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Monetary policy, parameter uncertainty and optimal learning

  • Wieland, Volker

Since central banks have limited information concerning the transmission channel of monetary policy, they are faced with the difficult task of simultaneously controlling the policy target and estimating the impact of policy actions. A tradeoff between estimation and control arises because policy actions influence estimation and provide information which may improve future performance. I analyze this tradeoff in a simple model with parameter uncertainty and conduct dynamic simulations of the policymaker's decision problem in the presence of the type of uncertainties that arose in the wake of German reunification. A policy that separates learning from control may induce a persistent upward bias in money growth and inflation, just as observed after unification. In contrast, the optimal learning strategy which exploits the tradeoff between control and estimation significantly improves stabilization performance and reduces the likelihood of inflationary bias.

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Paper provided by ZEI - Center for European Integration Studies, University of Bonn in its series ZEI Working Papers with number B 09-1999.

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Date of creation: 1999
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Handle: RePEc:zbw:zeiwps:b091999
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  1. Tödter, Karl-Heinz & Ziebarth, Gerhard, 1997. "Price stability versus low inflation in Germany: An analysis of costs and benefits," Discussion Paper Series 1: Economic Studies 1997,03e, Deutsche Bundesbank, Research Centre.
  2. Christina D. Romer & David H. Romer, 1997. "Reducing Inflation: Motivation and Strategy," NBER Books, National Bureau of Economic Research, Inc, number rome97-1, July.
  3. Alan S. Blinder, 1999. "Central Banking in Theory and Practice," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262522608, June.
  4. Craine, Roger, 1979. "Optimal monetary policy with uncertainty," Journal of Economic Dynamics and Control, Elsevier, vol. 1(1), pages 59-83, February.
  5. Kasa, Kenneth, 1999. "Will the Fed Ever Learn?," Journal of Macroeconomics, Elsevier, vol. 21(2), pages 279-292, April.
  6. Kendrick, David, 1982. "Caution and probing in a macroeconomic model," Journal of Economic Dynamics and Control, Elsevier, vol. 4(1), pages 149-170, November.
  7. von Hagen, Jürgen, 1992. "Monetary Union, Money Demand and Money Supply: A Review of the German Monetary Union," CEPR Discussion Papers 719, C.E.P.R. Discussion Papers.
  8. Taylor, John B, 1974. "Asymptotic Properties of Multiperiod Control Rules in the Linear Regression Model," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 15(2), pages 472-84, June.
  9. Basar, Tamer & Salmon, Mark, 1987. "Credibility and the Value of Information Transmission in a Model of Monetary Policy and Inflation," The Warwick Economics Research Paper Series (TWERPS) 289, University of Warwick, Department of Economics.
  10. Karl-Heinz Tödter & Hans-Eggert Reimers, 1994. "P-Star as a link between money and prices in Germany," Review of World Economics (Weltwirtschaftliches Archiv), Springer, vol. 130(2), pages 273-289, June.
  11. P. Tinsley & P. von zur Muehlen, 1982. "A maximum probability approach to short-run policy," Special Studies Papers 168, Board of Governors of the Federal Reserve System (U.S.).
  12. 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.
  13. Michael Scharnagl, 1998. "The stability of German money demand: Not just a myth," Empirical Economics, Springer, vol. 23(3), pages 355-370.
  14. Balvers, Ronald J & Cosimano, Thomas F, 1994. "Inflation Variability and Gradualist Monetary Policy," Review of Economic Studies, Wiley Blackwell, vol. 61(4), pages 721-38, October.
  15. Clarida, R. & Gertler, M., 1996. "How the Bundesbank Conducts Monetary Policy," Working Papers 96-14, C.V. Starr Center for Applied Economics, New York University.
  16. Prescott, Edward C, 1972. "The Multi-Period Control Problem Under Uncertainty," Econometrica, Econometric Society, vol. 40(6), pages 1043-58, November.
  17. Douglas O. Staiger & James H. Stock & Mark W. Watson, 1997. "How Precise Are Estimates of the Natural Rate of Unemployment?," NBER Chapters, in: Reducing Inflation: Motivation and Strategy, pages 195-246 National Bureau of Economic Research, Inc.
  18. Mizrach, Bruce, 1991. "Nonconvexities in a stochastic control problem with learning," Journal of Economic Dynamics and Control, Elsevier, vol. 15(3), pages 515-538, July.
  19. Bertocchi, Graziella & Spagat, Michael, 1993. "Learning, experimentation, and monetary policy," Journal of Monetary Economics, Elsevier, vol. 32(1), pages 169-183, August.
  20. Wolters, Jürgen & Teräsvirta, Timo & Lütkepohl, Helmut, 1996. "Modelling the Demand for M3 in the unified Germany," SSE/EFI Working Paper Series in Economics and Finance 113, Stockholm School of Economics.
  21. Hallman, Jeffrey J & Porter, Richard D & Small, David H, 1991. "Is the Price Level Tied to the M2 Monetary Aggregate in the Long Run?," American Economic Review, American Economic Association, vol. 81(4), pages 841-58, September.
  22. Stefan Gerlach, 1994. "German unification and the demand for German M3," BIS Working Papers 21, Bank for International Settlements.
  23. Linda S. Kole & Ellen E. Meade, 1995. "German monetary targeting: a retrospective view," Federal Reserve Bulletin, Board of Governors of the Federal Reserve System (U.S.), issue Oct, pages 917-931.
  24. Kiefer, Nicholas M & Nyarko, Yaw, 1989. "Optimal Control of an Unknown Linear Process with Learning," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 30(3), pages 571-86, August.
  25. Amman, Hans M & Kendrick, David A, 1995. "Nonconvexities in Stochastic Control Models," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 36(2), pages 455-75, May.
  26. Caplin, Andrew & Leahy, John, 1996. "Monetary Policy as a Process of Search," American Economic Review, American Economic Association, vol. 86(4), pages 689-702, September.
  27. Easley, David & Kiefer, Nicholas M, 1988. "Controlling a Stochastic Process with Unknown Parameters," Econometrica, Econometric Society, vol. 56(5), pages 1045-64, September.
  28. Anderson, T W & Taylor, John B, 1976. "Some Experimental Results on the Statistical Properties of Least Squares Estimates in Control Problems," Econometrica, Econometric Society, vol. 44(6), pages 1289-1302, November.
  29. Karl-Heinz Todter & Gerhard Ziebarth, 1997. "Price Stability vs. Low Inflation in Germany: An Analysis of Costs and Benefits," NBER Working Papers 6170, National Bureau of Economic Research, Inc.
  30. Volker W. Wieland, 1996. "Learning by doing and the value of optimal experimentation," Finance and Economics Discussion Series 96-5, Board of Governors of the Federal Reserve System (U.S.).
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