ABSTRACT
*This paper is a revised, expanded version of a paper (Breiger, 1974) presented at the Mathematical Social Science Board Conference on Social Elites, Harvard University , October 1974, chaired by Mark S. Granovetter. Belver C. Griffith and Nicholas C. Mullins kindly supplied the data (Griffith et al., 1973; Miller, 1973) on which this study is based. For constructive criticism and advice I am indebted to Harrison C. White and Scott A. Boorm an, and also to George Bohrn stedt, Support for this Joseph E. Schwartz, and Christopher Winship. research was obtained from National Science Foundation Grant GS-2689 (Principal investigator: Harrison C. White).
