NOTES: Small businesses are firms with <500 employees. Firms include those reporting no employees on their payroll. Firm is an entity that is either in a single location with no subsidiaries or branches or is topmost parent of a group of subsidiaries or branches. High-technology industries defined by Bureau of Labor Statistics on basis of employment intensity of technology-oriented occupations. Other consists of agriculture, mining, and utilities.

SOURCES: Census Bureau, Statistics of U.S. Businesses, http://www.census.gov/csd/susb/susb.htm; and Hecker DE. 2006. High-technology employment: A NAICS-based update. Monthly Labor Review 128(7):57–72, http://www.bls.gov/opub/mlr/2005/07/art6full.pdf, accessed 19 September 2007.

Science and Engineering Indicators 2008