ABSTRACT
Two of the important tools that have been developed for measuring social capital are position-generated networks and affi liation networks of voluntary associations. Affi liation networks have long been formulated and analyzed as two-mode networks (conceived as linking, for example, persons and the organizations to which they belong). However, very few network researchers have noticed that the structure of position-generated networks could also be conceived as a form of two-mode network data. In this chapter, we employ a two-mode network formulation to map the classifi cation systems that underlie the processes by which actors categorize their social contacts into different occupational positions. In other words, we exploit the embedding of position-generated networks within a two-mode formulation. We therefore see the two-mode network formulation as, in certain respects, capable of unifying the study of position-generated networks (how actors classify their social contacts) and networks of voluntary associations (how actors choose different associations). The institutional logics of these classifi cation and affi liation systems indicate the collective and structural characteristics of social capital.
