Please use this identifier to cite or link to this item: http://hdl.handle.net/10419/27741
Authors: 
Bachmann, Ruediger
Bayer, Christian
Year of Publication: 
2009
Series/Report no.: 
Discussion Paper Series 1: Economic Studies 2009,15
Abstract: 
Is time-varying firm-level uncertainty a major cause or amplifier of the business cycle? This paper investigates this question in the context of a heterogeneousfirm RBC model with persistent firm-level productivity shocks and lumpy capital adjustment, where cyclical changes in uncertainty correspond naturally to cyclical changes in the cross-sectional dispersion of firm-specific Solow residual innovations. We use a unique German firm-level data set to investigate the extent to which firm-level uncertainty varies over the cycle. This allows us to put empirical discipline on our numerical simulations. We find that, while firm-level uncertainty is indeed countercyclical, it does not fluctuate enough to significantly alter the dynamics of an RBC model with only first moment shocks. The mild changes we do find are mainly caused by a bad news effect: higher uncertainty today predicts lower aggregate Solow residuals tomorrow. This effect dominates the real option value effect of time-varying uncertainty, highlighted in the literature.
Subjects: 
Ss model
RBC model
lumpy investment
countercyclical risk
aggregate shocks
idiosyncratic shocks
heterogeneous firms
news shocks
uncertainty shocks.
JEL: 
E20
E22
E30
E32
Document Type: 
Working Paper

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