| PatentsRDUS {pglm} | R Documentation |
Dynamic Relation Between Patents and R\&d
Description
yearly observations of 346 production units
number of observations : 3460
country : United States
economic topic : industrial economics
econometrics topic : count data
Usage
data(PatentsRDUS)Format
A dataframe containing :
- cusip
compustat's identifying number for the firm
- year
year
- ardssic
a two-digit code for the applied R&D industrial classification
- scisect
is the firm in the scientific sector ?
- capital72
book value of capital in 1972
- sumpat
the sum of patents applied for between 1972-1979
- rd
R&D spending during the year (in 1972 dollars)
- patents
the number of patents applied for during the year that were eventually granted
Source
Hall, Browyn, Zvi Griliches and Jerry Hausman (1986) “Patents and R and D: Is there a Lag?”, International Economic Review, 27, 265-283.
References
http://cameron.econ.ucdavis.edu/racd/racddata.html, chapter 9..