Noise is widely regarded as a residual category—the unexplained variance in a linear model or the random disturbance of a predictable pattern. Accordingly, formal models often impose the simplifying assumption that the world is noise-free and social dynamics are deterministic. Where noise...

In a recent paper (jasss.soc.surrey.ac.uk/12/4/11.html), Oliver Will contends that the effect of mobility on trust that we originally reported (2002) depends on \'an assumption that is most probably an unwilling, unintended, and unwanted implication of the code.\' When we experimented with...

Evolutionary game theory has been used to study the viability of cooperation in a predatory world. Although previous studies have helped to identify robust strategies, little is known about how success translates into the reproduction of cultural rules. Analogs of genetic replication may be...

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