The Four-Equation New Keynesian Model
The Four-Equation New Keynesian Model
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四方程新凯恩斯模型
DOI:
10.1162/rest_a_01071
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发表时间:
2023
影响因子:
8
通讯作者:
Zhang, Ji
中科院分区:
文献类型:
--
作者:
Sims, Eric;Wu, Jing Cynthia;Zhang, Ji
This paper develops a New Keynesian model featuring financial intermediation, short- and long-term bonds, credit shocks, and scope for unconventional monetary policy. The log-linearized model reduces to four equations: Phillips and IS curves, as well as policy rules for the short-term interest rate and the central bank's long-bond portfolio (QE). Credit shocks and QE appear in both the IS and Phillips curves. In equilibrium, optimal monetary policy entails adjusting the short-term interest rate to offset natural rate shocks but using QE to offset credit market disruptions. Use of QE significantly mitigates the costs of a binding zero lower bound.
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