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

Usage

data(PatsRD)

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.

Results