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)

[Package camerondata version 1.0.0 Index]