Figure 3. The average offer level p, acceptance level q, and the average payoff w of the population as functions of the degree k in a typical evolutionary process.
The population is structured by the scale-free networks. The degree-based role assignment regime is invoked to determine whoever acts as the proposer. The larger the α is, the more likely the individuals of larger degrees serve as the proposers. The individuals standing in the role of proposers averagely enjoy great advantage in accruing payoffs. However, low-degree individuals still offer fairly high fraction of the money to others, while high-degree individuals ruthlessly squeeze the low-degree individuals. Other parameter: m = 3, m0 = 3, the population size N = 1000, selection intensity β = 10, δ = 0.005.