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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Liljeros, Fredrik De Blasio, Birgitte Freiesleben Svensson, Ake |
| Spatial Coverage | Norway |
| Description | Author Affiliation: de Blasio BF ( Department of Biostatistics, Institute of Basic Medical Sciences, University of Oslo, POB 1122, Blindern, N-0317 Oslo, Norway.); |
| Abstract | Many social networks are characterized by a highly uneven distribution of links. The observed skewed distributions have in several cases been attributed to preferential attachment (PA), a tendency among nodes in a growing network to form new links preferentially to nodes with high numbers of links. We test the PA conjecture in sexual contact networks. A maximum likelihood estimation-based expectation-maximization fitting technique is used to model new partners over a 1-year period based on the number of partners in foregoing periods of 2 years, 4 years, and lifetime. The PA model is modified to account for individual heterogeneity in the inclination to find new partners and fitted to Norwegian survey data on heterosexual men and women. Results show evidence of nonrandom, sublinear PA when comparing the growth in 3- to 5-year periods. The potential implications of these findings are discussed. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 26 |
| Volume Number | 104 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2007-06-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Models, Statistical Sexual Behavior Psychology Sexual Partners Heterosexuality Likelihood Functions Norway Sex Factors Social Environment Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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