Now showing items 1-8 of 8

    • Are Mutualisms Maintained by Host Sanctions or Partner Fidelity Feedback? 

      Weyl, Eric Glen; Frederickson, Megan E.; Yu, Douglas W.; Pierce, Naomi Ellen (National Academy of Sciences, 2010)
      Although mutualisms are common in all ecological communities and have played key roles in the diversification of life, our current understanding of the evolution of cooperation applies mostly to social behavior within a ...
    • Direct Reciprocity on Graphs 

      Ohtsuki, Hisashi; Nowak, Martin A. (Elsevier, 2007)
      Direct reciprocity is a mechanism for the evolution of cooperation based on the idea of repeated encounters between the same two individuals. Here we examine direct reciprocity in structured populations, where individuals ...
    • Economic contract theory tests models of mutualism 

      Weyl, E; Frederickson, M. E.; Yu, D. W.; Pierce, Naomi E. (Proceedings of the National Academy of Sciences, 2010)
      Although mutualisms are common in all ecological communities and have played key roles in the diversification of life, our current understanding of the evolution of cooperation applies mostly to social behavior within a ...
    • Evolutionary Dynamics in Structured Populations 

      Nowak, Martin A.; Tarnita, Corina E.; Antal, Tibor (The Royal Society, 2010)
      Evolutionary dynamics shape the living world around us. At the centre of every evolutionary process is a population of reproducing individuals. The structure of that population affects evolutionary dynamics. The individuals ...
    • Improved Use of a Public Good Selects for the Evolution of Undifferentiated Multicellularity 

      Koschwanez, John H; Foster, Kevin R; Murray, Andrew W. (eLife Sciences Publications, Ltd, 2013)
      We do not know how or why multicellularity evolved. We used the budding yeast, Saccharomyces cerevisiae, to ask whether nutrients that must be digested extracellularly select for the evolution of undifferentiated ...
    • A Model of Genetic Variation in Human Social Networks 

      Fowler, James H.; Dawes, Christopher T.; Christakis, Nicholas Alexander (National Academy of Sciences, 2009)
      Social networks exhibit strikingly systematic patterns across a wide range of human contexts. While genetic variation accounts for a significant portion of the variation in many complex social behaviors, the heritability ...
    • Prosperity is Associated with Instability in Dynamical Networks 

      Cavaliere, Matteo; Sedwards, Sean; Tarnita, Corina Elena; Nowak, Martin A.; Csikász-Nagy, Attila (Elsevier, 2012)
      Social, biological and economic networks grow and decline with occasional fragmentation and re-formation, often explained in terms of external perturbations. We show that these phenomena can be a direct consequence of ...
    • Transforming the Dilemma 

      Taylor, Christine Jiayou; Nowak, Martin A. (Wiley-Blackwell, 2007)
      How does natural selection lead to cooperation between competing individuals? The Prisoner's Dilemma captures the essence of this problem. Two players can either cooperate or defect. The payoff for mutual cooperation, R, ...