TY  - JOUR
AU  - Cohen,Wesley M.
AU  - Levin,Richard C.
AU  - Mowery,David C.
TI  - Firm Size and R&D Intensity:  A Re-Examination
JF  - National Bureau of Economic Research Working Paper Series
VL  - No. 2205
PY  - 1987
Y2  - March 1987
UR  - http://www.nber.org/papers/w2205
L1  - http://www.nber.org/papers/w2205.pdf
N1  - Author contact info:
Wesley M. Cohen
The Fuqua School of Business
Duke University
Box 90120
Durham, NC 27708-0120
Tel: 919-451-9770
Fax: NA
E-Mail: wcohen@duke.edu

David C. Mowery
Walter A. Haas School of Business
Mail Code 1900
University of California, Berkeley
Berkeley, CA  94720-1900
Tel: 510/643-9992
Fax: 510/642-2826
E-Mail: mowery@haas.berkeley.edu
AB  - Using data from the Federal Trade Commission's Line of Business Program and survey measures of technological opportunity and appropriability conditions, this paper finds that overall firm size has a very small, statistically in- significant effect on business unit R & D intensity when either fixed industry effects or measured industry characteristics are taken into account. Business unit size has no effect on the R & D intensity of business units that perform R & D, but it affects the probability of conducting R & D. Business unit and firm size jointly explain less than one per cent of the variance in R & D intensity; industry effects explain nearly half the variance.
ER  -