Agrawal, Ajay; Cockburn, Iain M; Galasso, Alberto; … - C.E.P.R. Discussion Papers - 2013
externalities and their impact on regional innovation. We examine MSA-level patent data during the period 1975-2000 and find that … innovation output is higher in regions where large and small firms coexist. The finding is robust to across-region as well as …