How do the NAICS industry series compare to SIC series?
Two criteria were applied to determine if the new and old series were comparable. The first criterion is based on the overlap of employment between the two series. For example, a NAICS series is deemed comparable to the corresponding SIC series only if at least 90 percent of the employment in the NAICS classification is also in the SIC classification, and at least 90 percent of the employment in the SIC classification is also in the NAICS classification. A second test compared comparable access and participation estimates for NAICS and SIC. A series was considered continuous if 90 percent or more of the estimates were within 1 percentage point. All of the industry and occupational series that met the first overlap criteria also passed the second comparison test. Table 1 shows all of the NAICS industries that met the comparability tests with the previous SIC series. Table 1. Continuity of NCS Benefit Survey Industry series between the 2002 North American Industry Classification System (
