The Harrod-Balassa-Samuelson Hypothesis: Real Exchange Rates and their Long-Run Equilibrium
Frictionless, perfectly competitive traded-goods markets justify thinking of purchasing power parity (PPP) as the main driver of exchange rates in the long-run. But differences in the traded/non-traded sectors of economies tend to be persistent and affect movements in local price levels in ways that upset the PPP balance (the underpinning of the Harrod-Balassa-Samuelson hypothesis, HBS). This paper uses panel-data techniques on a broad collection of countries to investigate the long-run properties of the PPP/HBS equilibrium using novel local projection methods for cointegrated systems. These semi-parametric methods isolate the long-run behavior of the data from contaminating factors such as frictions not explicitly modelled and thought to have effects only in the short-run. Absent the short-run effects, we find that the estimated speed of reversion to long-run equilibrium is much higher. In addition, the HBS effects means that the real exchange rate is converging not to a steady mean, but to a slowly to a moving target. The common failure to properly model this effect also biases the estimated speed of reversion downwards. Thus, the so-called "PPP puzzle" is not as bad as we thought.
|Date of creation:||Apr 2010|
|Date of revision:|
|Publication status:||published as Yanping Chong & Òscar Jordà & Alan M. Taylor, 2012. "The Harrod–Balassa–Samuelson Hypothesis: Real Exchange Rates And Their Long‐Run Equilibrium," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 53(2), pages 609-634, 05.|
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- Pedroni, Peter, 2004.
"Panel Cointegration: Asymptotic And Finite Sample Properties Of Pooled Time Series Tests With An Application To The Ppp Hypothesis,"
Cambridge University Press, vol. 20(03), pages 597-625, June.
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- Laszlo Halpern & Charles Wyplosz, 2001. "Economic Transformation and Real Exchange Rates in the 2000s: The Balassa-Samuelson Connection," ECE Discussion Papers Series 2001_1, UNECE.
- Damiaan Persyn, 2008. "XTWEST: Stata module for testing for cointegration in heterogeneous panels," Statistical Software Components S456941, Boston College Department of Economics, revised 29 Jun 2010.
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