In this paper we test the celebrated `Strength of weak ties' theory of Granovetter (1973). We test two hypotheses on the network structure in a data set of collaborating economists. While we find support for the hypothesis of transitivity of strong ties, we reject the hypothesis that weak ties...

This discussion paper led to a publication in the <A href="http://www.degruyter.com/view/j/rne.2011.10.2/rne.2011.10.2.1278/rne.2011.10.2.1278.xml">'Review of Network Economics'</A>, 2011, 10(2), 1-20.<P> In this paper we test the celebrated `Strength of weak ties' theory of Granovetter (1973). We test two hypotheses on the network structure in a data set of collaborating economists. While we find...</p></a>

This discussion paper has resulted in a publication in the <A href="http://aa4pq3kw5l.search.serialssolutions.com/directLink?&atitle=Economics%3A%20An%20Emerging%20Small%20World&author=Sanjeev%20Goyal%3B%20Marco%20J%20van%20der%20Leij%3B%20José%20Luis%20Moraga%2DGonzález&issn=00223808&title=The%20Journal%20of%20Political%20Economy&volume=114&issue=2&date=20060401&spage=403&id=doi:&sid=ProQ_ss&genre=article&lang=en">'Journal of Political Economy'</A>.<P>This paper examines the small world hypothesis. The first part of the paper presents empirical evidence on the evolution of a particular world: the world of journal publishing economists during the period...</p></a>

This paper examines the small world hypothesis. The first part of the paper presents empirical evidence on the evolution of a particular world: the world of journal publishing economists during the period 1970-2000. We find that in the 1970's the world of economics was a collection of islands....

In a Cournot oligopoly, prior to choosing quantity, each firm has an opportunity to form pair-wise collaborative links with other firms. These pair-wise links lower costs of production of the firms which form a link and, if there are knowledge spillovers, also lower costs of other firms which...

We consider a world in which individuals have private endowments and trade in markets while their utility is negatively affected by the consumption of their neighbors. Our interest is in understanding how the social structure of comparisons, taken together with the familiar fundamentals of the...

We develop a model of strategic networks that captures two distinctive features of interfirm collaboration: bilateral agreements and nonexclusive relationships. Our analysis highlights the relationship between market competition, firms' incentives to invest in R&D, and the architecture of...