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Empirical test for purchasing power parity using a time-varying parameter model: Japan and Korea cases

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  • Hyung-Gun Kim
  • Sang Young Jei

Abstract

This study examines the validity of the Purchasing Power Parity (PPP) hypothesis for Japan and Korea by using a smooth time-varying cointegrating regression model. When we use the usual approaches, including unit root and cointegration tests, we fail to find the existence of the PPP for Japan and Korea. However, we find there is a time-varying cointegrating relationship between the logarithm of nominal exchange rates and the logarithm of the Producer Price Indices (PPI) ratio for Japan and Korea. This relationship does support the PPP theory. Moreover, we also find that the exact PPP theory holds for some periods in Japan and Korea.

Suggested Citation

  • Hyung-Gun Kim & Sang Young Jei, 2013. "Empirical test for purchasing power parity using a time-varying parameter model: Japan and Korea cases," Applied Economics Letters, Taylor & Francis Journals, vol. 20(6), pages 525-529, April.
    • Handle: RePEc:taf:apeclt:v:20:y:2013:i:6:p:525-529
    DOI: 10.1080/13504851.2012.689109
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    Cited by:

    1. Hyein Shim & Hyeyoen Kim & Sunghyun Kim & Doojin Ryu, 2016. "Testing the relative purchasing power parity hypothesis: the case of Korea," Applied Economics, Taylor & Francis Journals, vol. 48(25), pages 2383-2395, May.
    2. Yoon, Jong Cheol & Min, Dai Hong & Jei, Sang Young, 2020. "Purchasing power parity vs. uncovered interest rate parity for NAFTA countries: The value of incorporating time-varying parameter model," Economic Modelling, Elsevier, vol. 90(C), pages 494-500.
    3. Jingfei Wu & Mohsen Bahmani-Oskooee & Tsangyao Chang, 2018. "Revisiting purchasing power parity in G6 countries: an application of smooth time-varying cointegration approach," Empirica, Springer;Austrian Institute for Economic Research;Austrian Economic Association, vol. 45(1), pages 187-196, February.
    4. Park, Soo Kyung & Park, Choel Beom, 2015. "Time-varying Cointegration Models and Exchange Rate Predictability in Korea," KDI Journal of Economic Policy, Korea Development Institute (KDI), vol. 37(4), pages 1-20.
    5. Yoon, Jong Cheol & Min, Dai Hong & Jei, Sang Young, 2019. "Empirical test of purchasing power parity using a time-varying cointegration model for China and the UK," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 521(C), pages 41-47.

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