This article explores the relationship between knowledge creation, entrepreneurship, and economic growth in the United States over the last 150 years. Distinguishing between general knowledge and economically useful knowledge, we examine the changes over time in the locus and content of new...

Compares Jaffe's work on the use of patents as a measure of the spillover of university research with the work of Acs and Audretsch in which innovation activity is measured by number of innovations. Jaffe's work, which modified the knowledge production function proposed by Griliches, showed a...

Probes the impact that various industry characteristics have on the innovative output of firms. Data used for this analysis were gathered by the U.S. Small Business Administration (SBA) through examination of over 100 technology, engineering, and trade journals. The SBA data on new products,...