Trade and the Number of Optimum Currency Areas in the World
This paper employs worldwide data on output and bilateral trade in order to identify optimum currency areas (OCA’s) on a global basis. By retaining only two of the many criteria that have been mentioned in the literature on OCA’s, it has been possible to use computer programming to do the identification. Based on the first of the two criteria, relating to trade, some large continental OCA’s can be discerned in the world. Adding the second criterion, which concerns symmetry-of-output-shocks, whittles down the size of the OCA’s. Nevertheless, some significant examples remain in the Americas, Europe and Asia, of which the European and the Asiatic are the most noteworthy.
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