View source for EvoLudoLab: 2x2 Game - Coexistence

{{EvoLudoLab:2x2|
options="--module 2x2 --run --delay 200 --view Strategies_-_Mean --timestep 0.5 --popsize 10000 --popupdate async --playerupdate imitate --geometry M --interactions all --references r1 --inittype frequencies 999,1 --paymatrix 1,0.38;1.62,0 --traitnames A,B --points 0.38"|
title=Type A and type B co-exist|
doc=Almost independently of the initial configuration, the population quickly converges to a mixed state where type <math>A</math> and <math>B</math> players co-exist.

In the context of cooperation, this scenario is captured by the Snowdrift Game, the Hawk-Dove Game or the Chicken Game: the best strategic option depends on the co-player - if he/she defects, it is better to cooperate but if he/she cooperates then defection pays off. Consequently, in a well-mixed population the rare type is always favored and hence cooperators and defectors co-exist in a stable equilibrium. Such interactions indicate another, slightly relaxed form of a social dilemma.

The above parameters are set to <math>R = 1, P = 0, T = 1.62</math> and <math>S = -0.38</math> with players imitating better strategies proportional to the payoff difference and an initial fraction of cooperators of 99.9% in a population of size 10'000.}}

[[Category: Christoph Hauert]]