Source(s): U.S. Department of Labor: Bureau of Labor Statistics


Handbook of Methods Establishment Survey – (http://www.bls.gov/opub/hom/pdf/homch2.pdf)

Frequently Asked Questions – (http://stats.bls.gov:80/cps/cps_faq.htm)

Effective with the June 6, 2003 release, all historical establishment survey data were reconstructed to reflect the switch from the Standard Industrial Classification (SIC) system to the North American Industry Classification System (NAICS).