Uncertainty shocks in a model of effective demand : comment
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Basu and Bundick, 2017 showed an intertemporal preference volatility shock has meaningful effects on real activity in a New Keynesian model with Epstein and Zin, 1991 preferences. We show that when the distributional weights on current and future utility in the Epstein–Zin time aggregator do not sum to 1, there is an asymptote in the responses to such a shock with unit intertemporal elasticity of substitution. In the Basu–Bundick model, the intertemporal elasticity of substitution is set near unity and the preference shock only hits current utility, so the sum of the weights differs from 1. We show that when we restrict the weights to sum to 1, the asymptote disappears and preference volatility shocks no longer have large effects. We examine several different calibrations and preferences as potential resolutions with varying degrees of success.
de Groot , O , Richter , A W & Throckmorton , N A 2018 , ' Uncertainty shocks in a model of effective demand : comment ' , Econometrica , vol. 86 , no. 4 , pp. 1513-1526 . https://doi.org/10.3982/ECTA15405
Copyright © 2018 The Econometric Society This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.3982/ECTA15405
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