Please use this identifier to cite or link to this item: http://hdl.handle.net/10419/162851
Authors: 
Darracq-Pariès, Matthieu
Kühl, Michael
Year of Publication: 
2017
Series/Report no.: 
Bundesbank Discussion Paper 22/2017
Abstract: 
We analyse the effects of central bank government bond purchases in an estimated DSGE model for the euro area. In the model, central bank asset purchases are relevant in so far as agency costs distort banks' asset allocation between loans and bonds, and households face transaction costs when trading government bonds. Such frictions in the banking sector induce inefficient time-variation in the term premia and allow for a credit channel of central bank government bond purchases. Considering ad hoc asset purchase programmes like the one implemented by the ECB, we show that their macroeconomic multipliers get stronger when the lower bound on the policy rate becomes binding and when the purchasing path is fully communicated and anticipated by the agents. From a more normative standpoint, interest rate policy and asset purchases feature strong strategic complementarities during both normal and crisis times. In an environment when nominal interest rates reach their effective lower bound, optimal monetary policy is to keep the policy rate low for a longer period in time and to engage in asset purchases. Our results also point to a clear sequencing of the exit strategy, first stopping the asset purchases and later raising the policy rate. In terms of macroeconomic stabilisation, optimal asset purchase strategies deliver sizeable benefits and have the potential to largely offset the costs of the lower bound on the policy rate.
Subjects: 
Zero Lower Bound
Optimal Monetary Policy
Banking
Quantitative Easing
DSGE
JEL: 
C61
E52
G11
ISBN: 
978-3-95729-383-1
Document Type: 
Working Paper

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