Table 1.

Summary of critical benefit-to-cost ratios, (b/c)*, for the different models: a Moran process with death–birth update on a Delaunay triangulation and a hexagonal lattice; a Voronoi tessellation model. Results are shown for both the theory and simulations.

	theory	simulation
EGT model with DT (death–birth)	6.69	6.74
EGT model with HL (death–birth)	6.68	6.67
VT model (decoupled update)	2.78	2.83
VT model (death–birth)	—	7.26