The paper presents an extended version of the consumer choice problem. Different from the standard model, prices are not fixed but arise from Walrasian interactions of total demand and a stylized supply function for each of the goods. Three different types of evolutionary algorithms are set up...

The (socio-)psychological concepts of individual aspiration for conformity and consistency are integrated into the rational-choice framework. By using this integrative approach it is shown that after a shock the aspiration for conformity results in an equilibrium which deviates from the homo...