Although the prospect of obtaining patent protection is believed to encourage R&D investments and thus the rate of inventive activity, there is little by way of direct evidence to support this belief. We use original data from the 1994 Carnegie Mellon survey on the appropriation of R&D in the US...

Applied economists and strategy scholars have examined a variety of firm-level factors that may explain the level and direction of firms' innovative effort and performance, including firms' profit incentives. Innovation at the firm level, however, should also depend heavily on the nature of the...

Based on a survey questionnaire administered to 1478 R&D labs in the U.S. manufacturing sector in 1994, we find that firms typically protect the profits due to invention with a range of mechanisms, including patents, secrecy, lead time advantages and the use of complementary marketing and...

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...

We study how the inventive capability of a firm conditions its participation in a division of innovative labor. Capable firms are, by definition, able to invent; for them, external inventions substitute for their own R&D. However, external knowledge is an input into internal invention, and thus,...