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Breakthrough Inventions and Migrating Clusters of Innovation

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Author Info
William R. Kerr
Abstract

We investigate the speed at which clusters of invention for a technology migrate spatially following breakthrough inventions. We identify breakthrough inventions as the top one percent of US inventions for a technology during 1975-1984 in terms of subsequent citations. Patenting growth is significantly higher in cities and technologies where breakthrough inventions occur after 1984 relative to peer locations that do not experience breakthrough inventions. This growth differential in turn depends on the mobility of the technology's labor force, which we model through the extent that technologies depend upon immigrant scientists and engineers. Spatial adjustments are faster for technologies that depend heavily on immigrant inventors. The results qualitatively confirm the mechanism of industry migration proposed in models like Duranton (2007).

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 15443.

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Date of creation: Oct 2009
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Handle: RePEc:nbr:nberwo:15443

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Find related papers by JEL classification:
F2 - International Economics - - International Factor Movements and International Business
J4 - Labor and Demographic Economics - - Particular Labor Markets
J6 - Labor and Demographic Economics - - Mobility, Unemployment, and Vacancies
O3 - Economic Development, Technological Change, and Growth - - Technological Change
O4 - Economic Development, Technological Change, and Growth - - Economic Growth and Aggregate Productivity
R1 - Urban, Rural, and Regional Economics - - General Regional Economics
R3 - Urban, Rural, and Regional Economics - - Production Analysis and Firm Location

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This page was last updated on 2009-11-25.

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