, summary network parameters (e.g., the degree distribution or transitivity index); and (iii) empirical models of strategic … network formation admitting interdependencies in preferences. Current research challenges and open questions are also …

This paper presents and structurally estimates a model of endogenous network formation and legislative activity of … across legislators in terms of effort and success rate in passing specific legislation. We avoid taking the social structure … of Congress as exogenously given and instead embed it in a model of endogenous network formation useful for developing …

We study the relationships between corporate R&D and three components of public science: knowledge, human capital, and … established firms, which account for more than three-quarters of business R&D, is affected by scientific knowledge produced by … innovation in firms. However, inventions from universities and public research institutes substitute for corporate inventions and …

knowledge intensity of production to determine the geographic structure of multinationals' input sourcing as well as its …How large are spatial barriers to transferring knowledge? We analyze the international operations of multinational … firms to answer this fundamental question. In our model firms can transfer bits of knowledge to their foreign affiliates in …

The rate of regional growth of new knowledge in the field of nanotechnology, as measured by counts of articles and … stocks of recorded knowledge in all scientific fields, and the extent to which tacit knowledge in all fields flows between … patenting. The data provide further support for the cumulative advantage model of knowledge production, and for ongoing efforts …

Commercializing knowledge involves transfer from discovering scientists to those who will develop it commercially. New … opportunities if high. Hence new knowledge remains naturally excludable and appropriable. Team production allows more knowledge … capture of tacit, complex discoveries by firm scientists. A robust indicator of a firm's tacit knowledge capture (and strong …

linked fields. Our analysis uses 1.8 million U.S. patents and their citation properties to map the innovation network and its … strength. Past innovation network structures are calculated using citation patterns across technology classes during 1975 …-1994. The interaction of this pre-existing network structure with patent growth in upstream technology fields has strong …

Tech clusters like Silicon Valley play a central role for modern innovation, business competitiveness, and economic …

We study the optimal allocation of R&D resources in an endogenous growth model with an innovation network, through … more R&D toward key sectors that are upstream in the innovation network. Second, we extend to an open-economy setting and … unilaterally optimal R&D allocations across sectors. Third, we build the global innovation network based on over 30 million global …

It concludes by constructing a simple model in which knowledge flows slowly across national borders but moves easily … innovation. After identifying pervasive market failures in innovation, it explains why those associated with the Nordic model may … be particularly conducive to innovation, and demonstrates that, in general, the optimal policies of the leader should …