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Superceded by 16-25. This working paper supersedes WP 12-22, WP 11-42, and WP 10-33. We employ a unique data set to examine the spatial clustering of private R&D labs, and, using patent citations data, we provide evidence of localized knowledge spillovers within these clusters. Jaffe,...
Persistent link: https://www.econbiz.de/10012937041
We employ a unique data set to examine the spatial clustering of private R&D labs, and, using patent citations data, we provide evidence of localized knowledge spillovers within these clusters. Jaffe, Trajtenberg, and Henderson (1993, hereafter JTH) provide an aggregate measure of the importance...
Persistent link: https://www.econbiz.de/10012937534
We examine the effects of urbanization and localization on four distinct types of innovation in manufacturing and … spatial sorting is important. A large portion of the regional differences in firm innovation rates is due to firm … localization on different types of innovation. However, once we include firm fixed effects and distinguish between manufacturing …
Persistent link: https://www.econbiz.de/10012304606
Building on the literature on agglomeration economies, this study examines how urbanization, industry-diversification, district economics and incubating initiatives are associated to the creation of innovative start-ups in Italy. The empirical analysis is based on a sample of 6,018 innovative...
Persistent link: https://www.econbiz.de/10012915936
This paper uses data from the Community Innovation Survey for Belgium to evaluate to what extent firms located in … control variables. Our findings show a positive impact of own-sector employment concentration on firm-level innovation output …
Persistent link: https://www.econbiz.de/10014186125
I study the effects of basic and applied innovation on a firm's market value and total factor productivity for a panel … of U.S. manufacturing firms. Basicness of innovation is measured by the index of generality proposed by Trajtenberg …, Henderson and Jaffe (1997), and basic and applied innovation stocks are proxied by the stocks of patents that score at the …
Persistent link: https://www.econbiz.de/10009732133
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Persistent link: https://www.econbiz.de/10012664872
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construct an endogenous growth model with spatial heterogeneity and agglomeration spillovers in innovation. Aggregate outcomes …
Persistent link: https://www.econbiz.de/10013308970