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Spatial simulation outcomes on the competition of cooperators and defectors (n = 40, movement rate = 0.3). Spreads of effect estimates are from bootstrapped linear regression of cooperator frequency on standardized clustering coefficients (Cij/s.d.(Cij)). The model predicts (R2) 0.86 of cooperator frequency and 0.62 of population density variations. (Online version in colour.)
