Notes

      are calculated according to assumptions listed here All other figures are taken from US official statistics

1 Software = SIC 7371+7372  
2 No of firms all industry  
State_level_firms% 88.7%
Firms / state level firms % average from 1988 to 1994  
3 Small businesses  
Average of number of SBs / total number of firms, 88-95  
  99.72%
4 Software firms  
Follow change in software receipts  
5 Software SBs  
Average of 1993 and 1994 ratios of software SBs to all software firms  
  98.69%
6 Receipts 216%
Data taken from http://www.sba.gov/ADVO/stats/us88_95.html  
First year measured 1990 (1990 incomplete year)  
Earlier years use average of receipts over GDP from 1991 to 1995  
7 Small business receipts  
Based on small business receipts / over all receipts, modified by % of small businesses over all businesses  
Uses average of above over 88-95  
8 Software receipts  
1993-4 growth rate, modified by GDP growth rate in the year (averages around 12%)  
9 Software SB receipts  
Average of 1993 and 1994 ratios of software SB receipts to all software receipts  
  49.49%
10 Procurement  
FPDC data linearly extrapolated during intervening years  
11 Average growth  
Annual GDP growth divided by growth in number of companies  
Measures change in contribution per company to GDP  
12 Double counting  
A proportion of companies receiving FP in a given year also received it in the previous year  
Hence their success is already being reflected in the figures extrapolated from the previous year  
% of FP cos in a given year who receive FP in following year  
  21.60%
13 Additional growth constant resulting from FP (see main report for calculation)  
  8.62%