On Monopoly Welfare Gains, Scale Efficiency and the Costs of Decentralization

Inside the neoclassical framework a monopoly produces an unambiguous loss of social welfare. In this article some dynamic efficiency aspects of monopoly in connection with economies of scale are discussed. Two different cases of the costs of capacity expansion for a branch are compared: (1) the capacity expansion takes place with only one, multiplant, monopoly firm, (2) the capacity expansion takes place in a branch producing the same output but with two or more multiplant firms. It is argued that monopoly welfare gains are likely to arise for a centralized process of capacity expansion compared to a decentralized one.