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Les zones monétaires optimales

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  • Lafrance, Robert

    (Banque du Canada)

  • St-Amant, Pierre

    (Banque du Canada)

Abstract

This paper surveys the recent literature on optimal currency areas (OCAs). Topics that are covered include theoretical developments in the context of general-equilibrium models and empirical work on shocks asymmetry and adjustment mechanisms. Issues relating to the endogeneity of OCA criteria, the role of exchange rate flexibility in promoting greater macroeconomic stability, and the link between productivity and the exchange rate are also surveyed. We conclude with suggestions for future research. La présente étude est une recension des écrits publiés récemment sur les zones monétaires optimales (ZMO). Elle traite notamment des travaux théoriques effectués dans le cadre des modèles d’équilibre général et des travaux empiriques sur l’asymétrie des chocs et les mécanismes d’ajustement. Parmi les autres sujets qui y sont abordés, il convient de mentionner le caractère endogène des critères de détermination des ZMO, le rôle de la flexibilité du taux de change dans la promotion d’une plus grande stabilité macroéconomique et les liens entre la productivité et le taux de change. Nous suggérons en conclusion certaines avenues de recherche à explorer.

Suggested Citation

  • Lafrance, Robert & St-Amant, Pierre, 2000. "Les zones monétaires optimales," L'Actualité Economique, Société Canadienne de Science Economique, vol. 76(4), pages 577-612, décembre.
  • Handle: RePEc:ris:actuec:v:76:y:2000:i:4:p:577-612
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    1. Frankel, Jeffrey A & Rose, Andrew K, 1998. "The Endogeneity of the Optimum Currency Area Criteria," Economic Journal, Royal Economic Society, vol. 108(449), pages 1009-1025, July.
    2. Lapan, Harvey E. & Enders, Walter, 1980. "Random disturbances and the choice of exchange regimes in an intergenerational model," Journal of International Economics, Elsevier, vol. 10(2), pages 263-283, May.
    3. Flood, Robert P. & Rose, Andrew K., 1995. "Fixing exchange rates A virtual quest for fundamentals," Journal of Monetary Economics, Elsevier, vol. 36(1), pages 3-37, August.
    4. Masson,Paul R. & Taylor,Mark P. (ed.), 1993. "Policy Issues in the Operation of Currency Unions," Cambridge Books, Cambridge University Press, number 9780521434553.
    5. Robert J. Gordon, 1997. "The Time-Varying NAIRU and Its Implications for Economic Policy," Journal of Economic Perspectives, American Economic Association, vol. 11(1), pages 11-32, Winter.
    6. John Murray, 1999. "Why Canada Needs a Flexible Exchange Rate," Staff Working Papers 99-12, Bank of Canada.
    7. Andrew Atkeson & Tamim Bayoumi, 1993. "Do private capital markets insure regional risk? Evidence from the United States and Europe," Open Economies Review, Springer, vol. 4(3), pages 303-324, September.
    8. Barro, Robert J & Sala-i-Martin, Xavier, 1992. "Convergence," Journal of Political Economy, University of Chicago Press, vol. 100(2), pages 223-251, April.
      • Barro, R.J. & Sala-I-Martin, X., 1991. "Convergence," Papers 645, Yale - Economic Growth Center.
      • Barro, Robert J. & Sala-i-Martin, Xavier, 1992. "Convergence," Scholarly Articles 3451299, Harvard University Department of Economics.
    9. Torres,Francisco & Giavazzi,Francesco (ed.), 1993. "Adjustment and Growth in the European Monetary Union," Cambridge Books, Cambridge University Press, number 9780521440196.
    10. Asea, Patrick K & Mendoza, Enrique G, 1994. "The Balassa-Samuelson Model: A General-Equilibrium Appraisal," Review of International Economics, Wiley Blackwell, vol. 2(3), pages 244-267, October.
    11. Bent E. S�rensen & Oved Yosha, 1998. "International Risk Sharing and European Monetary Unification," Temi di discussione (Economic working papers) 327, Bank of Italy, Economic Research and International Relations Area.
    12. John F. Helliwell & Ross McKitrick, 1999. "Comparing Capital Mobility Across Provincial and National Borders," Canadian Journal of Economics, Canadian Economics Association, vol. 32(5), pages 1164-1173, November.
    13. Paul A. Samuelson, 1958. "An Exact Consumption-Loan Model of Interest with or without the Social Contrivance of Money," Journal of Political Economy, University of Chicago Press, vol. 66(6), pages 467-467.
    14. David Laidler, 1999. "The Exchange Rate Regime and Canada's Monetary Order," Staff Working Papers 99-7, Bank of Canada.
    15. Stockman, Alan C & Tesar, Linda L, 1995. "Tastes and Technology in a Two-Country Model of the Business Cycle: Explaining International Comovements," American Economic Review, American Economic Association, vol. 85(1), pages 168-185, March.
    16. Bayoumi, Tamim & Eichengreen, Barry, 1998. "Exchange rate volatility and intervention: implications of the theory of optimum currency areas," Journal of International Economics, Elsevier, vol. 45(2), pages 191-209, August.
    17. Canzoneri,Matthew B. & Grilli,Vittorio & Masson,Paul R. (ed.), 1992. "Establishing a Central Bank," Cambridge Books, Cambridge University Press, number 9780521420983.
    18. Andrew K. Rose, 1994. "Are exchange rates macroeconomic phenomena?," Economic Review, Federal Reserve Bank of San Francisco, pages 19-30.
    19. Bullard, James & Keating, John W., 1995. "The long-run relationship between inflation and output in postwar economies," Journal of Monetary Economics, Elsevier, vol. 36(3), pages 477-496, December.
    20. Olivier Jean Blanchard & Lawrence F. Katz, 1992. "Regional Evolutions," Brookings Papers on Economic Activity, Economic Studies Program, The Brookings Institution, vol. 23(1), pages 1-76.
    21. John Y. Campbell, Robert J. Shiller, 1988. "The Dividend-Price Ratio and Expectations of Future Dividends and Discount Factors," The Review of Financial Studies, Society for Financial Studies, vol. 1(3), pages 195-228.
    22. Sorensen, Bent E. & Yosha, Oved, 1998. "International risk sharing and European monetary unification," Journal of International Economics, Elsevier, vol. 45(2), pages 211-238, August.
    23. Robert J. Barro & Xavier Sala-i-Martin, 1991. "Convergence across States and Regions," Brookings Papers on Economic Activity, Economic Studies Program, The Brookings Institution, vol. 22(1), pages 107-182.
    24. Matthew B. Canzoneri & Behzad Diba & Gwen Eudey, 1996. "Trends in European Productivity and Real Exchange Rates," Working Papers 9610, Banco de España.
    25. Stefano Athanasoulis & Eric Van Wincoop, 1998. "Risksharing within the United States: what have financial markets and fiscal federalism accomplished?," Research Paper 9808, Federal Reserve Bank of New York.
    26. Frank Smets, 1997. "Commentaire de l'article de F. Barran, V. Coudert et B. Mojon," Revue Française d'Économie, Programme National Persée, vol. 12(2), pages 159-176.
    27. French, Kenneth R & Poterba, James M, 1991. "Investor Diversification and International Equity Markets," American Economic Review, American Economic Association, vol. 81(2), pages 222-226, May.
    28. Bayoumi, Tamim & Masson, Paul R., 1995. "Fiscal flows in the United States and Canada: Lessons for monetary union in Europe," European Economic Review, Elsevier, vol. 39(2), pages 253-274, February.
    29. Tamim Bayoumi, 1994. "A Formal Model of Optimum Currency Areas," IMF Staff Papers, Palgrave Macmillan, vol. 41(4), pages 537-554, December.
    30. Ricci, Luca Antonio, 1995. "Exchange rate regimes and location," Discussion Papers, Series II 291, University of Konstanz, Collaborative Research Centre (SFB) 178 "Internationalization of the Economy".
    31. Tesar, Linda L. & Werner, Ingrid M., 1995. "Home bias and high turnover," Journal of International Money and Finance, Elsevier, vol. 14(4), pages 467-492, August.
    32. John Kareken & Neil Wallace, 1981. "On the Indeterminacy of Equilibrium Exchange Rates," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 96(2), pages 207-222.
    33. Mario Lefebvre & Stephen S. Poloz, 1996. "The Commodity-Price Cycle and Regional Economic Performance in Canada," Staff Working Papers 96-12, Bank of Canada.
    34. Richard C. Marston, 1988. "Misalignment of Exchange Rates: Effects on Trade and Industry," NBER Books, National Bureau of Economic Research, Inc, number mars88-1, July.
    35. Mario J. Crucini, 1999. "On International and National Dimensions of Risk Sharing," The Review of Economics and Statistics, MIT Press, vol. 81(1), pages 73-84, February.
    36. Canzoneri, Matthew B & Rogers, Carol Ann, 1990. "Is the European Community an Optimal Currency Area? Optimal Taxation versus the Cost of Multiple Currencies," American Economic Review, American Economic Association, vol. 80(3), pages 419-433, June.
    37. Willem H. Buiter, 1999. "The EMU and the NAMU: What is the Case for North American Monetary Union?," Canadian Public Policy, University of Toronto Press, vol. 25(3), pages 285-305, September.
    38. Helpman, Elhanan & Razin, Assaf, 1982. "A Comparison of Exchange Rate Regimes in the Presence of Imperfect Capital Markets," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 23(2), pages 365-388, June.
    39. Helpman, Elhanan, 1981. "An Exploration in the Theory of Exchange-Rate Regimes," Journal of Political Economy, University of Chicago Press, vol. 89(5), pages 865-890, October.
    40. Canzoneri, Matthew B & Diba, Behzad & Fudey, Gwen, 1996. "Trends in European Productivity and Real Exchange Rates: Implications for the Maastricht Convergence Criteria and for Inflation Targets after EMU," CEPR Discussion Papers 1417, C.E.P.R. Discussion Papers.
    41. Michel Beine & FréDéric Docquier, 1998. "A Stochastic Simulation Model of an Optimum Currency Area," Open Economies Review, Springer, vol. 9(3), pages 229-257, July.
    42. Artis, Michael J & Zhang, Wenda, 1997. "On Identifying the Core of EMU: An Exploration of Some Empirical Criteria," CEPR Discussion Papers 1689, C.E.P.R. Discussion Papers.
    43. Melitz, Jacques & Zumer, Frédéric, 1998. "Regional Redistribution and Stabilization by the Centre in Canada, France, the United Kingdom and the United States: New Estimates Based on Panel Data Econometrics," CEPR Discussion Papers 1829, C.E.P.R. Discussion Papers.
    44. Rose, Andrew K, 1996. "After the Deluge: Do Fixed Exchange Rates Allow Inter-temporal Volatility Tradeoffs?," International Journal of Finance & Economics, John Wiley & Sons, Ltd., vol. 1(1), pages 47-54, January.
    45. Maurice Obstfeld and Giovanni Peri., 1998. "Regional Nonadjustment and Fiscal Policy: Lessons for EMU," Center for International and Development Economics Research (CIDER) Working Papers C98-096, University of California at Berkeley.
    46. Alesina, Alberto & Wacziarg, Romain, 1999. "Is Europe going too far?," Carnegie-Rochester Conference Series on Public Policy, Elsevier, vol. 51(1), pages 1-42, December.
    47. Patrick K. Asea, 1994. "The Balassa-Samuelson Model: A General Equilibrium Appraisal," UCLA Economics Working Papers 709, UCLA Department of Economics.
    48. Eichengreen, Barry, 1993. "European Monetary Unification," Journal of Economic Literature, American Economic Association, vol. 31(3), pages 1321-1357, September.
    49. Lastrapes, William D, 1992. "Sources of Fluctuations in Real and Nominal Exchange Rates," The Review of Economics and Statistics, MIT Press, vol. 74(3), pages 530-539, August.
    50. Backus, David K & Kehoe, Patrick J & Kydland, Finn E, 1992. "International Real Business Cycles," Journal of Political Economy, University of Chicago Press, vol. 100(4), pages 745-775, August.
    51. Xavier Sala-i-Martin & Jeffrey Sachs, 1991. "Fiscal Federalism and Optimum Currency Areas: Evidence for Europe From the United States," NBER Working Papers 3855, National Bureau of Economic Research, Inc.
    52. Bela Balassa, 1964. "The Purchasing-Power Parity Doctrine: A Reappraisal," Journal of Political Economy, University of Chicago Press, vol. 72(6), pages 584-584.
    53. Melitz, Jacques, 1995. "The current impasse in research on optimum currency areas," European Economic Review, Elsevier, vol. 39(3-4), pages 492-500, April.
    54. repec:crs:wpaper:9516 is not listed on IDEAS
    55. Gerlach, Stefan & Smets, Frank, 1995. "The Monetary Transmission Mechanism: Evidence from the G-7 Countries," CEPR Discussion Papers 1219, C.E.P.R. Discussion Papers.
    56. Dornbusch, Rudiger, 1976. "Expectations and Exchange Rate Dynamics," Journal of Political Economy, University of Chicago Press, vol. 84(6), pages 1161-1176, December.
    57. Osakwe, Patrick N. & Schembri, Lawrence L., 2002. "Real effects of collapsing exchange rate regimes: an application to Mexico," Journal of International Economics, Elsevier, vol. 57(2), pages 299-325, August.
    58. Neumeyer, Pablo Andres, 1998. "Currencies and the Allocation of Risk: The Welfare Effects of a Monetary Union," American Economic Review, American Economic Association, vol. 88(1), pages 246-259, March.
    59. Hess, Gregory D. & Shin, Kwanho, 1998. "Intranational business cycles in the United States," Journal of International Economics, Elsevier, vol. 44(2), pages 289-313, April.
    60. Maurice Obstfeld & Kenneth Rogoff, 1995. "The Mirage of Fixed Exchange Rates," Journal of Economic Perspectives, American Economic Association, vol. 9(4), pages 73-96, Fall.
    61. Fernando Barran & Virginie Coudert & Benoît Mojon, 1997. "La transmission des politiques monétaires dans les pays européens," Revue Française d'Économie, Programme National Persée, vol. 12(2), pages 133-158.
    62. Tamim Bayoumi & Michael W. Klein, 1995. "A Provincial View of Capital Mobility," NBER Working Papers 5115, National Bureau of Economic Research, Inc.
    63. William H. Branson & James Love, 1988. "U.S. Manufacturing and the Real Exchange Rate," NBER Chapters, in: Misalignment of Exchange Rates: Effects on Trade and Industry, pages 241-276, National Bureau of Economic Research, Inc.
    64. Erkel-Rousse, Hélène & Melitz, Jacques, 1995. "New Empirical Evidence on the Costs of European Monetary Union," CEPR Discussion Papers 1169, C.E.P.R. Discussion Papers.
    65. Frankel, Jeffrey A. & Rose, Andrew K., 1997. "Is EMU more justifiable ex post than ex ante?," European Economic Review, Elsevier, vol. 41(3-5), pages 753-760, April.
    66. Bayoumi, Tamim & Eichengreen, Barry, 1996. "Operationalizing the Theory of Optimum Currency Areas," CEPR Discussion Papers 1484, C.E.P.R. Discussion Papers.
    67. Michael B. Devereux & Charles Engel, 1998. "Fixed vs. Floating Exchange Rates: How Price Setting Affects the Optimal Choice of Exchange-Rate Regime," NBER Working Papers 6867, National Bureau of Economic Research, Inc.
    68. Mr. Robert P Flood & Mr. Joshua Aizenman, 1992. "A Theory of Optimum Currency Areas: Revisited," IMF Working Papers 1992/039, International Monetary Fund.
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    Cited by:

    1. Jean-Pierre Allegret & Alain Sand-Zantman, 2007. "Transmission des chocs et mécanismes d'ajustement dans le Mercosur," Revue de l'OFCE, Presses de Sciences-Po, vol. 101(2), pages 355-392.
    2. Alain DeSerres & René Lalonde, "undated". "Symetrie des chocs touchant les regions canadiennes et choix d'un regime de change," Staff Working Papers 94-9, Bank of Canada.
    3. Jean-Pierre Allegret & Alain Sand-Zantman, 2009. "Modeling the Impact of Real and Financial Shocks on Mercosur: The Role of the Exchange Rate Regime," Open Economies Review, Springer, vol. 20(3), pages 359-384, July.
    4. Alain DeSerres & Alain Guay & Pierre St-Amant, 1995. "Estimating and Projecting Potential Output Using Structural VAR Methodology," Macroeconomics 9504003, University Library of Munich, Germany.
    5. Nick Chamie & Alain DeSerres & René Lalonde, "undated". "Optimum Currency Areas and Shock Asymmetry: A Comparison of Europe and the United States," Staff Working Papers 94-1, Bank of Canada.
    6. Daniel Racette & Jacques Raynauld & Christian Sigouin, "undated". "An Up-to-Date and Improved BVAR Model of the Canadian Economy," Staff Working Papers 94-4, Bank of Canada.
    7. Alain DeSerres & Alain Guay & Pierre St-Amant, "undated". "Estimating and Projecting Potential Output Using Structural VAR Methodology: The Case of the Mexican Economy," Staff Working Papers 95-2, Bank of Canada.
    8. Nick Chamie & Alain DeSerres & Rene Lalonde, 1994. "Optimum Currency Areas and Shock Asymmetry A Comparison of Europe and the United States," International Finance 9406001, University Library of Munich, Germany, revised 19 Aug 1994.
    9. Mario Lefebvre, 1995. "Les provinces canadiennes et la convergence : une evaluation empirique," Urban/Regional 9502001, University Library of Munich, Germany.
    10. Barry Cozier & Greg Tkacz, "undated". "The Term Structure and Real Activity in Canada," Staff Working Papers 94-3, Bank of Canada.
    11. Robert Amano & Paul Fenton & David Tessier & Simon van Norden, 1996. "The credibility of monetary policy: a survey of the literature with some simple applications to Caanda," Meeting papers 9610001, University Library of Munich, Germany.
    12. Pierre St-Amant & David Tessier, 1998. "Tendance des dépenses publiques et de l'inflation et évolution comparative du taux de chômage au Canada et aux États-Unis," Staff Working Papers 98-3, Bank of Canada.

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