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. Author manuscript; available in PMC: 2012 Feb 29.
Published in final edited form as: J Theor Biol. 2010 Jun 9;265(4):624–632. doi: 10.1016/j.jtbi.2010.06.010

Figure 1.

Figure 1

Evolutionary stability under the z-mixed population model. The strategies that are ESS are indicated in each region of the (b, β) parameter space. We set c = 1 and α = 1. We consider small errors. (A) When anti-social punishment in not allowed, CP is ESS in regions 3, 4 and 5. (B) When anti-social punishment in allowed, CP is never ESS. Either DN or DS is the unique ESS.