SI 301 Chapter Notes - Chapter 4: Bipartite Graph, Aka People, Homophily
Document Summary
Networks in their surrounding contexts: homophily. Concept that we are similar to our friends. Looking at networks allows us to look at dominant features of overall structure. Homophily states that b and c are likely to be similar to a in many ways. High chance that b-c friendship will form. True even if neither is aware that the other knows a. A network with no homophily would have friendships are formed as though there were random mixing across a given characteristic. If the fraction of cross-gender edges is significantly less than 2pq, then there is evidence for homophily. Connects two nodes that are different according to the characteristic in question: mechanisms underlying homophily: selection and social influence. Tendency of people to form friendships with others with similar characteristics. Assess whether people adapt their behaviors to be more like their friends or find people like them: longitudinal studies allow to track edges and behaviors over a period of time, affiliation.
