals, vol. 31(2), pages 161-180, February.
    8. Nusair, Salah A. & Olson, Dennis, 2019. "The effects of oil price shocks on Asian exchange rates: Evidence from quantile regression analysis," Energy Economics, Elsevier, vol. 78(C), pages 44-63.
    9. Lee, Yi-Lung & Ranjbar, Omid & Jahangard, Fateme & Chang, Tsangyao, 2020. "Analyzing slowdown and meltdowns in the African countries: New evidence using Fourier quantile unit root test," International Review of Economics & Finance, Elsevier, vol. 65(C), pages 187-198.
    10. Panagiotis Palaios & Evangelia Papapetrou, 2019. "Asymmetric dynamics in the social contributions and social benefits nexus in Greece," Economic Change and Restructuring, Springer, vol. 52(4), pages 327-349, November.
    11. Hendriks, Johannes Jurgens & Bonga-Bonga, Lumengo, 2022. "Testing for the purchasing power parity (PPP) hypothesis between South Africa and its main trading partners: application of the quantile approach," MPRA Paper 112915, University Library of Munich, Germany.

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