TY - BOOK ID - 136327891 TI - Firm Size and R&D Intensity : A Re-Examination AU - Cohen, Wesley M. AU - Levin, Richard C. AU - Mowery, David C. AU - National Bureau of Economic Research. PY - 1987 PB - Cambridge, Mass. National Bureau of Economic Research DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:136327891 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 -