• Our Facebook dataset, described in K. Lewis, J. Kaufman, M. Gonzalez, A. Wimmer, and N.A. Christakis, “Tastes, Ties, and Time: A New (Cultural, Multiplex, and Longitudinal) Social Network Dataset Using,” Social Networks 30(4): 330-342 (October 2008) may be available upon request.
  • Our HuDiNe dataset regarding our phenotypic disease network is described in C.A. Hidalgo, N. Blumm, A.L. Barabasi, and N.A. Christakis, “A Dynamic Network Approach for the Study of Human Phenotypes,” PLoS Computational Biology 5(4): e1000353. doi:10.1371/journal.pcbi.1000353 (April 2009) is available here.
  • The FHS-Net is available to qualified researchers. Given the origin of these data in clinical records and given the rules of the Framingham Heart Study, not all the data were releasable, however. In June, 2009, the study’s administrators, with our assistance, posted a version of these data in a secure online repository. FHS implemented a variety of changes to the data in order to help protect subject confidentiality before posting. Specifically: (1) all date information was changed to a monthly resolution rather than daily; (2) only 9,000 cases rather than 12,000 could be posted (e.g., all non-genetically related relative ties, such as adopted siblings, step-children, etc., were removed); (3) individuals who did not consent to the release of “sensitive information” were excluded; and (4) the available covariates (e.g., geographic coordinates) were restricted. We have re-run some of our analyses on this restricted dataset, and many (but not all) of our results survive these restrictions. This dataset is distributed via the SHARE database at dbGAP.
  • R code used to simulate the formation of violent groups in networks. Simulations assess effects of leader recruitment strategies, overall tendencies towards violence, and the deliberate placement of “saints” and “devils” in changing group behavior. Some of the networks and leadership used to run the simulations may be available on request.