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Title: Irving Fisher, Expectational Errors, and the UIP Puzzle

Author(s): Rachel Campbell, Kees Koedijk, James R Lothian and Ronald J Mahieu

Publication Date: May 2007

Keyword(s): Expectations formation, Irving Fisher, small-sample problems and UIP

Programme Area(s): Financial Economics

Abstract: We review Irving Fisher?s seminal work on UIP and on the closely related equation linking interest rates and inflation. Like Fisher, we find that the failures of UIP are connected to individual episodes in which errors surrounding exchange rate expectations are persistent, but eventually transitory. We find considerable commonality in deviations from UIP and PPP, suggesting that both of these deviations are driven by a common factor. Using a dynamic latent factor model, we find that deviations from UIP are almost entirely due to forecasting errors in exchange rates, a result consistent with those reported by Fisher a century ago.

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Bibliographic Reference

Campbell, R, Koedijk, K, Lothian, J and Mahieu, R. 2007. 'Irving Fisher, Expectational Errors, and the UIP Puzzle'. London, Centre for Economic Policy Research. https://cepr.org/active/publications/discussion_papers/dp.php?dpno=6294