Types of ties when two types of individuals are present.
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Edges are directed and from rows to column. For example, tie type 2 includes the ties from more prosocial individuals to less prosocial ones. When our hypothesized form of assortment occurs, the number of tie type 1 should be more frequent than other types of ties.Types of ties when two types of individuals are present.
创建时间：
2015-12-03
