TY - JOUR AU - Alesina,Alberto AU - Barro,Robert J. AU - Tenreyro,Silvana TI - Optimal Currency Areas JF - National Bureau of Economic Research Working Paper Series VL - No. 9072 PY - 2002 Y2 - July 2002 UR - http://www.nber.org/papers/w9072 L1 - http://www.nber.org/papers/w9072.pdf N1 - Author contact info: Alberto F. Alesina Department of Economics Harvard University Littauer Center 210 Cambridge, MA 02138 Tel: 617/495-8388 Fax: 617/495-7730 E-Mail: aalesina@harvard.edu Robert J. Barro Department of Economics Littauer Center 218 Harvard University Cambridge, MA 02138 Tel: 617/495-3203 Fax: 617/496-8629 E-Mail: rbarro@harvard.edu Silvana Tenreyro London School of Economics Department of Economics Houghton St, St. Clement's Building, S.600 London, WC2A 2AE United Kingdom Tel: 44-2079556018 E-Mail: S.Tenreyro@lse.ac.uk M1 - published as Alberto Alesina, Robert J. Barro, Silvana Tenreyro. "Optimal Currency Areas," in Mark Gertler and Kenneth Rogoff, editors, "NBER Macroeconomics Annual 2002, Volume 17" MIT Press (2003) AB - As the number of independent countries increases and their economies become more integrated, we would expect to observe more multi-country currency unions. This paper explores the pros and cons for different countries to adopt as an anchor the dollar, the euro, or the yen. Although there appear to be reasonably well-defined euro and dollar areas, there does not seem to be a yen area. We also address the question of how trade and co-movements of outputs and prices would respond to the formation of a currency union. This response is important because the decision of a country to join a union would depend on how the union affects trade and co-movements. ER -