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| PatentsRD   | R Documentation   |
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Patents, R\\&D and Technological Spillovers for a Panel of Firms
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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.

References
~~~~~~~~~~

Journal of Applied Econometrics data archive :
`http://jae.wiley.com/jae/ <http://jae.wiley.com/jae/>`_. Verbeek, Marno
(2004) *A guide to modern econometrics*, John Wiley and Sons,
`http://www.econ.kuleuven.ac.be/GME <http://www.econ.kuleuven.ac.be/GME>`_,
chapter 7.

See Also
~~~~~~~~

``Index.Source``, ``Index.Economics``, ``Index.Econometrics``,
``Index.Observations``,

``Index.Time.Series``
