Structural Cohesion and Embeddedness: A Hierarchical Concept of Social Groups
基于网络节点连通性提出结构凝聚的概念，将其定义为移除后会使群体断开的最小行动者数量，并通过层级嵌套定义嵌入性的结构维度，在两个不同实证场景中展示其应用。
Although questions about social cohesion lie at the core of our discipline, definitions are often vague and difficult to operationalize. Here, research on social cohesion and social embeddedness is linked by developing a concept of structural cohesion based on network node connectivity. Structural cohesion is defined as the minimum number of actors who, if removed from a group, would disconnect the group. A structural dimension of embeddedness can then be defined through the hierarchical nesting of these cohesive structures. The empirical applicability of nestedness is demonstrated in two dramatically different substantive settings, and additional theoretical implications with reference to a wide array of substantive fields are discussed.