ECON 1010 Lecture Notes - Lecture 12: Perfect Competition, Marginal Revenue, Market Power

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17 Dec 2018

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The demand curve for an individual price-taking business in perfect competition is also a marginal revenue curve a horizontal line at the market price. In the market structure of perfect competition, each small, identical business is a price- taker. Because each business can sell as much output as it can produce at the market price, there is no need to lower price to sell more. Each business"s individual demand curve a horizontal line at the market price is also its marginal revenue curve. Because of diminishing marginal productivity, marginal costs increase as output increases, and the average total cost curve is u-shaped: a business"s total cost = Fixed costs do not change with quantity of output produced; include normal profits (compensation for a business owner"s time and money average profits in all industries) Variable costs change with changes in the quantity of output produced: total product total output labour produces when working with all fixed inputs.

Related Questions

Multiple choice qs on Perfect Competition - Qs College level 1 MIcreconomics

1. What is the correct interpretation of the perfectly competitive firm's supply curve?

It is the same as its average variable cost curve.

It is the same as its total variable cost curve.

It is the same as the portion of its marginal cost curve that lies above the average variable cost curve.

It is the same as the portion of its average variable cost curve that lies above the marginal cost curve.

2. What is the name of the type of market that is dominated by a few firms?

Oligopoly.

Monopolistic competition.

Monopoly.

Perfect competition.

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3. What is break-even output?

The output at which the total revenue just covers a firm's total fixed cost.

The output at which the total revenue just covers a firm's total variable cost.

The output at which the total revenue just covers a firm's fixed and variable costs including normal profits.

The output at which the firm is making zero normal profits.

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4. All of the following except one are considered to be the prerequisite elements for a market system to work effectively. Which is the exception?

Extensive specialization and trade.

Perfect competition.

Private ownership of productive resources.

A legal and social foundation

A balanced government budget

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5. What is the term for the price at which the firm makes only normal profits?

Shutdown price.

Break-even price.

Average price.

Economic price.

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6. Which of the following statements is true regarding the price in a perfectly competitive market?

Price equals average revenue but not marginal revenue.

Price equals marginal revenue but not average revenue.

Price is equal to neither the average nor the marginal revenue.

Price is equal to both the average and marginal revenue.

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7. What is the term for the extra revenue derived from the sale of one more unit?

Average revenue.

Marginal revenue.

Net revenue.

Total revenue.

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8. What is the term for the amount of revenue that will always equal the price of the product in a perfectly-competitive market?

Marginal price.

Net revenue.

Average revenue.

Total revenue.

Q1. Average total cost is equal to
a. AFC + AVC
b. AFC/total output
c. AFC/AVC
d. AVC/AFC

Q2. As output increases, the ATC
a. increases
b. decreases
c. remains constant
d. falls and then rises

Q3. Total profit is equal to
a. total revenue minus total cost
b. total revenue minus explicit cost
c. total revenue minus variable cost
d. total revenue minus marginal cost

Q4. Marginal cost crosses the
a. AVC curve at the highest point of the AVC curve
b. ATC curve at the lowest point of the ATC curve
c. AFC curve at the lowest point of the AFC curve
d. ATC curve at the highest point of the ATC curve

Q5. Wages paid are an example of an explicit cost of doing business.
a. true
b. false

Q6. Any revenue over and above total cost is labeled economic profit.
a. true
b. false

Q7. If the selling price of a product is $10, the average total cost is $8, and total sales are 5,000 units, the total profit will be
a. $5,000
b. $8,000
c. $10,000
d. $20,000

Q8. Whenever marginal revenue exceeds marginal cost,
a. profit declines if output increases
b. profit increases if output increases
c. losses increase if output increases
d. marginal revenue must be rising

Q9. Under perfectly competitive conditions, marginal revenue is
a. greater than average revenue
b. equal to average revenue
c. less than average revenue
d. equal to the average variable

Q10. A firm's break-even point occurs where
a. marginal revenue equals marginal cost
b. marginal revenue equals average variable cost
c. total revenue equals total cost
d. total revenue equals total variable cost

Q11. The addition to total output resulting from using one more unit of a productive resource is the
a. average product
b. marginal input
c. total product
d. marginal product

Q12. Unlike a firm in pure competition, a monopolist may be able to
a. block the entry of new firms into the industry
b. continue to earn economic profits in the long run
c. earn economic profits in the short run
d. both (a) and (b)

Q13. Producer surplus is the difference between the price the firm is willing to sell its goods and the price it actually receives.
a. true
b. false

Q14. In the long run, under conditions of perfect competition, market forces come into play to
a. enhance profits
b. increase demand
c. eliminate profits
d. separate MR and AR

Q15. Consumer surplus is the area above the demand curve and below the equilibrium price.
a. true
b. false

Q16. Under perfect competition, market price is determined by market demand and supply.
a. true
b. false

Q17. The more that firms advertise, the closer they get to perfect competition.
a. true
b. false

Q18. Perfect competition assumes that a producer is interested in maximizing profit.
a. true
b. false

Q19. In the long run, under conditions of perfect competition, the buyer will eventually be able to buy the product at a
a. price equal to the lowest point on the ATC curve past the optimal scale of operation
b. price below cost
c. price equal to the lowest point on the ATC curve at the optimal scale of operation
d. discount

Q20. The lowest possible ATC curve is attained at the optimal scale of output.
a. true
b. false

Homework help and study guide help, all multiple choice

A monopolist:

A) can sell as much as it wants at the chosen price because it is the only seller.

B) can increase the price only if it is willing to decrease the quantity sold.

C) can increase the price and the quantity sold at the same time.

D) is not restricted by the law of demand.

A monopolistically competitive firm:

A) produces where marginal revenue equals marginal cost and charges the price consumers are willing to pay as given by the demand curve.

B) produces where marginal cost equals average total cost and charges the price consumers are willing to pay as given by the demand curve.

C) chooses price and quantity based on where the marginal cost curve meets the demand curve.

D) chooses price and quantity based on where the average total cost curve meets the demand curve.

21) Oligopoly is A) like a monopoly because there are barriers to entry. B) like perfect competition because oligopoly firms all sell homogeneous goods. C) like monopolistic competition because oligopoly firms all sell differentiated goods D) like perfect competition because there are many firms in the industry
ECON 1102 (Microeconomics) Test 4 (043015)

In ________ market structure, a firm's output depends ________.

A) an oligopoly; only on its own marginal revenue and marginal cost curves

B) a monopolistically competitive; in part on its competitors' price and quantity decisions

C) an oligopoly; in part on its competitors' price and quantity decisions

D) a monopolistically competitive; only on its marginal revenue curve

ECON 1010 Lecture Notes - Lecture 12: Perfect Competition, Marginal Revenue, Market Power

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