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Mussa Redux and Conditional PPP

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  • Paul R. Bergin
  • Reuven Glick
  • Jyh-Lin Wu

Abstract

Long half-lives of real exchange rates are often used as evidence against monetary sticky price models. In this study we show how exchange rate regimes alter the long-run dynamics and half-life of the real exchange rate, and we recast the classic defense of such models by Mussa (1986) from an argument based on short-run volatility to one based on long-run dynamics. The first key result is that the extremely persistent real exchange rate found commonly in post Bretton Woods data does not apply to the preceding fixed exchange rate period in our sample, where the half-live was perhaps half as large. This result suggests a reinterpretation of Mussa's original finding, indicating that up to two thirds of the rise in variance of the real exchange rate in the recent period is actually due to the rise in persistence of the response to shocks, rather than due to a rise in the variance of shocks themselves. The second key result explains the rise in persistence over time by identifying underlying shocks using a panel VECM model. Shocks to the nominal exchange rate induce more persistent real exchange rate responses compared to price shocks, and these shocks became more prevalent under a flexible exchange rate regime.

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  • Paul R. Bergin & Reuven Glick & Jyh-Lin Wu, 2012. "Mussa Redux and Conditional PPP," NBER Working Papers 18331, National Bureau of Economic Research, Inc.
  • Handle: RePEc:nbr:nberwo:18331
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    Cited by:

    1. Bergin, Paul R. & Glick, Reuven & Wu, Jyh-Lin, 2014. "Mussa redux and conditional PPP," Journal of Monetary Economics, Elsevier, vol. 68(C), pages 101-114.
    2. Bergin, Paul R. & Glick, Reuven & Wu, Jyh-Lin, 2017. "“Conditional PPP” and real exchange rate convergence in the euro area," Journal of International Money and Finance, Elsevier, vol. 73(PA), pages 78-92.
    3. Fidora, Michael & Giordano, Claire & Schmitz, Martin, 2017. "Real exchange rate misalignments in the euro area," Working Paper Series 2108, European Central Bank.
    4. Zhang, Zhibai, 2015. "Convergence of absolute purchasing power parity," MPRA Paper 64486, University Library of Munich, Germany.
    5. Daniel M. Bernhofen & Markus Eberhardt & Jianan Li & Stephen Morgan, 2015. "Assessing Market (Dis)Integration in Early Modern China and Europe," CESifo Working Paper Series 5580, CESifo Group Munich.
    6. Adrian R. Bell & Chris Brooks & Tony K. Moore, 2017. "Did Purchasing Power Parity Hold in Medieval Europe?," Manchester School, University of Manchester, vol. 85(6), pages 682-709, December.

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    JEL classification:

    • F15 - International Economics - - Trade - - - Economic Integration
    • F31 - International Economics - - International Finance - - - Foreign Exchange

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