R: Patents, R&D and Technological Spillovers for a Panel of...
PatentsRD
R Documentation
Patents, R&D and Technological Spillovers for a Panel of Firms
Description
a panel of 181 observations from 1983 to 1991
number of observations : 1629
observation : production units
country : world
Usage
data(PatentsRD)
Format
A dataframe containing :
year
year
fi
firm's id
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&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.