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...

Contents: 1. Introduction / David B. Audretsch, Erik E. Lehmann and Albert N. Link -- 2. Schumpeterian growth regimes / Cristiano Antonelli -- 3. Measuring entrepreneurial impact through alumni impact surveys / Shiri Breznitz, Brendan Hills and Qiantao Zhang -- 4. Academic entrepreneurship:...