Cheng, Xiang; Ouyang, Qi - In: Physica A: Statistical Mechanics and its Applications 313 (2002) 3, pp. 683-694
The evolution of indirect reciprocity by images scoring proposed by Nowak and Sigmund is systematically studied with numerical simulations and theoretical analysis. Two different types of evolutionary stable societies, cooperative and defective, can be found in that model. Our study reveals...