Precautionary Saving and Aggregate Demand

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• M. Edouard Challe is a CNRS researcher and associate professor of Economics at Ecole Polytechnique
• Thursday 05 March 2015, 13:00-14:00
• Room W4.06 Judge Business School.

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How do fluctuations in households’ precautionary wealth contribute to the propagation of aggregate shocks? In this paper, we attempt to answer this question by formulating and estimating a tractable structural model of the business cycle with incomplete insurance against idiosyncratic risk, nominal frictions, and involuntary unemployment. Time-variations in precautionary wealth have two conflicting effects on output volatility: a stabilizing “aggregate supply” effect working through the supply of capital and potential output; and a destabilizing “aggregate demand effect” working through aggregate consumption and the output gap. We quantify these forces via a maximum-likelihood estimation of the structural parameters of the model, using as observables both aggregate and cross-sectional information (such as the extent of consumption insurance and the distributions of wealth and consumption across households). We find the impact of demand shocks on aggregates to be significantly altered by time-varying precautionary savings. Paper is available here

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