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Monetary and macroprudential policy coordination among multiple equilibria

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  • Agur, Itai

Abstract

The notion of a tradeoff between output and financial stabilization is based on monetary-macroprudential models with unique equilibria. Using a game theory setup, this paper shows that multiple equilibria lead to qualitatively different results. Monetary and macroprudential authorities have tools that impose externalities on each other’s objectives. One of the tools (macroprudential) is coarse, while the other (monetary policy) is unconstrained. We find that this asymmetry always leads to multiple equilibria, and show that under economically relevant conditions the authorities prefer different equilibria. Giving the unconstrained authority a weight on “helping” the constrained authority (“leaning against the wind”) now has unexpected effects. The relation between this weight and the difficulty of coordinating is hump-shaped, and therefore a small degree of leaning worsens outcomes on both authorities’ objectives.

Suggested Citation

  • Agur, Itai, 2019. "Monetary and macroprudential policy coordination among multiple equilibria," Journal of International Money and Finance, Elsevier, vol. 96(C), pages 192-209.
  • Handle: RePEc:eee:jimfin:v:96:y:2019:i:c:p:192-209
    DOI: 10.1016/j.jimonfin.2019.05.007
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    Keywords

    Multiple objectives; Financial stability; Prudential regulation; Leaning against the wind;

    JEL classification:

    • C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
    • 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
    • G28 - Financial Economics - - Financial Institutions and Services - - - Government Policy and Regulation

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