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Optimal Monetary Policy Rules Under Persistent Shocks

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  • Bhattacharya, Joydeep
  • Singh, Rajesh

Abstract

The tug-o-war for supremacy between inflation targeting and monetary targeting is a classic yet timely topic in monetary economics. In this paper, we revisit this question within the context of a pure-exchange overlapping generations model of money where spatial separation and random relocation create an endogenous demand for money. We distinguish between shocks to real output and shocks to the real interest rate. Both shocks are assumed to follow AR(1) processes. Irrespective of the nature of shocks, the optimal inflation target is always positive. Under monetary targeting, shocks to endowment require negative money growth rates, while under shocks to real interest rates it may be either positive or negative depending on the elasticity of consumption substitution. Also, monetary targeting welfare-dominates inflation targeting but the gap between the two vanishes as the shock process approaches a random walk. In sharp contrast, for shocks to the real interest rate, we prove that monetary targeting and inflation targeting are welfare-equivalent only in the limit when the shocks become i.i.d.! The upshot is that persistence of the underlying fundamental uncertainty matters: depending on the nature of the shock, policy responses can either be more or less aggressive as persistence increases.

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Bibliographic Info

Paper provided by Iowa State University, Department of Economics in its series Staff General Research Papers with number 12863.

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Date of creation: 14 Jan 2008
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Publication status: Published in Journal of Economic Dynamics and Control, July 2010, vol. 34 no. 7, pp. 1277-1294
Handle: RePEc:isu:genres:12863

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Postal: Iowa State University, Dept. of Economics, 260 Heady Hall, Ames, IA 50011-1070
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Web page: http://www.econ.iastate.edu
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Related research

Keywords: overlapping generations; random relocation model; monetary targeting; inflation targeting; real shocks; persistence;

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Cited by:
  1. Kryvtsov, Oleksiy & Shukayev, Malik & Ueberfeldt, Alexander, 2011. "Optimal monetary policy under incomplete markets and aggregate uncertainty: A long-run perspective," Journal of Economic Dynamics and Control, Elsevier, vol. 35(7), pages 1045-1060, July.

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