U.S. Corporate R&D Volume I: Top 500 Firms in R&D by Industry Category
January 01, 1999
The report introduces the U.S. Corporate research and development (R&D) data series to provide new information and context on the R&D activity of the Nation’s top 500 R&D spending corporations. Data is based on the Standard and Poor’s Compustat database.
http://www.technology.gov/Reports/US_Corporate_R-D.pdf