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Bayesian analysis of nonlinear exchange rate dynamics and the purchasing power parity persistence puzzle


  • Lo, Ming Chien
  • Morley, James


We investigate the persistence of real exchange rates using Bayesian methods. First, an algorithm for Bayesian estimation of nonlinear threshold models is developed. Unlike standard grid-based estimation, the Bayesian approach fully captures joint parameter uncertainty and uncertainty about complicated functions of the parameters, such as the half-life measure of persistence based on generalized impulse response functions. Second, model comparison is conducted via marginal likelihoods, which reflect the relative abilities of models to predict the data given prior beliefs about model parameters. This comparison is conducted for a range of linear and nonlinear models and provides a direct evaluation of the importance of nonlinear dynamics in modeling exchange rates. The marginal likelihoods also imply weights for a model-averaged measure of persistence. The empirical results for real exchange rate data from the G7 countries suggest general support for nonlinearity, with the strength of the evidence depending on which country pair is being considered. However, the model-averaged estimates of half-lives are almost always as small or smaller than for the linear models alone, suggesting that the purchasing power parity persistence puzzle is less of a puzzle than previously thought.

Suggested Citation

  • Lo, Ming Chien & Morley, James, 2015. "Bayesian analysis of nonlinear exchange rate dynamics and the purchasing power parity persistence puzzle," Journal of International Money and Finance, Elsevier, vol. 51(C), pages 285-302.
  • Handle: RePEc:eee:jimfin:v:51:y:2015:i:c:p:285-302 DOI: 10.1016/j.jimonfin.2014.12.003

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    References listed on IDEAS

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    Cited by:

    1. Hernán Rincón-Castro & Norberto Rodríguez-Niño, 2016. "Nonlinear Pass-Through of Exchange Rate Shocks on Inflation: A Bayesian Smooth Transition VAR Approach," Borradores de Economia 930, Banco de la Republica de Colombia.
    2. Fazzari Steven M. & Morley James & Panovska Irina, 2015. "State-dependent effects of fiscal policy," Studies in Nonlinear Dynamics & Econometrics, De Gruyter, vol. 19(3), pages 285-315, June.
    3. Donayre, Luiggi & Panovska, Irina, 2016. "State-dependent exchange rate pass-through behavior," Journal of International Money and Finance, Elsevier, vol. 64(C), pages 170-195.
    4. Fazzari Steven M. & Morley James & Panovska Irina, 2015. "State-dependent effects of fiscal policy," Studies in Nonlinear Dynamics & Econometrics, De Gruyter, vol. 19(3), pages 285-315, June.
    5. Meng, Xiangcai & Huang, Chia-Hsing, 2016. "Nonlinear models for the sources of real effective exchange rate fluctuations: Evidence from the Republic of Korea," Japan and the World Economy, Elsevier, vol. 40(C), pages 21-30.

    More about this item


    Bayesian analysis; Real exchange rate dynamics; Purchasing power parity; Nonlinear threshold models; Bayesian model averaging; Half lives;

    JEL classification:

    • C11 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Bayesian Analysis: 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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