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. Author manuscript; available in PMC: 2013 Oct 21.
Published in final edited form as: J Theor Biol. 2012 Jul 16;311:28–39. doi: 10.1016/j.jtbi.2012.07.006

Figure 2.

Figure 2

The structure coefficient σ for the shift rule, as a function of the population size N, according to (6). A logarithmic scale is used for the horizontal axis. For N = 2 we have σ = 0. The value of σ exceeds one for N ≥ 6. Asymptotically, as N increases, σ increases as N/ln N.