To see this, we pool employment change data from the SUSB from 2003 to 2006.
The national SUSB data are available at the six-digit NAICS level of aggregation.
The SUSB data report expansions and contractions by firm size, by measuring employment changes at the establishment level.
Data used in the creation of Lorenz curves (Panel A in Figures 15, 17, and 18) and mean firm size series (Figure 14, Panel A) were obtained through Enterprise Statistics and SUSB.
Although SUSB provides data similar to those found in ES, there are several important differences.
The utility of SUSB is further reduced by the switch to the NAICS classification system from the SIC system after 1997; it is difficult to compare sectors between systems, and, as with CBP, it was necessary to construct a composite service sector from several NAICS subsectors (see Table 4).
When firm quantities are required for a calculation, ES and SUSB are used.
12) SUSB is a firm-size data source created by the Bureau of the Census from County Business Patterns (an establishment data source) with funding from the Office of Advocacy.
20) Comparisons are made using 1996 SUSB data; however, the industry shares change little from year to year.