naics4 – 4-digit North American Industry Classification System (NAICS) code (longitudinally consistent 2017 NAICS codes) 

year – 4-digit year

sd – standard deviation

d7525 - difference between the 75th and 25th percentile of the within-industry distribution of the natural log of productivity in a given year

d9010 - difference between the 90th and 10th percentile of the within-industry distribution of the natural log of productivity in a given year

d1001 - difference between the 10th and 1st percentile of the within-industry distribution of the natural log of productivity in a given year

d9990 - difference between the 99th and 90th percentile of the within-industry distribution of the natural log of productivity in a given year

<variable name>* - asterisk indicates activity weighted dispersion measure (output per hour weighted by total hours; total factor productivity weighted by cost-share-based input index)

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