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Robust Monetary Policy In A New Keynesian Model With Imperfect Interest Rate Pass-Through

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  • Gerke, Rafael
  • Hammermann, Felix

Abstract

We use robust control to study how a central bank in an economy with imperfect interest rate pass-through conducts monetary policy if it fears that its model could be misspecified. We find that, first, whether robust optimal monetary policy under commitment responds more cautiously or more aggressively depends crucially on the source of shock. Imperfect pass-through amplifies the robust policy. Second, if the central bank is concerned about uncertainty, it dampens volatility in the inflation rate preemptively but accepts higher volatility in the output gap and loan rate. However, for highly sticky loan rates, insurance against model misspecification becomes particularly pricy. Third, if the central bank fears uncertainty only in the IS equation or the loan rate equation, the robust policy shifts its concern for stabilization away from inflation.

Suggested Citation

  • Gerke, Rafael & Hammermann, Felix, 2016. "Robust Monetary Policy In A New Keynesian Model With Imperfect Interest Rate Pass-Through," Macroeconomic Dynamics, Cambridge University Press, vol. 20(6), pages 1504-1526, September.
    • Handle: RePEc:cup:macdyn:v:20:y:2016:i:06:p:1504-1526_00
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    Cited by:

    1. Kotb, Naira & Proaño Acosta, Christian, 2020. "Capital-constrained loan creation, stock markets and monetary policy in a behavioral new Keynesian model," BERG Working Paper Series 158, Bamberg University, Bamberg Economic Research Group.
    2. Hasui, Kohei, 2020. "A Note On Robust Monetary Policy And Non-Zero Trend Inflation," Macroeconomic Dynamics, Cambridge University Press, vol. 24(6), pages 1574-1594, September.
    3. Kohei Hasui, 2021. "How robustness can change the desirability of speed limit policy," Scottish Journal of Political Economy, Scottish Economic Society, vol. 68(5), pages 553-570, November.
    4. Hasui Kohei, 2021. "Trend Growth and Robust Monetary Policy," The B.E. Journal of Macroeconomics, De Gruyter, vol. 21(2), pages 449-472, June.
    5. Ida, Daisuke & Okano, Mitsuhiro, 2023. "Optimal monetary policy delegation in a small-open new Keynesian model with robust control," Economic Modelling, Elsevier, vol. 120(C).

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