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 …

Financial network structure is an important determinant of systemic risk. This paper examines how the U.S. interbank … network evolved over a long and important period that included two key events: the founding of the Federal Reserve and the …, initially reducing overall network concentration. The network became even more focused on Fed cities during the Depression, as …

, 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 …

I build a simple dynamic model of the formation of an international social network of importers and exporters. Firms … can only export into markets in which they have a contact. They acquire new contacts both at random, and via their network …

This paper presents and structurally estimates a model of endogenous network formation and legislative activity of … of Congress as exogenously given and instead embed it in a model of endogenous network formation useful for developing …

We develop a theoretical model of security investments in a network of interconnected agents. Network connections … strategic substitutes. In a general (non-symmetric) network, this implies that underinvestment by some agents will encourage … symmetric or locally tree-like. We also characterize the impact of network structure on equilibrium and optimal investments …

Should China build mega-cities or a network of linked middle-sized metropolises? Can Europe's mid-sized cities compete …: local returns to scale in innovation, the elasticity of housing supply, and the importance of local amenities. Even if there … are global increasing returns, the returns to local scale in innovation may be decreasing, and that makes networks more …

worked in technologies that were more central within the innovation network. We offer a new approach for measuring the … innovation network using patent data from Britain and France in the late-18th and early-19th century. We show that the network … innovation network, and the location of British inventors within it, explains an important share of the more rapid technological …