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Robust monetary rules under unstructured model uncertainty

机译:非结构模型不确定性下的稳健货币规则

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This paper revisits a widely adopted approach to robust decision making developed by Hansen and Sargent (2003, 2008)-henceforth HS-and applies it to monetary policy design in the face of model uncertainty. We pay particular attention to two issues: first, we distinguish three possible forms of the implied game between malign nature and the policymaker in the HS procedure each leading to a different robust and approximating equilibria. Second, we impose the zero lower bound (ZLB) constraint on the nominal interest rate. We show that the ZLB constraint has serious consequences for a policymaker pursuing HS-type robustness, especially when accompanied by an inability to commit.
机译:本文回顾了由汉森和萨金特(Hansen and Sargent,2003,2008)(以下简称“ HS”)开发的稳健决策的一种广泛采用的方法,并将其应用于面对模型不确定性的货币政策设计。我们特别关注两个问题:首先,我们区分了HS程序中恶性性质和决策者之间隐含博弈的三种可能形式,每种形式都导致不同的稳健和近似平衡。其次,我们对名义利率施加零下限(ZLB)约束。我们显示ZLB约束对于追求HS型鲁棒性的决策者会产生严重后果,尤其是在伴随着无法承诺的情况下。

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