THE ANATOMY OF INDUSTRY RESEARCH-AND-DEVELOPMENT INTENSITY DISTRIBUTIONS

• 成果类型: Article
• 署名作者: COHEN, WM; KLEPPER, S
• 刊物名称: AMERICAN ECONOMIC REVIEW
• ISSN/ISSBN: 0002-8282
• 发表日期: 1992
• 页码: 773-799
• 关键词: N-ESTIMATORS; BINOMIAL-DISTRIBUTION; market-structure; INNOVATION; INVESTMENT; GROWTH

摘要

Using firm data disaggregated by industry, we establish a set of regularities in the distribution of firm R&D intensities within manufacturing industries. We show how a simple probabilistic process, in which chance influences a key unobserved determinant of R&D and firm size conditions the returns to R&D, can account for these regularities and other features of the distributions. The model provides a unified, noncausal explanation of a series of long-observed relationships across mean R&D intensity, market concentration, and the coefficient of variation. It also offers a novel explanation for the inverse relationship between R&D productivity and firm size.