Purchasing Power Parity: A Unit Root, Cointegration and VAR Analysis in Emerging and Advanced Countries

19 Pages Posted: 7 Nov 2014

See all articles by Georgios Loukopoulos

Georgios Loukopoulos

The Open University

Dimitrios Antonopoulos

Athens University of Economics and Business - Department of Accounting and Finance; University of Patras, Department of Business Administration

Date Written: November 5, 2014

Abstract

The purpose of this study is to investigate the validity of the absolute version of the purchasing power parity (PPP) of a sample of four advanced and four emerging countries covering the period from 1993 to 2014. To examine the existence of PPP we apply the Augmented Dickey-Fuller, DF-GLS and KPSS tests for non-stationarity, and the Johansen procedure for cointegration between exchange rates and consumer price indices. The impulse response function presents a graphical view which is consistent with impressions from the statistics of stationarity tests. We also employ the variance decomposition method to analyze the movements in the exchange rates and the price indices that are caused by their own shocks, and shocks caused by other variables. With respect to half-life estimates, the results from a shock to the real exchange rate range from 9,76 to 77,39 months. Overall, unit root tests show that absolute PPP may hold, but this depends on the country and the selected method. In contrast, the Johansen approach does not support the existence of PPP in any country.

Keywords: Purchasing Power Parity, Exchange Rate, Unit Root, Half-Life, Cointegration, VAR, Impulse Response, Variance Decomposition

JEL Classification: C12, C15, C22, E31, F31, G15

Suggested Citation

Loukopoulos, Georgios and Antonopoulos, Dimitrios, Purchasing Power Parity: A Unit Root, Cointegration and VAR Analysis in Emerging and Advanced Countries (November 5, 2014). Available at SSRN: https://ssrn.com/abstract=2519767 or http://dx.doi.org/10.2139/ssrn.2519767

Georgios Loukopoulos (Contact Author)

The Open University ( email )

Walton Hall
Milton Keynes, MK6 7AA
United Kingdom

Dimitrios Antonopoulos

Athens University of Economics and Business - Department of Accounting and Finance ( email )

76 Patission Street
GR-104 34 Athens
Greece

University of Patras, Department of Business Administration ( email )

Patras
Greece

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