Large labs may spawn spin-outs caused by innovations deemed unrelated to the firm's overall business. Small labs generate demand for specialized services that lower entry costs for others. We develop a theoretical framework to study the interplay of these two localized externalities and their...

We report a puzzling pair of facts concerning the organization of science. The concentration of research output is declining at the department level but increasing at the individual level. For example, in evolutionary biology, over the period 1980 to 2000, the fraction of citation-weighted...

Audretsch D. B., Falck O., Feldman M. P. and Heblich S. Local entrepreneurship in context, Regional Studies. This paper posits that regions provide locational factors which determine the industry structure and with it entrepreneurial opportunities whose exploitation influences regional dynamics....

This paper combines the empirical finding of a functional specialization of cities with regional dynamics.We distinguish between cities dominated by headquarters and service firms (urban agglomerations), those with large stand-alone production plants in one sector (industrial agglomerations),...