Are Real Exchange Rates Nonlinear or Nonstationary? Evidence from a New Threshold Unit Root Test

Erdem Basci and Mehmet Caner

Studies in Nonlinear Dynamics & Econometrics, 2005, vol. 9, issue 4, 21

Abstract: We analyze the post-float real exchange rates for a group of OECD countries using the newly developed threshold test and tests for unit roots against stationary but nonlinear alternative by Caner and Hansen ( 2001). These tools help us disentangle the nonlinearity from the nonstationarity rigorously for the first time in the literature. After applying the threshold test and unit root tests: we find evidence for non-linearity of exchange rates. Specifically real exchange rates behave like a unit root in a band and when the depreciation or appreciation of the currency against $US exceeds the boundaries of the band , the real exchange rates are mean-reverting. The threshold value is treated as unknown and estimated in the model.

Date: 2005
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DOI: 10.2202/1558-3708.1273

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