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PPP: a Disaggregated View

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  • Fischer, Christoph

Abstract

By disaggregating price indices, it becomes apparent that the real exchange rate consists of the real exchange rate for a single good and a weighted sum of relative prices between goods. When applying a battery of panel unit root tests to this sum and its components, it is found that both the sum and the relative prices are non-stationary. This implies that PPP is invalid even if the LOP holds for all goods. The findings contrast with the result from panel unit root tests that real exchange rates as a whole are stationary. Several suggestions for solving the conflict are discussed. --

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Bibliographic Info

Paper provided by Deutsche Bundesbank, Research Centre in its series Discussion Paper Series 1: Economic Studies with number 2004,07.

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Date of creation: 2004
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Handle: RePEc:zbw:bubdp1:1820

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Keywords: purchasing power parity; real exchange rate; panel unit root tests;

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References

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Cited by:
  1. Fischer, Christoph & Porath, Daniel, 2006. "A reappraisal of the evidence on PPP: a systematic investigation into MA roots in panel unit root tests and their implications," Discussion Paper Series 1: Economic Studies 2006,23, Deutsche Bundesbank, Research Centre.
  2. Bernd Schnatz, 2007. "Is reversion to PPP in euro exchange rates non-linear?," International Economics and Economic Policy, Springer, Springer, vol. 4(3), pages 281-297, November.

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