Investment Shocks and Business Cycles
48 Pages Posted: 11 Jun 2008
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Investment Shocks and Business Cycles
Investment Shocks and Business Cycles
Date Written: March 2008
Abstract
Shocks to the marginal efficiency of investment are the most important drivers of business cycle fluctuations in US output and hours. Moreover, these disturbances drive prices higher in expansions, like a textbook demand shock. We reach these conclusions by estimating a DSGE model with several shocks and frictions. We also find that neutral technology shocks are not negligible, but their share in the variance of output is only around 25 percent, and even lower for hours. Labour supply shocks explain a large fraction of the variation of hours at very low frequencies, but not over the business cycle. Finally, we show that imperfect competition and, to a lesser extent, technological frictions are the key to the transmission of investment shocks in the model.
Keywords: Bayesian, DSGE model, endogenous markups, imperfect competition
JEL Classification: C11, E30
Suggested Citation: Suggested Citation
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