Now showing items 1-20 of 60

    • Alone in the Crowd: The Structure and Spread of Loneliness in a Large Social Network 

      Cacioppo, John T.; Fowler, James H.; Christakis, Nicholas Alexander (American Psychological Association, 2009)
      The discrepancy between an individual’s loneliness and the number of connections in a social network is well documented, yet little is known about the placement of loneliness within, or the spread of loneliness through, ...
    • “Are You at Peace?” 

      Steinhauser, Karen E.; Voils, Corrine I.; Clipp, Elizabeth C.; Bosworth, Hayden B.; Christakis, N; Tulsky, James Aaron (American Medical Association (AMA), 2006)
      Background Physicians may question their role in probing patients’ spiritual distress and the practicality of addressing such issues in the time-limited clinical encounter. Yet, patients’ spirituality often influences ...
    • Association Between Widowhood and Risk of Diagnosis With a Sexually Transmitted Infection in Older Adults 

      Smith, Kirsten P.; Christakis, Nicholas (American Public Health Association, 2009)
      Objectives. We assessed whether widowhood is associated with risk of diagnosis with a sexually transmitted infection (STI) among older adults in the United States and whether the associations observed in men differed before ...
    • Associations of Environmental Factors With Elderly Health and Mortality in China 

      Zeng, Yi; Gu, Danan; Purser, Jama; Hoenig, Helen; Christakis, Nicholas (American Public Health Association, 2010)
      Objectives. We examined the effects of community socioeconomic conditions, air pollution, and the physical environment on elderly health and survival in China. Methods. We analyzed data from a nationally representative ...
    • Attitude and Self-reported Practice Regarding Prognostication in a National Sample of Internists 

      Christakis, Nicholas; Iwashyna, Theodore J. (American Medical Association (AMA), 1998)
      Background Since prognostication appears increasingly important in clinical practice, especially in end-of-life care, we examined physicians' experiences and attitudes regarding it. Methods We mailed a survey to a ...
    • Cancer metastasis networks and the prediction of progression patterns 

      Chen, L L; Blumm, N; Christakis, N; Barabási, A-L; Deisboeck, Thomas Steve (Nature Publishing Group, 2009)
    • The Collective Dynamics of Smoking in a Large Social Network 

      Christakis, Nicholas; Fowler, James H. (Massachusetts Medical Society, 2008)
      Background: The prevalence of smoking has decreased substantially in the United States over the past 30 years. We examined the extent of the person-to-person spread of smoking behavior and the extent to which groups of ...
    • Complexities in Prognostication in Advanced Cancer 

      Lamont, Elizabeth Bernier; Christakis, Nicholas (American Medical Association (AMA), 2003)
      Predicting survival and disclosing the prediction to patients with advanced disease, particularly cancer, is among the most difficult tasks that physicians face. With the de-emphasis of prognosis in favor of diagnosis and ...
    • Computational Social Science 

      Lazer, David M.; Pentland, Alex; Adamic, Lada; Aral, Sinan; Barabási, Albert-László; Brewer, Devon; Christakis, Nicholas Alexander; Contractor, Noshir; Fowler, James; Gutmann, Myron; Jebara, Tony; King, Gary; Macy, Michael; Roy, Deb; Van Alstyne, Marshall (American Association for the Advancement of Science, 2009)
      A field is emerging that leverages the capacity to collect and analyze data at a scale that may reveal patterns of individual and group behaviors.
    • Conducting Social Network and Social Norm Research in Low-Resource Settings: Food Insecurity, Depression, and HIV Testing in Rural Uganda 

      Perkins, Jessica M. (2015-05-18)
      This dissertation examines the role of social networks and social norms in health outcomes and behaviors among low-and middle-income countries (LMICs), with a particular focus on Uganda. Paper 1 presents a systematic review ...
    • Cooperation, decision time, and culture: Online experiments with American and Indian participants 

      Nishi, Akihiro; Christakis, Nicholas; Rand, David G. (Public Library of Science (PLoS), 2017)
      Two separate bodies of work have examined whether culture affects cooperation in economic games and whether cooperative or non-cooperative decisions occur more quickly. Here, we connect this work by exploring the relationship ...
    • 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 ...
    • Detecting Emotional Contagion in Massive Social Networks 

      Coviello, Lorenzo; Sohn, Yunkyu; Kramer, Adam D. I.; Marlow, Cameron; Franceschetti, Massimo; Christakis, Nicholas; Fowler, James H. (Public Library of Science (PLoS), 2014)
      Happiness and other emotions spread between people in direct contact, but it is unclear whether massive online social networks also contribute to this spread. Here, we elaborate a novel method for measuring the contagion ...
    • Dueling biological and social contagions 

      Fu, Feng; Christakis, Nicholas; Fowler, James H. (Springer Nature, 2017)
      Numerous models explore how a wide variety of biological and social phenomena spread in social networks. However, these models implicitly assume that the spread of one phenomenon is not affected by the spread of another. ...
    • A Dynamic Network Approach for the Study of Human Phenotypes 

      Hidalgo, Cesar A; Blumm, Nicholas; Barabási, Albert-­‐László; Christakis, Nicholas Alexander (Public Library of Science, 2009)
      The use of networks to integrate different genetic, proteomic, and metabolic datasets has been proposed as a viable path toward elucidating the origins of specific diseases. Here we introduce a new phenotypic database ...
    • Dynamic Spread of Happiness in a Large Social Network: Longitudinal Analysis Over 20 Years in the Framingham Heart Study 

      Fowler, James H.; Christakis, Nicholas (British Medical Journal Publishing, 2008)
      Objectives: To evaluate whether happiness can spread from person to person and whether niches of happiness form within social networks. Design: Longitudinal social network analysis. Setting: Framingham Heart Study social ...
    • 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 ...
    • Emotions as infectious diseases in a large social network: the SISa model 

      Hill, Alison Lynn; Rand, David Gertler; Nowak, Martin A.; Christakis, N (The Royal Society, 2010)
      Human populations are arranged in social networks that determine interactions and influence the spread of diseases, behaviours and ideas. We evaluate the spread of long-term emotional states across a social network. We ...
    • Estimating Peer Effects on Health in Social Networks 

      Fowler, James H.; Christakis, Nicholas (Elsevier, 2008)
      We recently showed that obesity can spread socially from person to person in adults (Christakis and Fowler 2007). A natural question to ask is whether or not these results generalize to a population of adolescents. Three ...
    • 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 ...