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Sustainable Monetary Policy and Expectations


  • Roc Armenter

    () (International Research Function Federal Reserve Bank of New York)


Infinitely repeated games have been used to argue that reputation can substitute for commitment in monetary policymaking. A drawback of this approach is that it implies multiple equilibria. I argue that nominal asset prices can be used as an equilibrium selection mechanism. First, I introduce real and nominal asset trading in a way that preserves the full equilibrium set. I then analyze the subset of sustainable policies compatible with a given asset price schedule. I show that the best sustainable monetary policy is implemented if and only if the short term nominal bond is priced at a certain value at date t=0. Hence, if the monetary authority is a price-setter in the short term nominal bond market at date t=0, it can effectively coordinate expectations on the best sustainable policy. However, if the monetary authority can set nominal asset prices at all dates, then the equilibrium set collapses to the subset of one-period equilibria

Suggested Citation

  • Roc Armenter, 2006. "Sustainable Monetary Policy and Expectations," 2006 Meeting Papers 183, Society for Economic Dynamics.
  • Handle: RePEc:red:sed006:183

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    References listed on IDEAS

    1. Timothy Cogley & Riccardo Colacito & Thomas J. Sargent, 2007. "Benefits from U.S. Monetary Policy Experimentation in the Days of Samuelson and Solow and Lucas," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 39(s1), pages 67-99, February.
    2. Marcet, Albert & Sargent, Thomas J., 1989. "Convergence of least squares learning mechanisms in self-referential linear stochastic models," Journal of Economic Theory, Elsevier, vol. 48(2), pages 337-368, August.
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    4. Thomas J. Sargent & Noah Williams, 2005. "Impacts of Priors on Convergence and Escapes from Nash Inflation," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 8(2), pages 360-391, April.
    5. William A. Brock & Cars H. Hommes, 1997. "A Rational Route to Randomness," Econometrica, Econometric Society, vol. 65(5), pages 1059-1096, September.
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    7. Timothy Cogley & Thomas Sargent & Riccardo Colacito, 2005. "Benefits from U.S. Monetary Policy Experimentation in the Days of Samuelson," 2005 Meeting Papers 791, Society for Economic Dynamics.
    8. Sargent, Thomas J, 1976. "The Observational Equivalence of Natural and Unnatural Rate Theories of Macroeconomics," Journal of Political Economy, University of Chicago Press, vol. 84(3), pages 631-640, June.
    9. Evan W. Anderson & Lars Peter Hansen & Thomas J. Sargent, 2003. "A Quartet of Semigroups for Model Specification, Robustness, Prices of Risk, and Model Detection," Journal of the European Economic Association, MIT Press, vol. 1(1), pages 68-123, March.
    10. Vuong, Quang H, 1989. "Likelihood Ratio Tests for Model Selection and Non-nested Hypotheses," Econometrica, Econometric Society, vol. 57(2), pages 307-333, March.
    11. Aghion, Philippe & Bacchetta, Philippe & Banerjee, Abhijit, 2001. "Currency crises and monetary policy in an economy with credit constraints," European Economic Review, Elsevier, vol. 45(7), pages 1121-1150.
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    More about this item


    Monetary Policy; Reputation; Equilibrium Selection;

    JEL classification:

    • E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy
    • E58 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Central Banks and Their Policies
    • E61 - Macroeconomics and Monetary Economics - - Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook - - - Policy Objectives; Policy Designs and Consistency; Policy Coordination


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