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Asymmetric Exchange Rates and Unofficial Exchange Rate Interventions: The Case of South Korea

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  • Ki Young Park

Abstract

Applying Milton Friedman's ‘plucking’ model of output fluctuations, we investigate the behavior of the Korean won/dollar exchange rate using a state-space model with Markov switching, which incorporates both symmetric and asymmetric shocks. We find that the Korean won/US dollar exchange rate rarely falls below its trend, but is plucked upward from time to time by transitory shocks. This asymmetry suggests that the monetary authority unofficially intervenes in the foreign exchange market to support its own target level from below. Further evidence from changes in reserve assets indirectly supports our finding.

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  • Ki Young Park, 2010. "Asymmetric Exchange Rates and Unofficial Exchange Rate Interventions: The Case of South Korea," International Economic Journal, Taylor & Francis Journals, vol. 25(3), pages 359-371, July.
    • Handle: RePEc:taf:intecj:v:25:y:2011:i:3:p:359-371
    DOI: 10.1080/10168737.2011.607259
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    1. Kim, Chang-Jin & Nelson, Charles R, 1999. "Friedman's Plucking Model of Business Fluctuations: Tests and Estimates of Permanent and Transitory Components," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 31(3), pages 317-334, August.
    2. Beaudry, Paul & Koop, Gary, 1993. "Do recessions permanently change output?," Journal of Monetary Economics, Elsevier, vol. 31(2), pages 149-163, April.
    3. Hamilton, James D, 1989. "A New Approach to the Economic Analysis of Nonstationary Time Series and the Business Cycle," Econometrica, Econometric Society, vol. 57(2), pages 357-384, March.
    4. Lam, Pok-sang, 1990. "The Hamilton model with a general autoregressive component: estimation and comparison with other models of economic time series : Estimation and comparison with other models of economic time series," Journal of Monetary Economics, Elsevier, vol. 26(3), pages 409-432, December.
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    Cited by:

    1. Park, Ki Young & Kim, Soohyon, 2019. "Detecting currency manipulation: An application of a state-space model with Markov switching," Japan and the World Economy, Elsevier, vol. 49(C), pages 50-60.

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