Volume 18, Issue 1, 1995

From the Publisher, 1-8
Calendar, 1-8
Announcements, 1-8
International Social Network Conference, 9-15
Network News, 9-15
Borgatti, Stephen P.
Ties and Bonds, 16-28
Wellman, Barry
Drug Abuse and HIV Prevention Research: Expanding Paradigms and Network Contributions to Risk Reduction, 29-45
II, Robert T. Trotter, Rothenberg, Richard B., Coyle, Susan
This paper identifies an important paradigm shift in social research on HIV transmission, drug abuse, and risk reduction research. The article describes the key research trends and the institutional support for social network analysis in the HIV and drug risk field for the past decade. Key hypotheses and recommended areas for future research are identified.
Lipstick, Needle, and Company: A Case Study of the Structure of a Bridge Group in Houston, Texas, 46-57
Elwood, William N.
Research regarding HIV transmission has been interested in the role of bridge groups, a venue for HIV transmission consisting of individuals grouped according to social roles that intersect at disparate populations, to which they may remain weakly linked. Bridge groups enable HIV transmission between separate types of risk groups, not simply between individuals, such as among gay men or among IDUs. For some time, researchers have speculated on the existence and function of bridge groups in the transmission of HIV between injection drug users to populations far removed from this targeted population. Despite various research efforts, we still know very little about such groups. Some research has surmised that gay male IDUs are a likely bridge group, as are male street prostitutes. This study examines bridge group members* perceptions of the realities of their social relations and HIV risk behaviors. The anecdotes that illustrate the functions of this bridge group are representative of all participants' stories. The core study participants are HIV-positive injection drug users who share needles with one another, but their links extend beyond drug use. All engage in risky, noncommercial sexual behaviors with one another and with individuals beyond the network. Some report that they engage in risky sexual behaviors with paying clients who are not part of the drug culture and who request these unsafe behaviors, often with the knowledge that the sex workers are seropositive. After a discussion of the findings, the manuscript discusses some bridge group characteristics to consider in future interventions and research, including rationales for avoiding safer sex practices, sexual segregation, and abuse histories.
An Investigation of the HIV Risk Behaviors of Drug Use Networks, 58-71
Williams, Mark L., II, Robert T. Trotter, Zhuo, Zhangqing, Siegal, Harvey A., Robles, Rafaela R., Jones, Adelbert
Truth or Dare?: Sexual Networks, Friendship Networks and Risk Behavior in an Informal Gay Group, 72-87
Johnson, Jeffrey C., Schade, Edie, Weller, Susan C.
Network Structure and Proxy Network Measures of HIV, Drug and Incarceration Risks for Active Drug Users, 88-103
II, Robert T. Trotter, Baldwin, Julie A., Bowen, Anne M.
Commentary: Sampling in Social Networks, 104-110
Rothenberg, Richard B.
In classic statistical theory, if a random sample is drawn from a population whose underlying distribution is known, it may be assumed that the properties of the sample mirror those of the population (Snedecor and Cochran, 1972). On that cornerstone is built a statistical superstructure that permits estimation, hypothesis testing, assurance of internal validity, generalizability, and modeling. For a variety of actual sampling schemes — simple random, stratified, probability proportional to size, systematic, cluster, multistage — considerable mathematical work has established appropriate point estimate and variance formulas, and has defined the potential for bias and other threats to validity (Levy and Lemeshow, 1980). This body of work provides satisfying precision for the estimation of uncertainty in defining population characteristics.
Techniques: Centrality and AIDS, 111-113
Borgatti, Stephen P.
Abstracts - Articles and Books, 114-134
Abstracts - Book Reviews, 134-141
Miscellaneous, 142-147

Volume 18, Issue 2, 1995

Full Issue, 1-99
Ties & Bonds, 9-14
Wellman,Barry,
A Note on the Ancestral Toronto Home of Social Network Analysis, 14-19
Freeman,Linton,C , Wellman,Barry,
The Meaning of Knowing as a Network Tie, 20-31
McCarty,Christopher,
Interorganizational Networks and the Changing Employment Contract, 32-49
Kalleberg,Arne,L , Knoke,David, , Marsden,Peter,V
Treating 2-Mode Data as a Network, 43-55
Borgatti,Stephen,P
Measuring Densities Based Upon Foci of Activity, 50-52
Feld,Scott,L
Article and Chapters, 56-73
Books, 74-93

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