R & D and sales, chemical industry.
data("rdchem")
A data frame with 32 observations.
R&D spending, millions $
firm sales, millions $
profits, millions $
Jeffrey M. Wooldrige (2006): Introductory Econometrics: A Modern Approach, 3rd ed., Thomson South-Western.
From Businessweek R&D Scoreboard, October 25, 1991
It would be interesting to collect more recent data and see whether the R&D/firm size relationship has changed over time.