The interaction of monetary and macroprudential policies

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Title: The interaction of monetary and macroprudential policies
Author: Silvo, Aino
Series: Journal of Money, Credit and Banking
Series volume: 51
Series number: 4 ; June
Year of publication: 2019
Publication date: 17.6.2019
Published in: Published in Bank of Finland Research Discussion Papers 1/2016.
Page range: 859-894
Subject (yso): rahapolitiikka; luotot
Keywords: makrovakauspolitiikka; makrovakaus
JEL: E32; E44; E52; G28
Other keywords: monetary policy; macroprudential policy; credit cycles
Abstract: I analyze a New Keynesian dynamic stochastic general equilibrium (DSGE) model where the financing of productive investment is affected by a moral hazard problem. I solve for jointly Ramsey‐optimal monetary and macroprudential policies. I find that when a financial friction is present in addition to the standard nominal friction, the optimal policy can replicate the first‐best allocation if the social planner can conduct both monetary and macroprudential policy. Using monetary policy alone is not enough: a policy trade‐off between stabilizing inflation and output gap emerges. When policy follows simple rules, the source of fluctuations is relevant for the choice of the appropriate policy mix.

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