Are Real Interest Rates Equal Across Countries? An Empirical Investigation of International Parity Conditions

  • Author(s): FREDERIC S. MISHKIN
  • Published: Apr 30, 2012
  • Pages: 1345-1357
  • DOI: 10.1111/j.1540-6261.1984.tb04911.x


This paper conducts empirical tests of the equality of real interest rates across countries. The empirical evidence strongly rejects the hypothesis of real rate equality and the joint hypotheses of uncovered interest parity and ex ante relative PPP, or the unbiasedness of forward rate forecasts and ex ante relative PPP. The evidence suggests that it is worth studying open economy macroeconomic models which allow: 1) domestic real rates to differ from world rates, 2) time varying risk premiums in the forward market, or 3) deviations from ex ante relative PPP.

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