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Public and Private Information in Monetary Policy Models

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  • Jeffery Amato
  • Hyun Song Shin

Abstract

We examine the impact of public information in an economy where agents also have diverse private information. Our work builds on seminal contributions by Townsend (1983) and Phelps (1983), and more recently Woodford (2002), which emphasized the importance of higher-order beliefs – that is, beliefs about the beliefs of others – in an environment where agents’ interests are intertwined. Following Woodford, our focus is on the pricing behaviour of monopolistically competitive firms, where the intertwining of interests arises from strategic complementarity in the pricing decisions of firms. In setting prices, firms try to second-guess prices set by their competitors. Our analysis proceeds in two steps. Beginning with a series of simplified examples, we show how differentially informed firms follow pricing rules that suppress their own information, but instead put disproportionately large weight on commonly shared information. For reasonable degrees of strategic complementarity, the aggregate price suffers substantial information loss, and therefore ceases to be an informative signal of the underlying demand and cost conditions. We follow this up by developing a general equilibrium model incorporating households and the central bank. We find that the disproportionate role of public information degrades the informational value of economic outcomes for firms and the policymaker alike, alters the welfare consequences of increased precision of public information and generates distinctive time series characteristics of some macro variables. In part, these results extend a recent finding by Morris and Shin (2002) that increased precision of public information may impair social welfare in a game of second-guessing reminiscent of Keynes's `beauty contest'. Finally, we trace out the welfare implications of different parametrizations of the policy rule, particularly focusing upon the implications of the relative precision of private and public information

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Paper provided by UCLA Department of Economics in its series Levine's Bibliography with number 666156000000000092.

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Date of creation: 21 Aug 2003
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Handle: RePEc:cla:levrem:666156000000000092

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  1. Woodford, M., 1999. "Optimal Monetary Policy Inertia.," Papers 666, Stockholm - International Economic Studies.
  2. Lars E. O. Svensson, 2003. "What is Wrong with Taylor Rules? Using Judgment in Monetary Policy through Targeting Rules," NBER Working Papers 9421, National Bureau of Economic Research, Inc.
  3. Stephen Morris & Hyun Song Shin, 2002. "Social Value of Public Information," American Economic Review, American Economic Association, vol. 92(5), pages 1521-1534, December.
  4. Adam, Klaus, 2004. "Optimal Monetary Policy with Imperfect Common Knowledge," CEPR Discussion Papers 4594, C.E.P.R. Discussion Papers.
  5. Ben S. Bernanke & Michael Woodford, 1997. "Inflation Forecasts and Monetary Policy," NBER Working Papers 6157, National Bureau of Economic Research, Inc.
  6. Lars E.O. Svensson, 2002. "Monetary Policy and Real Stabilization," Working Papers 119, Princeton University, Department of Economics, Center for Economic Policy Studies..
  7. Marc P. Giannoni & Michael Woodford, 2003. "Optimal Interest-Rate Rules: I. General Theory," NBER Working Papers 9419, National Bureau of Economic Research, Inc.
  8. Shin, Hyun Song & Williamson, Timothy, 1996. "How Much Common Belief Is Necessary for a Convention?," Games and Economic Behavior, Elsevier, vol. 13(2), pages 252-268, April.
  9. Franklin Allen & Stephen Morris & Hyun Song Shin, 2003. "Beauty Contests, Bubbles and Iterated Expectations in Asset Markets," Cowles Foundation Discussion Papers 1406, Cowles Foundation for Research in Economics, Yale University.
  10. Lars E.O. Svensson & Michael Woodford, 2004. "Implementing Optimal Policy through Inflation-Forecast Targeting," NBER Chapters, in: The Inflation-Targeting Debate, pages 19-92 National Bureau of Economic Research, Inc.
  11. Philippe Bacchetta & Eric van Wincoop, 2003. "Can Information Heterogeneity Explain the Exchange Rate Determination Puzzle?," Working Papers 03.02, Swiss National Bank, Study Center Gerzensee.
  12. Vestin, David, 2000. "Price-level Targeting versus Inflation Targeting in a Forward-looking Model," Working Paper Series 106, Sveriges Riksbank (Central Bank of Sweden).
  13. Christian Hellwig, 2002. "Public Announcements, Adjustment Delays, and the Business Cycle (November 2002)," UCLA Economics Online Papers 208, UCLA Department of Economics.
  14. Kenneth Kasa, 1995. "Signal extraction and the propagation of business cycles," Working Papers in Applied Economic Theory 95-14, Federal Reserve Bank of San Francisco.
  15. Townsend, Robert M, 1983. "Forecasting the Forecasts of Others," Journal of Political Economy, University of Chicago Press, vol. 91(4), pages 546-88, August.
  16. Sims, Christopher A., 2003. "Implications of rational inattention," Journal of Monetary Economics, Elsevier, vol. 50(3), pages 665-690, April.
  17. Samet, Dov, 1998. "Iterated Expectations and Common Priors," Games and Economic Behavior, Elsevier, vol. 24(1-2), pages 131-141, July.
  18. Bomfim, Antulio N., 2001. "Measurement error in general equilibrium: the aggregate effects of noisy economic indicators," Journal of Monetary Economics, Elsevier, vol. 48(3), pages 585-603, December.
  19. Taylor, John B., 1993. "Discretion versus policy rules in practice," Carnegie-Rochester Conference Series on Public Policy, Elsevier, vol. 39(1), pages 195-214, December.
  20. Joseph G. Pearlman & Thomas J. Sargent, 2005. "Knowing the Forecasts of Others," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 8(2), pages 480-497, April.
  21. Michael Woodford, 2001. "Imperfect Common Knowledge and the Effects of Monetary Policy," NBER Working Papers 8673, National Bureau of Economic Research, Inc.
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