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Purchasing Power Parity: the Choice of Price Index

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  • Maria Cristina T. Terra
  • Ana Lucia Vahia de Abreu

Abstract

Looking closely at the PPP argument, it states that the currencies purchasing power should not change when comparing the same basket goods across countries, and these goods should all be tradable. Hence, if PPP is valid at all, it should be captured by the relative price indices that best fits these two features. We ran a horse race among six different price indices available from the IMF database to see which one would yield higher PPP evidence, and, therefore, better fit the two features. We used RER proxies measured as the ratio of export unit values, wholesale prices, value added deflators, unit labor costs, normalized unit labor costs and consumer prices, for a sample of 16 industrial countries, with quarterly data from 1975 to 2002. PPP was tested using both the ADF and the DF-GLS unit root test of the RER series. The RER measured as WPI ratios was the one for which PPP evidence was found for the larger number of countries: six out of sixteen. The worst measure of all was the RER based on the ratio of foreign CPIs and domestic WPI. No evidence of PPP at all was found for this measure

Suggested Citation

  • Maria Cristina T. Terra & Ana Lucia Vahia de Abreu, 2004. "Purchasing Power Parity: the Choice of Price Index," Econometric Society 2004 Latin American Meetings 247, Econometric Society.
  • Handle: RePEc:ecm:latm04:247
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    References listed on IDEAS

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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. Elliott, Graham, 1999. "Efficient Tests for a Unit Root When the Initial Observation Is Drawn from Its Unconditional Distribution," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 40(3), pages 767-783, August.
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    8. Froot, Kenneth A. & Rogoff, Kenneth, 1995. "Perspectives on PPP and long-run real exchange rates," Handbook of International Economics,in: G. M. Grossman & K. Rogoff (ed.), Handbook of International Economics, edition 1, volume 3, chapter 32, pages 1647-1688 Elsevier.
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    10. Takatoshi Ito & Tamim Bayoumi & Peter Isard & Steven A. Symansky, 1996. "Exchange Rate Movements and Their Impact on Trade and Investment in the APEC Region," IMF Occasional Papers 145, International Monetary Fund.
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    Cited by:

    1. Fabio Araujo & Joao Victor Issler, 2005. "Estimating the Stochastic Discount Factor without a Utility Function," Computing in Economics and Finance 2005 202, Society for Computational Economics.
    2. Bonomo, Marco Antônio Cesar & Terra, Maria Cristina T., 2005. "Special interests and political business cycles," FGV/EPGE Economics Working Papers (Ensaios Economicos da EPGE) 597, FGV/EPGE - Escola Brasileira de Economia e Finanças, Getulio Vargas Foundation (Brazil).
    3. Cysne, Rubens Penha, 2006. "An intra-household approach to the welfare costs of inflation (Revised Version, Forthcoming 2006, Estudos Econômicos)," FGV/EPGE Economics Working Papers (Ensaios Economicos da EPGE) 612, FGV/EPGE - Escola Brasileira de Economia e Finanças, Getulio Vargas Foundation (Brazil).
    4. Flôres Junior, Renato Galvão & Watanuki, Masakazu, 2006. "Integration options for mercosul - an investigation Uusing the AMIDA Model," FGV/EPGE Economics Working Papers (Ensaios Economicos da EPGE) 610, FGV/EPGE - Escola Brasileira de Economia e Finanças, Getulio Vargas Foundation (Brazil).
    5. Barbosa, Fernando de Holanda, 2005. "The contagion effect of public debt on monetary policy: the brazilian experience," FGV/EPGE Economics Working Papers (Ensaios Economicos da EPGE) 591, FGV/EPGE - Escola Brasileira de Economia e Finanças, Getulio Vargas Foundation (Brazil).
    6. Cysne, Rubens Penha, 2006. "Income inequality in a job-search model with heterogeneous discount factors: (revised version, forthcoming 2006, Revista Economia)," FGV/EPGE Economics Working Papers (Ensaios Economicos da EPGE) 611, FGV/EPGE - Escola Brasileira de Economia e Finanças, Getulio Vargas Foundation (Brazil).

    More about this item

    Keywords

    Real exchange rate; price indices; purchasing power parity;

    JEL classification:

    • F31 - International Economics - - International Finance - - - Foreign Exchange
    • F41 - International Economics - - Macroeconomic Aspects of International Trade and Finance - - - Open Economy Macroeconomics

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