| patentsrd {camerondata} | R Documentation |
Patents and R&D
Description
Panel data on patents and R&D expenditures. The sample includes 346 firms with five years of data from 1975 to 1979 used by Hall, Griliches, and Hausman (1986).
Usage
patentsrd
Format
A data frame with 346 observations and 25 variables:
- cusip
Compustat's identifying number for the firm (Committee on Uniform Security Identification Procedures number).
- ardssic
A two-digit code for the applied R&D industrial classification.
- scisect
= 1 if firm is in the scientific sector.
- logk
log of the book value of capital in 1972.
- sumpat
sum of patents applied for between 1972-1979.
- logr70
log of R&D spending in 1970, in 1972 dollars.
- logr71
log of R&D spending in 1971, in 1972 dollars.
- logr72
log of R&D spending in 1972, in 1972 dollars.
- logr73
log of R&D spending in 1973, in 1972 dollars.
- logr74
log of R&D spending in 1974, in 1972 dollars.
- logr75
log of R&D spending in 1975, in 1972 dollars.
- logr76
log of R&D spending in 1976, in 1972 dollars.
- logr77
log of R&D spending in 1977, in 1972 dollars.
- logr78
log of R&D spending in 1978, in 1972 dollars.
- logr79
log of R&D spending in 1979, in 1972 dollars.
- pat70
number of patents applied in the year that were eventually granted (1970).
- pat71
number of patents applied in the year that were eventually granted (1971).
- pat72
number of patents applied in the year that were eventually granted (1972).
- pat73
number of patents applied in the year that were eventually granted (1973).
- pat74
number of patents applied in the year that were eventually granted (1974).
- pat75
number of patents applied in the year that were eventually granted (1975).
- pat76
number of patents applied in the year that were eventually granted (1976).
- pat77
number of patents applied in the year that were eventually granted (1977).
- pat78
number of patents applied in the year that were eventually granted (1978).
- pat79
number of patents applied in the year that were eventually granted (1979).
Section in Text
23.3 Nonlinear Panel Example: Patents and R&D, pp. 792-5
Source
http://cameron.econ.ucdavis.edu/mmabook/mmadata.html
References
Cameron, A. and Trivedi, P. (2005), "Microeconometrics: Methods and Applications," Cambridge University Press, New York.
Hall, B., Griliches, Z. and Hausman J. (1986), "Patents and R and D: Is There a Lag?," International Economic Review, 27, issue 2, p. 265-83.
Examples
summary(patentsrd)