TY  - JOUR
AU  - Bloom,Nicholas
AU  - Schankerman,Mark
AU  - Reenen,John Van
TI  - Identifying Technology Spillovers and Product Market Rivalry
JF  - National Bureau of Economic Research Working Paper Series
VL  - No. 13060
PY  - 2007
Y2  - April 2007
UR  - http://www.nber.org/papers/w13060
L1  - http://www.nber.org/papers/w13060.pdf
N1  - Author contact info:
Nicholas Bloom
Stanford University
Department of Economics
579 Serra Mall
Stanford, CA 94305-6072
Tel: 650/725-3266
Fax: 650/725-5702
E-Mail: nbloom@stanford.edu

Mark Schankerman
Department of Economics, R.516
London School of Economics
Houghton Street
London WC2A 2AE
UK
Tel: 442079557518
E-Mail: M.Schankerman@lse.ac.uk

John Van Reenen
Department of Economics
London School of Economics
Centre for Economic Performance
Houghton Street
London WC2A 2AE
UNITED KINGDOM
Tel: 00 44 207/955-6976
Fax: 00 44 207/955-6848
E-Mail: j.vanreenen@lse.ac.uk
AB  - Support for R&D subsidies relies on empirical evidence that R&D "spills over" between firms. But firm performance is affected by two countervailing R&D spillovers: positive effects from technology spillovers and negative business stealing effects from R&D 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 then exploit these using distinct measures of a firm's position in technology space and product market space. Using panel data on U.S. firms between 1980 and 2001 we show that both technology and product market spillovers operate, but technology spillovers quantitatively dominate. The spillover effects are also present when we analyze three high tech sectors in finer detail. Using the model we evaluate the net spillovers from three alternative R&D subsidy policies.
ER  -