HETEROGENEOUS ASPIRATIONS PROMOTE COOPERATION IN THE PUBLIC GOODS GAME
We study the impact of heterogeneous aspirations on the spatial public goods game (PGG) in a square lattice. An aspiration parameter u is introduced to decide who will be more probably to become the potential strategy source in structured population. Individuals are divided into two groups A (u > 0) and B(u = 0) by fraction v and 1 - v. We study how u and v affect cooperation in the PGG. For low values of u, the cooperation level monotonously increases as v increases. However, for large values of u, there exist an intermediate v approximate to 0: 5 for which cooperation thrives best. The influence of noise is also investigated. We find that the highest threshold of phase transition is reached at the middle value of noise.
aspiration cooperation pgg