NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

A Theory of Macroprudential Policies in the Presence of Nominal Rigidities

Emmanuel Farhi, Iván Werning

NBER Working Paper No. 19313
Issued in August 2013
NBER Program(s):   EFG   ME

We provide a unifying foundation for macroprudential policies in financial markets for economies with nominal rigidities in goods and labor markets. Interventions are beneficial because of an aggregate demand externality. Ex post, the distribution of wealth across agents affect aggregate demand and the efficiency of equilibrium through Keynesian channels. However, ex ante, these effects are not privately internalized in the financial decisions agents make. We obtain a formula that characterizes the size and direction for optimal financial market interventions. We provide a number of applications of our general theory, including macroprudential policies guarding against deleveraging and liquidity traps, capital controls due to fixed exchange rates or liquidity traps and fiscal transfers within a currency union. Finally, we show how our results are also relevant for redistributive or social insurance policies, such as income taxes or unemployment benefits, allowing one to incorporate the macroeconomic benefits associated with these policies.

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This paper was revised on September 16, 2013

Acknowledgments

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Document Object Identifier (DOI): 10.3386/w19313

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