Cassie McMillan
London E1W 1YW, UK
Portland, ME 04101
2nd floor
11th floor
Boston, MA 02115
2nd floor
London E1W 1LP, UK
Talk recording
Homophily, or the tendency for social contact to occur among those who are similar, plays a crucial role in structuring our social networks. However, empirical research almost always assumes that homophily is an unvarying process that operates similarly for all social ties, regardless of their level of intimacy or frequency of interaction. As data on weighted networks, or networks where ties are assigned quantitative measures of strength, become increasingly available, network researchers need to consider whether homophily processes operate differently for ties with varying weights. Here, I take this approach by first defining two variants of homophily that can arise in weighted networks: (1) strong tie homophily, or the tendency for ties with high values to cluster together similar peers, and (2) weak tie homophily, or the tendency for ties with low edge weights to connect same-attribute actors. Then, I apply valued ERGMs to demonstrate the utility of differentiating between the two variants across simulated and observed networks. In most networks, I find that there are observable differences in the magnitude of strong versus weak tie homophily. Additionally, when there are low levels of clustering on the attribute of interest, distinguishing between strong and weak tie homophily can reveal that these processes operate in opposite directions. Since strong and weak ties carry substantively different implications, I argue that differentiating between the two homophily variants has the potential to uncover novel insights on a variety of social processes.