Easy subway access predicts the resilience of New Yorkers' friendships

In Social Connectedness in Urban Areas (Sci-Hub mirror), a group of business and public policy researchers from Facebook, NYU and Princeton study anonymized, fine-grained location data from Facebook users who did not disable their location history, and find that the likelihood that New Yorkers will remain friends is well correlated with the ease of commuting between their respective homes on public transit. Read the rest