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Title: Quantitative Easing

Author(s): Wei Cui and Vincent Sterk

Publication Date: November 2018

Keyword(s): HANK, Large-scale asset purchases and monetary policy

Programme Area(s): Monetary Economics and Fluctuations

Abstract: Abstract Is Quantitative Easing (QE) an effective substitute for conventional monetary policy? We study this question using a quantitative heterogeneous-agents model with nominal rigidities, as well as liquid and partially liquid wealth. The direct effect of QE on aggregate demand is determined by the difference in marginal propensities to consume out of the two types of wealth, which is large according to the model and empirical studies. A comparison of optimal QE and interest rate rules reveals that QE is indeed a very powerful instrument to anchor expectations and to stabilize output and inflation. However, QE interventions come with strong side effects on inequality, which can substantially lower social welfare. A very simple QE rule, which we refer to as Real Reserve Targeting, is approximately optimal from a welfare perspective when conventional policy is unavailable. We further estimate the model on U.S. data and find that QE interventions greatly mitigated the decline in output during the Great Recession.

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Bibliographic Reference

Cui, W and Sterk, V. 2018. 'Quantitative Easing'. London, Centre for Economic Policy Research. https://cepr.org/active/publications/discussion_papers/dp.php?dpno=13322