Research On Group Cooperation Behavior Based On Asymmetric Game

Asymmetric games in which game subjects are heterogeneous in different dimensions are more in line with the real world.Therefore,it has extraordinary practical significance and research value to explore the micro-mechanism of the evolution of group cooperative behavior of asymmetric game subjects,which can help to understand and solve social dilemmas.Evolutionary game theory,as a theoretical method for finite rational individuals to achieve evolutionary stability strategies through repeated game adaptive learning,provides strong support for the study of group cooperative behavior decision-making.This thesis uses evolutionary game theory,combined with complex network model and classical public goods game model,to construct two different game models of individual asymmetric properties and morality,respectively,and to explore the micro game dynamics of the emergence and maintenance of group cooperative behavior.The first part of this thesis considers the asymmetric game model of individual attribute inequality,first introducing heterogeneous individual endowments and productivity into the public goods game model,and then introducing heterogeneous coefficients to change the dependence of heterogeneous individual endowments and productivity,the study shows that unlike the previous results of individual inequality hindering cooperation and destroying welfare,aligning unequal endowments and productivity relationships can effectively promote the emergence and maintenance of group cooperative behavior,and when the degree of alignment is greater,the promotion effect will be stronger.It was found that highly contributing individuals play an important role in groups,and low-contributory participants form close-knit clusters around them to resist the exploitation of betrayers,and then gradually spread throughout the network system.In the second part,this thesis proposes an asymmetric game model of individual moral heterogeneity,and investigates the impact of moral asymmetry on group behavior from two aspects.Firstly,a moral asymmetric model based on personal norms is proposed.Individuals have the heterogeneity appropriateness rating of the set of available behaviors and the degree of concern for the behavior.The research shows that the higher the average moral level of the group,the stronger the promotion effect of personal norms on the emergence and maintenance of group cooperative behavior.Specifically,high moral individuals at the boundary surround low moral individuals from exploitation,so as to maintain cluster cooperation.Then this thesis adds social norms based on the asymmetric model of personal norms and morality.Here we simply apply descriptive social norms,that is,what individuals actually choose to do.In the next game,participants have the preference to choose individual strategies with higher actual cooperation frequency.The research shows that the moral asymmetric model combined with social norms has a better promotion effect on group cooperation than the individual moral asymmetric model of personal norms.In the greater intensity of social dilemma,the overall cooperation rate of the system will be effectively improved.