  Limitation of resources has been recently introduced as a mechanism for the
survival and coexistence of cooperators with defectors in well-mixed
populations. Here we examine the same model on a scale-free network. A
prisoner's dilemma game on a scale-free network has shown coexistence of
cooperators and defectors for the entire range of parameters. Our results show
that by introducing the network to the limited resources model, the
cooperator-dominated region in the parameter space expands comparing to the
results of well-mixed population and the coexistence region becomes narrower.
The effect of scale-free network is therefore interpreted as improving the
cooperation in the population and reducing the coexistence.

Populations and Evolution;Adaptation and Self-Organizing Systems;Physics and Society