PPP Over a Century: Cointegration and Structural Change

8 Pages Posted: 19 May 2006

Date Written: February 2006


The purpose of this paper is to investigate the ability of parameter instability tests in regressions with I(1) processes to discriminate between changes in the cointegrating relationship and changes in the marginal distribution of the regressors. Using annual data for the G-7 countries and the Purchasing Power Parity, we conclude that the regression coefficient between the price level differential and the exchange rate has indeed remained stable during the 20th century and find ample evidence supporting the PPP.

Keywords: cointegration estimators, PPP, structural change, small-sample properties, structural stability tests

JEL Classification: F31, C13, C22

Suggested Citation

Panopoulou, Ekaterini, PPP Over a Century: Cointegration and Structural Change (February 2006). Available at SSRN: https://ssrn.com/abstract=889334 or http://dx.doi.org/10.2139/ssrn.889334

Ekaterini Panopoulou (Contact Author)

Essex Business School ( email )

Wivenhoe Park
Colchester, CO4 3SQ
United Kingdom

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