Strong ties in a small world

Marco Van Der Leij, Sanjeev Goyal

Research output: Contribution to journalArticlepeer-review

Abstract

This paper examines the celebrated "strength of weak ties" theory of Granovetter (1973). We examine two hypotheses implied by the theory: one, for any three players with two links present, the probability of a third link being present is increasing in the strength of the two ties, and two, the removal of a weak tie breaks more shortest paths than the removal of a strong tie. This paper tests these hypotheses using data on co-authorship among economists. Our data supports the hypothesis of transitivity of strong ties, but it rejects the hypothesis that weak ties are more crucial than strong ties. We then propose an explanation for the strength of strong ties which builds on two properties of the network: one, significant inequality in the distribution of connections across individuals, and two, stronger ties among highly connected individuals.

Original languageEnglish (US)
Article number1
JournalReview of Network Economics
Volume10
Issue number2
DOIs
StatePublished - Jun 7 2011

Keywords

  • small world
  • social networks
  • Strong ties

ASJC Scopus subject areas

  • Economics and Econometrics

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