This is just like the dsp term, except this term adds one network
statistic to the model for each element in d where the \(i\) th such
statistic equals the number of edges (rather than dyads) in the
network with exactly d[i] shared partners. This term can be used with
directed and undirected networks.
# binary: esp(d)a vector of distinct integers
ergmTerm for index of model terms currently visible to the package.
ergm:::.formatTermKeywords("ergmTerm", "esp", "subsection")