title: What is a social tie?
authors.affiliation: Northwestern Institute on Complexity, Northwestern University, Evanston, IL 60201, USA. wuchtys@mail.nih.gov
authors.forename: Stefan
authors.initials: S
authors.lastname: Wuchty
mesh_terms: D003142:Communication; D003625:Data Collection / Q000379:methods*; D006801:Humans; D007398:Interpersonal Relations; D012919:Social Behavior