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The threshold of sT > 7 does not vary with population size, until the population size becomes low (n ~ 104), at which point drift becomes strong, and the standard deviation in the winning length (data not shown, but see Fig. 2 at http://www.mepalmer.net/supplementary/mbio/palmer-mbio-supp.pdf) becomes large. From top left to bottom right, n = 107, n = 106, n = 105, and n = 104.
