نموذج النفقة والإعتدال حسب كتابات الشيباني

To analyze the consumer utility, we use Shibani’s model that is based on three successive layers of earning/spending/utility. Based on the social solidarity, we show that the marginal earning depends on the first difference between the MPC of lower and upper social groups. According to the social welfare function, the permissible marginal utility is related to the faith interaction driving to an efficient transfer of purchasing capabilities to the targeted group. The optimal faithful behavior of wealthy group leads to an elasticity of marginal utility less than one. Besides, the belief holding produces hidden supports to the affluent consumer