What drives aggregate fluctuations? In order to test recent theories on the importance of macroeconomic and firm-level shocks, I estimate a dynamic factor model with firm-level data. Each time series, the sales growth of a specific firm, is decomposed in an unobserved common macroeconomic...

What drives aggregate fluctuations? I test the granular hypothesis, according to which the largest firms in the economy drive aggregate dynamics, by estimating a dynamic factor model with firm-level data and controlling for the propagation of firm-level shocks using a multi-firm growth model....