More ties than we thought

The Fabric of Space: Intrinsic vs. Extrinsic Distance Relations

tart with ordinary Euclidean space. Be a realist about points, and about S distances between points. I ask: how are the points interwoven to form the fabric of space? Are there direct ties only between “neighboring points,” so that points at a distance are connected only indirectly through series of such direct ties? Or are there also direct ties between distant points, so that the fabric is re...

Empirical Models of Social Learning in a Large, Evolving Network

This paper advances theories of social learning through an empirical examination of how social networks change over time. Social networks are important for learning because they constrain individuals' access to information about the behaviors and cognitions of other people. Using data on a large social network of mobile device users over a one-month time period, we test three hypotheses: 1) att...

Use of Cohesive Ties in English as a Foreign Language Students’ Writing

This study aims to understand certain linguistic and semantic resources for the text construction, namely the constructs of cohesion, coherence. The analysis of cohesive ties was conducted on the writing samples of 40 subjects (20 most coherent and 20 least coherent) Iranian undergraduates of English. This prompted us to identify the dominant types of cohesive devices used in most coherent writ...

Social Networks and the Success of Market Intermediaries: Evidence From the U.S. Residential Real Estate Industry

Market intermediaries are usually thought of as bringing together buyers and sellers. However, intermediaries may also connect these principals with other professionals who can provide assistance with and support for the transaction. We address the question of which set of ties—to buyers and sellers or to other professionals—are more important to the success of market intermediaries, using data...

Female cleaner fish cooperate more with unfamiliar males

Joint group membership is of major importance for cooperation in humans, and close ties or familiarity with a partner are also thought to promote cooperation in other animals. Here, we present the opposite pattern: female cleaner fish, Labroides dimidiatus, behave more cooperatively (by feeding more against their preference) when paired with an unfamiliar male rather than with their social part...

The dairy fat paradox: Whole dairy products may be healthier than we thought