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Phys Rev Lett. 2006 Dec 22;97(25):258103. Epub 2006 Dec 19.

Coevolution of strategy and structure in complex networks with dynamical linking.

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Program for Evolutionary Dynamics, Harvard University, Cambridge, Massachusetts 02138, USA.


We introduce a model in which individuals differ in the rate at which they seek new interactions with others, making rational decisions modeled as general symmetric two-player games. Once a link between two individuals has formed, the productivity of this link is evaluated. Links can be broken off at different rates. We provide analytic results for the limiting cases where linking dynamics is much faster than evolutionary dynamics and vice versa, and show how the individual capacity of forming new links or severing inconvenient ones maps into the problem of strategy evolution in a well-mixed population under a different game. For intermediate ranges, we investigate numerically the detailed interplay determined by these two time scales and show that the scope of validity of the analytical results extends to a much wider ratio of time scales than expected.

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