Zucker, Lynne G.; Darby, Michael R.; Brewer, Marilynn B. - 2021
.S. biotechnology enterprises during 1976-1989. Using a linked cross-section/time- series panel data set, we find that the timing and … intellectual capital is related to knowledge spillovers, but in this case 'natural excludability' permits capture of supranormal … structures. We believe biotechnology may be prototypical of the birth patterns in other innovative industries …