Optimal Constrained Interest-Rate Rules under Heterogeneous Expectations
No 04/2021, ECON WPS - Working Papers in Economic Theory and Policy from TU Wien, Institute of Statistics and Mathematical Methods in Economics, Economics Research Unit
This paper examines optimal monetary policy under heterogeneous expectations. To this end, we develop a stochastic New Keynesian model with a cost-push shock and coexistence of one-step-ahead rational and adaptive expectations in decentralized markets. On the one side, heterogeneous expectations imply an amplification mechanism that has many adverse consequences missing under the rational expectations paradigm. On the other side, even discretionary optimal monetary policy can manipulate expectations via a novel channel. We argue that the incorporation of heterogeneous expectations in both the design and implemen tation of discretionary optimal monetary policy to exploit this channel lowers macroeconomic volatility. We find that: (1.) surprisingly, a more hawkish policy can reduce losses due to volatility, but an overly hawkish policy does not; (2.) overestimating the share of rational expectations in the design and implementation of policy creates additional losses, while the underestimation does not; (3.) credible commitment eliminates or mitigates many of the ramifications of heterogeneous expectations.
Keywords: heterogeneous expectations; optimal monetary policy; policy design; policy implementation (search for similar items in EconPapers)
JEL-codes: D84 E52 (search for similar items in EconPapers)
New Economics Papers: this item is included in nep-cba, nep-dge, nep-mac, nep-mon and nep-ore
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Journal Article: Optimal constrained interest-rate rules under heterogeneous expectations (2021)
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Persistent link: https://EconPapers.repec.org/RePEc:zbw:tuweco:042021
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