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A Theory of Macroprudential Policies in the Presence of Nominal Rigidities

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  • Emmanuel Farhi
  • Ivan Werning

Abstract

We provide a unifying foundation for monetary policy and macroprudential policies in financial markets for economies with nominal rigidities in goods and labor markets and constraints on monetary policy such as the zero lower bound or fixed exchange rates. Macroprudential interventions in financial markets are beneficial because of an aggregate demand externality. Ex post, the distribution of wealth across agents affects aggregate demand and output through Keynesian channels. However, ex ante, these effects are not privately internalized in the financial decisions agents make. We obtain a simple formula that characterizes the size and direction for optimal financial market interventions as a function of a small number of empirically measurable sufficient statistics. We also characterize optimal monetary policy. We then show how to extend our framework to also incorporate financial markets frictions giving rise to pecuniary externalities. Finally, we provide a number of relevant concrete applications of our general theory.

Suggested Citation

  • Emmanuel Farhi & Ivan Werning, "undated". "A Theory of Macroprudential Policies in the Presence of Nominal Rigidities," Working Paper 95131, Harvard University OpenScholar.
  • Handle: RePEc:qsh:wpaper:95131
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    References listed on IDEAS

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    1. Jeremy C. Stein, 2012. "Monetary Policy as Financial Stability Regulation," The Quarterly Journal of Economics, Oxford University Press, vol. 127(1), pages 57-95.
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    More about this item

    JEL classification:

    • D5 - Microeconomics - - General Equilibrium and Disequilibrium
    • D6 - Microeconomics - - Welfare Economics
    • D62 - Microeconomics - - Welfare Economics - - - Externalities
    • E3 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles
    • E4 - Macroeconomics and Monetary Economics - - Money and Interest Rates
    • E5 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit
    • E58 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Central Banks and Their Policies

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