| rdchem | R Documentation |
Wooldridge Source: From Businessweek R&D Scoreboard, October 25, 1991. Data loads lazily.
data('rdchem')
A data.frame with 32 observations on 8 variables:
rd: R&D spending, millions
sales: firm sales, millions
profits: profits, millions
rdintens: rd as percent of sales
profmarg: profits as percent of sales
salessq: sales^2
lsales: log(sales)
lrd: log(rd)
It would be interesting to collect more recent data and see whether the R&D/firm size relationship has changed over time.
Used in Text: pages 64, 139-140, 159-160, 204, 218, 327-329, 339
https://www.cengage.com/cgi-wadsworth/course_products_wp.pl?fid=M20b&product_isbn_issn=9781111531041
str(rdchem)