The evolutionary public goods game on scale-free networks with heterogeneous investment

The public goods game (PGG) is generally considered as a suitable paradigm to explain ubiquitous cooperative behavior. In this study, we investigated the evolutionary PGG on scale-free networks and studied the effect of individual heterogeneity by setting the cooperator xx an investment value correlated to its degree as Ix=N⋅kxβ/∑jkjβIx=N⋅kxβ/∑jkjβ, where kxkx is the degree of xx, jj runs over all players and ββ is a tunable parameter. It is shown that the cooperation level is remarkably promoted by negative values of ββ whereas it is highly depressed by positive values of ββ. Moreover, the effect of environmental noise has also been investigated. Our result may sharpen the understanding of cooperation induced by the individual diversity.