Now showing items 1-4 of 4

    • Cooperative behavior cascades in human social networks 

      Fowler, J. H.; Christakis, N (Proceedings of the National Academy of Sciences, 2010)
      Theoretical models suggest that social networks influence the evolution of cooperation, but to date there have been few experimental studies. Observational data suggest that a wide variety of behaviors may spread in human ...
    • Egocentric Social Network Structure, Health, and Pro-Social Behaviors in a National Panel Study of Americans 

      O’Malley, A. James; Arbesman, Samuel; Steiger, Darby Miller; Fowler, James H.; Christakis, Nicholas Alexander (Public Library of Science, 2012)
      Using a population-based, panel survey, we study how egocentric social networks change over time, and the relationship between egocentric network properties and health and pro-social behaviors. We find that the number of ...
    • The Evolution of Homophily 

      Fu, Feng; Nowak, Martin A.; Christakis, Nicholas Alexander; Fowler, James H. (Nature Publishing Group, 2012)
      Biologists have devoted much attention to assortative mating or homogamy, the tendency for sexual species to mate with similar others. In contrast, there has been little theoretical work on the broader phenomenon of ...
    • Evolution of In-Group Favoritism 

      Fu, Feng; Tarnita, Corina Elena; Christakis, Nicholas Alexander; Wang, Long; Rand, David Gertler; Nowak, Martin A. (Nature Publishing Group, 2012)
      In-group favoritism is a central aspect of human behavior. People often help members of their own group more than members of other groups. Here we propose a mathematical framework for the evolution of in-group favoritism ...