Volume 20, Issue 1, 1997

Calendar, 1
Network News, 2
Borgatti, Stephen P.
Ties and Bonds, 3
Wellman, Barry
The Search for Social Physics, 16-34
Bernard, H. Russell, Killworth, Peter
Structural Holes: Unpacking Burt's Redundancy Measures, 35-38
Borgatti, Stephen P.
In Structural Holes, Ron Burt (1992; 1995) describes a set of new measures based on ego networks. One key set of measures is concerned with the notion of redundancy. The general meaning of redundancy is clear: a person's ego network has redundancy to the extent that her contacts are connected to each other as well. However, the exact definition of the measures is shrouded in mathematical equations which are ambiguous at best.(1)

The purpose of this short note is to clarify how to compute the redundancy measures. At the end, I also comment briefly on the relationship between these measures and other well-known measures, such as ego-network density and betweenness centrality.
Abstracts - Articles and Chapters, 39-53
Abstracts - Books, 54-55
Abstracts - Dissertations, 54-55
Abstracts - Conferences Sunbelt 1997, 78-85
Abstracts - Southern Sociological Society, 86
Index of Articles Connections Volumes 1-20, 87-96

Volume 20, Issue 2, 1997

Cover, 1
Calendar 1998, 1
Calendar 1999, 2
Network News: Changes in CONNECTIONS, 3
Borgatti, Stephen P.
An Analysis of Communication Networks Among Tampa Bay Economic Development Organizations, 13-22
Hagen, Guy, Killinger, Dennis K., Streeter, Richard B.
In 1995 a federally-sponsored agency in Tampa, Florida undertook an applied social network analysis study. This agency, the Technology Deployment Center, needed a study to assess the dozens of economic development organizations in the Tampa Bay area, each with their own missions, strategies, planning and information resources. Social network analysis was selected for its strength in assessing communication, relations, and cooperation, and inter-organizational environments. As a network study of inter-organizational communication, the study presents a snapshot of Tampa Bay area public organization networks in the rapidly changing field of urban economic development. The research also contributed to a master’s thesis.
The Small World of the University: A Classroom Exercise in the Study of Networks, 23-33
Stevenson, William B., Davidson, Barbara, Manev, Ivan, Walsh, Kate
A small world study is an easy way to introduce students to the challenges and rewards of network studies. Hypotheses about networks can be formulated and easily tested during the course of a term. Here, hypotheses about the communication patterns among undergraduates were tested by creating a small world study with an administrator as a target. Undergraduates were found to prefer to pass small world folders among their own class and did not pass folders to lower classes. Graduate students, faculty and staff were more closely connected to the administration as compared to undergraduate students, and freshmen were particularly isolated in communication networks. Women relied more on homophilous ties to pass folders compared to men, and both sexes relied on homophilous ties when passing folders across occupational boundaries.
A Dynamic Analysis of the Mexican Power Network, 34-55
Mendieta, Jorge Gil, Schmidt, Samuel, Castro, Jorge, Ruiz, Alejandro
We have undertaken the project to understand the configuration, function and role of the Mexican network of power. Previous studies have focused on the recruitment and education of Mexican political leaders and rulers (Camp 1980), the path of their political careers (Smith 1979), their technical skills (Centeno 1994), the creation of cliques (Camp 1990) and the development of networks as an instrument for delivering benefits to their constituents (González-Matinez, 1995). It is our objective here to examine the network's topology, function and centrality values.

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