| PatentsRD {pglm} | R Documentation |
Patents, R\&d and Technological Spillovers for a Panel of Firms
Description
annual observations of 181 firms from 1983 to 1991
number of observations : 1629
country : world
economic topic : producer behavior
econometrics topic : count data
Usage
data(PatentsRD)Format
A dataframe containing :
- firm
firm's id
- year
year
- sector
firm's main industry sector, one of aero (aerospace), chem (chemistry), comput (computer), drugs, elec (electricity), food, fuel (fuel and mining), glass, instr (instruments), machin (machinery), metals, other, paper, soft (software), motor (motor vehicules)
- geo
geographic area, one of eu (European Union), japan, usa, rotw (rest of the world)
- patent
numbers of European patent applications
- rdexp
log of R and D expenditures
- spil
log of spillovers
Source
Cincer, Michele (1997) “Patents, R \& D and technological spillovers at the firm level : some evidence from econometric count models for panel data”, Journal of Applied Econometrics, 12(3), may–june, 265–280.
References
Journal of Applied Econometrics data archive : http://qed.econ.queensu.ca/jae/.