ECON101 Lecture Notes - Lecture 20: Marginal Cost, Competitive Equilibrium, Perfect Competition

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blushworm378

24 Jul 2019

School

University of Waterloo

Department

Economics

Course

ECON101

Professor

Predrag Rajsic

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ECON101 Full Course Notes

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Econ 101 lec 20 monopoly (part ii) Figure 12. 5 compares the price and quantity i n perfect competition and monopoly. The market demand curve, d, in perfect competition is the demand curve that the firm in monopoly faces. The market supply curve in perfect competition is the horizontal sum of the individual firms" marginal cost curves, s = mc. This curve is the monopoly"s marginal cost curve. Equilibrium occurs where the quantity demanded equals the quantity supplied at quantity. Equilibrium output, qm, occurs where marginal revenue equals marginal cost, mr = mc. Equilibrium price, pm, occurs on the demand curve at the profit-maximizing quantity. Compared to perfect competition, monopoly produces a smaller output and charges a higher price. Figure 12. 6(a) shows the efficiency of perfect competition. The market demand curve is t he marginal social benefit curve, msb. The market supply curve is the marginal social cost curve, msc. So competitive equilibrium is efficient: msb = msc.

Related Questions

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

QUESTION 22

For a perfectly competitive firm, profit maximization (or loss minimization) occurs at the level of output at which

	a.	MR = MC.
	b.	MR = AVC.
	c.	P = ATC.
	d.	MR = ATC.

4 points

QUESTION 23

If MR > MC, then

	a.	profits are being maximized.
	b.	the firm is producing too much of the good to be maximizing profits.
	c.	the firm can increase its profits (or minimize its losses) by increasing output.
	d.	the firm must be incurring losses.

4 points

QUESTION 24

If firms are earning zero economic profits, they must be producing at an output level at which

	a.	price minus marginal cost.
	b.	total revenue equals total costs, in other words, normal profits.
	c.	price equals average variable cost.
	d.	marginal revenue equals marginal cost.
	e.	none of the above

4 points

QUESTION 25

In the theory of perfect competition,

	a.	the market demand curve is horizontal.
	b.	the single firm faces a horizontal demand curve.
	c.	the single firm faces a downward-sloping demand curve.
	d.	the market demand curve is downward sloping.
	e.	b and d

azureshark954

21)

Compared to the results in a perfectly competitive market, a monopoly does which of the following?

	It charges a higher price.
	It charges a price greater than the marginal cost.
	It produces less output.
	All of the above
	None of the above

22)

"X-inefficiency" refers to the idea that

	government restrictions on competition create a monopoly, which results in inefficiency.
	the cost of rent-seeking activity should be added to the welfare cost of monopoly.
	Generation X is less efficient due to a lack of competitive spirit.
	a lack of competitive pressure results in a monopoly not keeping its costs down to the lowest possible level.
	price discrimination results in inefficiently low cross-elasticities of demand.

23)

Firms in which of the following market structures can engage in price discrimination?

	monopoly
	oligopoly
	monopolistic competition
	All of the above
	None of the above

24)

Monopolistic competition and perfect competition are in all of the following ways except

	Barriers to entry are low in both
	There are many firms in both
	Firms in both produce the output level where MR=MC
	Nonprice competition is important in both

25)

To get rid of excess capacity from the monopolistic competition in the long run, what would have to be given up?

	Free entry and exit.
	economic rent
	resource allocative efficiency
	differentiated product
	productive efficiency

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ECON101 Lecture Notes - Lecture 20: Marginal Cost, Competitive Equilibrium, Perfect Competition

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