We examine the long-run effect of homophily in online social networks on interpersonal interactions in local … communities. We measure online homophily across counties in the US using Facebook data. For identification, we exploit a conflict …

differences between groups, which in turn could lead selection pressures to vary across cultural groups. Separating the effects of … preferences related to fertility and mortality, the two basic components of genetic fitness. We specifically select six referenda … groups, in order to uphold its cultural values, has supported policies that could impose fitness costs on individuals in the …

Social networks are a key factor of success in life, but they are also strongly segmented on gender, ethnicity, and … other demographic characteristics (Jackson, 2010). We present novel evidence on an understudied source of homophily … about how these traits are related to social networks. Based on unique data collected using incentivized experiments on more …

differences in opinions by 40% of the standard deviation of opinion gap. The evidence is consistent with a homophily …

, connections increase over time, but homophily on gender and ethnicity is relatively constant across time, university residences … layers. Furthermore, we see assortativity in homophilous tendencies. There is weaker, albeit significant, homophily over …

We use aggregated data from Facebook to study the structure of social networks across European regions. Social …

of training they receive, which is often allocated on the basis of repeated selection. We analyze optimal selection … determinant for performance differentials within cohorts. We find that the optimal policy is pro-competitive at later selection … occur at early stages, where selection is either counter-competitive (i.e. individuals with low skill signals are selected …