Bloom, Nicholas; Schankerman, Mark; Van Reenen, John - 2007
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 … firm's position in technology space and product market space. Using panel data on U.S. firms between 1980 and 2001 we show …