This term adds one network statistic to the model for
each element in k . The \(i\) th such statistic counts the number of
distinct k[i] -stars whose center node is in the second mode of the
network. The second mode of a bipartite network object is sometimes known as
the "event" mode. A \(k\) -star is defined to be a center node \(N\) and
a set of \(k\) different nodes \(\{O_1, \dots, O_k\}\) such that the
ties \(\{N, O_i\}\) exist for \(i=1, \dots, k\) . This term can only be used for
undirected bipartite networks.
# binary: b2star(k, attr=NULL, levels=NULL)a vector of distinct integers
a vertex attribute specification; if attr is
specified, then the count is over the instances where all nodes
involved have the same value of the attribute. levels specified
which values of attr are included in the count. (See Specifying
Vertex attributes and Levels
(?nodal_attributes) for details.)
ergmTerm for index of model terms currently visible to the package.
ergm:::.formatTermKeywords("ergmTerm", "b2star", "subsection")