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 EIGHT-FIRM CONCENTRATION RATIO: The proportion of total output in an industry that's produced by the eight largest firms in the industry. This is one of two common concentration ratios. The other is the four-firm concentration ratio. The eight-firm concentration ratio is commonly used to indicate the degree to which an industry is oligopolistic and how market control is held by the eight largest firms in the industry.

TOTAL REVENUE, MONOPOLY:

The revenue received by a monopoly firm for the sale of its output. Total revenue is one two bits of information a monopoly firm needs to calculate economic profit, the other is total cost. In general, total revenue is price times quantity--the price received for selling a good times the quantity of the good sold at that price. For a monopoly firm, that charges different prices for different quantities, total revenue increases then decreases. Two other revenue measures directly related to total revenue are average revenue and marginal revenue. Total revenue is often depicted as a total revenue curve.
Total revenue is important to the analysis a monopoly firm's short-run production decision. A monopoly firm generally seeks to produce the quantity of output that maximizes profit, which is the difference between total revenue and total cost.

Total revenue can be represented in a table or as a curve. For a monopoly firm, the total revenue curve is a "hump-shaped" curve the emerges from the origin, reaches a peak, then subsequently falls.

The total revenue received by a firm is price times quantity, often expressed as this simple equation:

 total revenue = price x quantity
For a monopoly firm that is a price maker rather than price taker, market control means the firm faces a negatively-sloped demand curve. As such, the price received is not fixed, but depends on the quantity of output sold.

Total Revenue,
Medicine Style
The table to the right summarizes the total revenue received by a hypothetical monopoly firm, Feet-First Pharmaceutical. This firm owns the patent to Amblathan-Plus, the only cure for the deadly foot ailment known as amblathanitis. As the only producer of Amblathan-Plus, Feet-First Pharmaceutical is a monopoly with extensive market control, facing a negatively-sloped demand curve. To sell a larger quantity of Amblathan-Plus, Feet-First Pharmaceutical must lower the price.

Consider a few tidbits of information about total revenue for a firm with market control.

• First, total revenue is zero if Feet-First Pharmaceutical sells no medicine. This makes sense. If nothing is sold, no revenue is received.

• Second, the price changes with the quantity of output sold. Feet-First Pharmaceutical can sell 1 ounce of medicine for \$10 per ounce. However, if it choses to sell 5 ounces, then it must lower the price to \$8 per ounce.

• Third, as Feet-First Pharmaceutical sells more medicine it receives more total revenue... UP TO A POINT. While total revenue received by Feet-First Pharmaceutical increases for the first 10 ounces sold, it declines for the 12th ounce.

• Fourth and last, the extra revenue generated for selling more medicine is not constant nor is it equal to the price. For example, the 5th ounce of medicine adds a extra \$6 of revenue even though the price is \$8.
Total Revenue Curve,
Medicine Style
The total revenue curve for a monopoly firm with market control is "humped shaped." The total revenue curve for Feet-First Pharmaceutical is displayed in the exhibit to the right. Key to this curve is that Feet-First Pharmaceutical is a monopoly provider of a drug called Amblathan-Plus and thus faces a negatively-sloped demand curve. Larger quantities of output are only possible with lower prices.

The vertical axis measures total revenue and the horizontal axis measures the quantity of output (ounces of medicine). Although quantity on this particular graph stops at 12 ounces of medicine, it could go higher.

This curve indicates that if Feet-First Pharmaceutical sells 1 ounce of medicine (at \$10 per ounce), then it receives \$10 of total revenue. Alternatively, if it sells 10 ounces (at \$5.50 per ounce), then it receives \$55 of total revenue. Should it sell 12 ounces (at \$4.50 per ounce), then it receives only \$54 of total revenue.

For Feet-First Pharmaceutical the total revenue "curve" actually is a "curve." The slope of this curve falls as more output is produced, eventually reaching a peak, then becoming negative. The changing slope of this curve is due to the changing price.

Although this total revenue curve, and preceding table of total revenue numbers, is based on the production activity of Feet-First Pharmaceutical, a well-known monopoly firm, it could also be for any firm with market control. Monopolistic competition and oligopoly firms that also face negatively-sloped demand curves generate comparable total revenue.

 <= TOTAL REVENUE, MONOPOLISTIC COMPETITION TOTAL REVENUE, PERFECT COMPETITION =>

Recommended Citation:

TOTAL REVENUE, MONOPOLY, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2024. [Accessed: June 24, 2024].

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