Evaluation Harberger social welfare cost in Iran

Assessment and evaluation of the welfare loss due to monopoly and determining the market structure are the majorand study issues in marketing processes.Traitssuch as lack of entry and exitrelease, information asymmetry and lack of products homogeneity are considered as the factors effective on monopoly which their existence can cause monopoly and eventually creating the lost welfare, in other words, there is a direct relation between the effective monopoly and welfare cost in the society and in proportion to deviation from competitive conditions, the social costs are imposed on the society due to distortion of competition. Harberger, for the first time tried to present a criterion for measuring the cost of monopoly welfare, and in his article entitled "Monopoly and Allocation of Resources," attempted to measure the social burden of monopoly activities.