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Identifying technology spillovers and product market rivalry

Bloom, Nick and Schankerman, Mark and Van Reenen, John (2005) Identifying technology spillovers and product market rivalry. CEPR discussion paper, 4912. Centre for Economic Policy Research, London, UK.

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Identification Number: 4912


Support for many R&D and technology policies relies on empirical evidence that R&D ‘spills over’ between firms. But there are two countervailing R&D spillovers: positive effects from technology spillovers and negative effects from business stealing by product market rivals. We develop a general framework showing that technology and product market spillovers have testable implications for a range of performance indicators, and exploit these using distinct measures of a firm’s position in technology space and product market space. We show using panel data on US firms between 1981 and 2001 that both technology and product market spillovers operate, but that net social returns are several times larger than private returns. The spillover effects are also revealed when we analyze three high-tech sectors in detail - pharmaceuticals, computer hardware and telecommunication equipment. Using the model we evaluate three R&D subsidy policies and show that the typical focus of support for small and medium firms may be misplaced.

Item Type: Monograph (Discussion Paper)
Official URL:
Additional Information: © 2005 Nicholas Bloom, Mark Schankerman, John Van Reenen
Subjects: T Technology > T Technology (General)
H Social Sciences > HB Economic Theory
H Social Sciences > HD Industries. Land use. Labor
Sets: Collections > Economists Online
Research centres and groups > Centre for Economic Performance (CEP)
Departments > Economics
Research centres and groups > Suntory and Toyota International Centres for Economics and Related Disciplines (STICERD)
Date Deposited: 27 May 2008 10:36
Last Modified: 12 Aug 2014 11:42

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