Monopoly supply

Summary and Conclusions In the preceding sections, it is shown that a supply curve in the ordinary sense does exist and can be derived, which corresponds to a specified family of demand curves described by changes in a single parameter of demand. If the demand curve hasn parameters, an equal number of supply curves can be derived, one corresponding to each family of demand curves generated by variation in one of the parameters, holding the remainingn–1 constant. Since the demand curve family facing the perfectly competitive firm has the formP =a, there is only one supply curve in this case. Further, that supply curve does not involve demand parameters since the sole demand parameter,a, is eliminated in its derivation. In general, this is not the case and the marginal cost schedule will be insufficient to describe the supply relation for imperfectly competitive firms.In the teaching of graduate and undergraduate microeconomics, students often become confused by conflicting discussion suggesting that monopoly nopoly supply is meaningless, irrelevant, or a point. If there is only one demand curve, the equilibrium price-quantity supply will be one point regardless of whether monopoly or perfectly competitive firms are being considered. The broader definition of supply advocated here offers the pedagogic advantage of stressing the fundamental uniformity of the supply concept in the theory of the firm. With shifting demand, there is a meaningful supply relation in both the competitive and monopoly case.As indicated in Section III, this generalized definition of supply has strong implications for empirical work, showing that it is tractable to estimate monopoly supply relations as well as marginal cost curves in the monopoly case and thus opening the door to useful new empirical work.