PatsRD: Dynamic Relation Between Patents and R\&D
Description
a panel of 346 observations from 1970 to 1979 number of observations : 3460
observation : production units
country : United States
Format
A dataframe containing :
- cusip
- Compustat's identifying number for the firm (Committee
on Uniform Security Identification Procedures number)
- year
- year
- ardsic
- a two-digit code for the applied R&D industrial
classification (roughly that in Bound, Cummins, Griliches, Hall, and
Jaffe, in the Griliches R&D, Patents, and Productivityvolume)
- scisect
- is the firm in the scientific sector ?
- logk
- the logarithm of the book value of capital in 1972.
- sumpat
- the sum of patents applied for between 1972-1979.
- logr
- the logarithm of R&D spending during the year (in 1972 dollars)
- pat
- the number of patents applied for during the year that
were eventually granted
Source
Hall, Bronwyn , Zvi Griliches and Jerry Hausman (1986) “Patents
and R&D: Is There a Lag?”, International Economic Review,
27, 265-283.References
Cameron, A.C. and Trivedi P.K. (1998) Regression analysis of
count data, Cambridge University Press,
http://cameron.econ.ucdavis.edu/racd/racddata.html, chapter 9.Cameron, A.C. and P.K. Trivedi (2005) Microeconometrics :
methods and applications, Cambridge, pp. 792--5.