segunda-feira, novembro 17, 2014

Mongo e a dispersão da produtividade

"Bloom et al. (2012) find rising volatility of plant-level TFP shocks in the U.S. manufacturing sector after 1990. Decker et al. (2014b) find that the intra-industry dispersion of plant-level total factor productivity rose, not fell, in the past quarter century."
"We undertake two types of exercises. First, we examine the evolution of the within-industry dispersion in (log) TFP. This is a proxy for the intensity of idiosyncratic shocks impacting establishments. Figure 17 shows the evolution of the within-industry 90-10 gap in productivity and the standard deviation of (log) TFP. Consistent with the literature  there is large dispersion in TFP across plants in the same industry.
...
Moreover, the evidence suggests that this dispersion is, if anything, rising over time. One concern might be that this measured dispersion is capturing permanent differences across plants.
Primeiro trecho retirado de "Labor Marlket Fluidity and Economic Performance"
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Segundo trecho retirado de "The Secular Decline in Business Dynamism in the U.S."

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