Evolution of public cooperation with weighted and conditional strategies

In real systems, generous individuals who prefer to contribute can play more important roles on the public than selfish individuals. Inspired by this, a spatial public goods game with weighted and conditional strategies is proposed in this paper. In our model, a player's contribution behavior is mainly determined by the less cautious neighbors rather than those more cautious ones. The weight effect is adjusted by a non-negative parameter α. Our results show that the number of strategies increases with the weight parameter α for the low multiplication factor r. On the contrary, for the high multiplication factor r, the less cautious cooperators are more likely to appear in the system.