Parity theorems revisited: An ARDL bound test with non-parity factors

Mohamed Ariff*, Alireza Zarei

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)
164 Downloads (Pure)


The research question addressed in this paper is, do inflation and interest rate differences across two major economies fully drive the long-run exchange rate changes if controls for non-parity factors are embedded? Exchange rate behaviour research is once again an interesting topic given the availability of powerful econometric approaches to resolve unsolved issues. We re-examine the exchange rate behaviour of the US economy, applying a more appropriate econometric model using 55 years of quarterly data. The model explains 96% of variation in exchange rates, which testifies to the model’s appropriateness. The error correction estimate indicates a time-to-equilibrium of 0.139 per quarter; that is, full adjustment takes seven quarters. Tests indicate evidence of a long-run relationship among the exchange rate, prices, and interest rates. The coefficients on both parity factors (prices and interest rates) are statistically significant with correct theory-suggested signs. These findings constitute strong evidence in support of parity and non-parity theorems while confirming that the US currency behaviour over 1960-2014 is consistent with parity and non-parity theories.

Original languageEnglish
Pages (from-to)1-26
Number of pages26
JournalAsian Academy of Management Journal of Accounting and Finance
Issue number1
Publication statusPublished - 1 Jan 2015
Externally publishedYes


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