View source for EvoLudoLab: Space promotes cooperation in the Prisoner's Dilemma

{{EvoLudoLab:2x2|
options="--run --delay 200 --view 0 --reportfreq 1.0 --popsize 101x --popupdate r --playerupdate i --updateprob 1.0 --switchpref 0.0 --geometry n --intertype a1 --numinter 1 --reprotype a4 --initfreqs 2:8 --mutation 0.0 --basefit 1.0 --selection 1.0 --reward 1.0 --punishment 0.0 --temptation 1.07 --sucker -0.07"|
title=Spatial Prisoner's Dilemma: pure strategies|
doc=The spatial Prisoner's Dilemma supports cooperation within a certain parameter range. In that range cooperators can keep up with defectors by forming clusters and thus reducing interactions with (exploitation from) defectors. Even though the parameter range is rather limited, it still demonstrates that cooperation may persist simply because of spatial dimensions and without the need for sophisticated strategic behavior. Whereas in absence of spatial structures and limited local interactions cooperators would invariably go extinct.
The parameters are set to <math>T = 1.07</math> and <math>S = -0.07</math> with individuals arranged on a square <math>70\times 70</math> lattice with four neighbors and players imitating better strategies with a probability proportional to the payoff difference. The inital fraction of cooperators is 50%.}}

[[Category: Christoph Hauert]]