Fig. 4. Measures of homophily with respect to location for groups of coreviewed vacation rentals.

(A) Affinity, ratio, and normalized bias scores on a hypergraph where nodes are hotels, separated into to location classes (North America and Europe), and hyperedges are sets of hotels reviewed by the same user account on Tripadvisor (27). Results are comparable to our findings on political homophily in legislative bill cosponsorship. In each case, both classes have monotonic or nearly monotonic ratio scores (second row of plots) for groups where their class is in the majority. (B) MoHIs for both North America (NA) and Europe (Eu) are usually at the most extreme limits of what is combinatorially possible. The increasing MaHI shows that classes do tend to exhibit high affinities for groups where their class has a substantial majority, but this is not the case for groups where their class has only a slight majority.