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Gaps and Triangles


  • Adão, Bernardino
  • Correia, Isabel
  • Teles, Pedro


We derive principles of optimal short run monetary policy in a real business cycles model, with money and with monopolistic firms that set prices one period in advance. The only distortionary policy intruments are the nominal interest rates and the money supplies. In this environment it is feasible to undo both the cash in advance and the price setting restrictions. We show that the optimal allocation is achieved under the Friedman rule. We also show that, in general, it is not optimal to undo the restriction that prices are set one period in advance. Sticky prices provide the planner with tools to improve upon a distorted flexible prices allocation.

Suggested Citation

  • Adão, Bernardino & Correia, Isabel & Teles, Pedro, 2001. "Gaps and Triangles," CEPR Discussion Papers 2668, C.E.P.R. Discussion Papers.
  • Handle: RePEc:cpr:ceprdp:2668

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    References listed on IDEAS

    1. Aubhik Khan & Robert G. King & Alexander L. Wolman, 2003. "Optimal Monetary Policy," Review of Economic Studies, Oxford University Press, vol. 70(4), pages 825-860.
    2. Bernardino Adão & Isabel Horta Correia & Pedro Teles, 2005. "The Monetary Transmission Mechanism: is it Relevant for Policy?," Economic Bulletin and Financial Stability Report Articles, Banco de Portugal, Economics and Research Department.
    3. Isabel Correia & Juan Pablo Nicolini & Pedro Teles, 2008. "Optimal Fiscal and Monetary Policy: Equivalence Results," Journal of Political Economy, University of Chicago Press, vol. 116(1), pages 141-170, February.
    4. Charles T. Carlstrom & Timothy S. Fuerst, 1998. "Price-level and interest-rate targeting in a model with sticky prices," Working Paper 9819, Federal Reserve Bank of Cleveland.
    5. Greenwood, Jeremy & Hercowitz, Zvi & Huffman, Gregory W, 1988. "Investment, Capacity Utilization, and the Real Business Cycle," American Economic Review, American Economic Association, vol. 78(3), pages 402-417, June.
    6. Erceg, Christopher J. & Henderson, Dale W. & Levin, Andrew T., 2000. "Optimal monetary policy with staggered wage and price contracts," Journal of Monetary Economics, Elsevier, vol. 46(2), pages 281-313, October.
    7. Lucas, Robert Jr. & Stokey, Nancy L., 1983. "Optimal fiscal and monetary policy in an economy without capital," Journal of Monetary Economics, Elsevier, vol. 12(1), pages 55-93.
    8. Marvin Goodfriend & Robert King, 1997. "The New Neoclassical Synthesis and the Role of Monetary Policy," NBER Chapters,in: NBER Macroeconomics Annual 1997, Volume 12, pages 231-296 National Bureau of Economic Research, Inc.
    9. Charles T. Carlstrom & Timothy S. Fuerst, 1998. "A Note on the Role of Countercyclical Monetary Policy," Journal of Political Economy, University of Chicago Press, vol. 106(4), pages 860-889, August.
    10. Marvin Goodfriend & Robert G. King, 2001. "The Case for Price Stability," NBER Working Papers 8423, National Bureau of Economic Research, Inc.
    11. Ireland, Peter N, 1996. "The Role of Countercyclical Monetary Policy," Journal of Political Economy, University of Chicago Press, vol. 104(4), pages 704-723, August.
    12. Jordi Gali & Tommaso Monacelli, 1999. "Optimal Monetary Policy and Exchange Rate Volatility in a Small Open Economy," Boston College Working Papers in Economics 438, Boston College Department of Economics, revised 15 Nov 1999.
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    More about this item


    Friedman Rule; Optimal Cyclical Monetary Policy; Prices Set In Advance;

    JEL classification:

    • E31 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Price Level; Inflation; Deflation
    • E41 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Demand for Money
    • E58 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Central Banks and Their Policies
    • E62 - Macroeconomics and Monetary Economics - - Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook - - - Fiscal Policy


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