True, Microsoft in the 1990s had a dominant share of the software for computer operating systems, but in the total market for all computer software and services, including everything from games to scientific programs, the Microsoft share was only about 16% in 2000. Questions over how to define the market continue today. Supreme Court held that the broader market definition was more appropriate, and the case against DuPont was dismissed. In 1956, after years of legal appeals, the U.S. DuPont countered that even though it had a 75% market share in cellophane, it had less than a 20% share of the “flexible packaging materials,” which includes all other moisture-proof papers, films, and foils. In a famous 1947 case, the federal government accused the DuPont company of having a monopoly in the cellophane market, pointing out that DuPont produced 75% of the cellophane in the United States. The horizontal demand curve means that, from the viewpoint of the perfectly competitive firm, it could sell either a relatively low quantity like Ql or a relatively high quantity like Qh at the market price P.Ī monopoly is a firm that sells all or nearly all of the goods and services in a given market. The demand curve it perceives appears in Figure 1(a). However, because a monopoly faces no competition, its situation and its decision process will differ from that of a perfectly competitive firm.Ī perfectly competitive firm acts as a price taker. The pattern of costs for the monopoly can be analyzed within the same framework as the costs of a perfectly competitive firm-that is, by using total cost, fixed cost, variable cost, marginal cost, average cost, and average variable cost. How will this monopoly choose its profit-maximizing quantity of output, and what price will it charge? Profits for the monopolist, like any firm, will be equal to total revenues minus total costs. Determine the level of output the monopolist should supply and the price it should charge in order to maximize profitĭemand Curves Perceived by a Perfectly Competitive Firm and by a MonopolyĬonsider a monopoly firm, comfortably surrounded by barriers to entry so that it need not fear competition from other producers. ![]() ![]() Describe and calculate marginal revenue and marginal cost in a monopoly.Analyze total cost and total revenue curves for a monopolist.Describe how a demand curve for a monopoly differs from a demand curve for a perfectly competitive firm.
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