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Searching for nonlinearities in real exchange rates

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  • Yamin Ahmad
  • Stuart Glosser

Abstract

A recent innovation in modelling exchange rates has been the use of nonlinear techniques such as threshold autoregressive models and its smooth transition variants. This article investigates the Smooth Transition Autoregressive (STAR) modelling strategy in an application to real exchange rates. The key findings are as follows. First, using the methodology advocated by Terasvirta (1994), we find evidence of nonlinear dynamics for several of the spot dollar real exchange rates using monthly data on five of the G7 countries. However, once estimated, we find that the STAR specification is appropriate for only one of the three exchange rate series indicated to be an Exponential Smooth Transition Autoregressive (ESTAR) process. Moreover, using simulations, we show that the underlying methodology used to detect nonlinearities in the data exhibit substantial size biases, which we attribute to influential observations. We find, upon investigating alternative nonlinear specifications, that the open-loop Threshold Autoregressive (TAR) process is a more appropriate specification than the ESTAR process for the dollar-sterling and dollar-lira real exchange rates.

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File URL: http://www.tandfonline.com/doi/abs/10.1080/00036840902817797
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Bibliographic Info

Article provided by Taylor & Francis Journals in its journal Applied Economics.

Volume (Year): 43 (2011)
Issue (Month): 15 ()
Pages: 1829-1845

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Handle: RePEc:taf:applec:v:43:y:2011:i:15:p:1829-1845

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  1. Kenneth Rogoff, 1996. "The Purchasing Power Parity Puzzle," Journal of Economic Literature, American Economic Association, vol. 34(2), pages 647-668, June.
  2. Kilian, Lutz & Taylor, Mark P., 2003. "Why is it so difficult to beat the random walk forecast of exchange rates?," Journal of International Economics, Elsevier, vol. 60(1), pages 85-107, May.
  3. Meese, R. & Rogoff, K., 1988. "Was It Real? The Exchange Rate-Interest Differential Ralation Over The Modern Floating-Rate Period," Working papers 368, Wisconsin Madison - Social Systems.
  4. Peel, David & Sarno, Lucio & Taylor, Mark P, 2001. "Nonlinear Mean-Reversion in Real Exchange Rates: Towards a Solution to the Purchasing Power Parity Puzzles," CEPR Discussion Papers 2658, C.E.P.R. Discussion Papers.
  5. Alan M. Taylor & Mark Taylor, 2004. "The Purchasing Power Parity Debate," Working Papers 46, University of California, Davis, Department of Economics.
  6. Lothian, James R. & Taylor, Mark P., 2006. "Real Exchange Rates Over the Past Two Centuries : How Important is the Harrod-Balassa-Samuelson Effect?," The Warwick Economics Research Paper Series (TWERPS) 768, University of Warwick, Department of Economics.
  7. Patel, Jayendu, 1990. "Purchasing Power Parity as a Long-Run Relation," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 5(4), pages 367-79, Oct.-Dec..
  8. Enders, Walter, 1988. "ARIMA and Cointegration Tests of PPP under Fixed and Flexible Exchange Rate Regimes," The Review of Economics and Statistics, MIT Press, vol. 70(3), pages 504-08, August.
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Cited by:
  1. Yamin Ahmad & Ming Chien Lo & Olena Mykhaylova, 2011. "Volatility and Persistence of Simulated DSGE Real Exchange Rates," Working Papers 11-01, UW-Whitewater, Department of Economics, revised Nov 2012.
  2. Yamin Ahmad & Ming Chien Lo & Olena Mykhaylova, 2012. "Causes of Nonlinearities in low order models of the real exchange rate," Working Papers 12-01, UW-Whitewater, Department of Economics, revised Mar 2013.

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