CHAPTER 13 Monopoly. Competition and Efficiency Allocative efficiency occurs when no resources are wasted. This means no individual can be made better

CHAPTER 13Monopoly

CHAPTER 13Monopoly

Competition and Efficiency Allocative efficiency occurs when no

resources are wasted. This means no individual can be

made better off without making someone else worse off.

In the absence of any obstacles, perfect competition leads to allocative efficiency.

Obstacles to Efficiency

The three main obstacles to achieving allocative efficiency are: Public goods (national defense) Externalities (external costs and

external benefits) Monopoly power

Obstacles to Efficiency

Public goods are those that can be consumed simultaneously by everyone and from which no one can be excluded.

Externalities occur when costs or benefits are conferred on other members of society.

Monopoly power is the absence of competition.

Public Goods

Public goods cannot be provided efficiently by the private market because of the free rider problem.

A free rider is someone who consumes a good without paying for it.

Because people can consume a public good without paying for it, no one has the incentive to pay for it.

Thus, the government has to provide the good and tax everyone to pay for it.

Externalities External costs are costs not borne by

the producer but borne by other members of society. Pollution imposes external costs.

External benefits are benefits accruing to people other than the buyer of a good. Education confers external benefits.

Some goods produce both external benefits and costs (e.g., public gardens)

Consequences of Externalities When there are external costs, such

as pollution, too much of the good is produced in the private market

When there are external benefits, such as from education, too little of the good is produced in the private market

In both cases, government intervention is warranted to induce less or more of the good to be produced.

Possible Government Actions to Deal With

Externalities In the case of external costs, tax the

private producer or directly restrict production.

In the case of external benefits, subsidize the producer or directly provide the good.

Monopoly

A monopoly is an industry that produces a good or service for which no close substitute exists and in which there is one supplier that is protected from competition by a barrier preventing the entry of new firms.

Examples of Monopoly Examples of monopolies include:

Local telephone service (Bell South) Water service (Metro-Dade) Cable television The U.S. Postal Service (regular mail) Local Electric Power (FPL) Microsoft (?) Google(?) Facebook (?) eBay (?)

Examples of “Monopoly”

No Close Substitutes

If there are close substitutes for a good or service, that means there is competition in the market.

Competition in the market means the market cannot be a monopoly by definition.

Innovation, Technological Change, and Substitutes

Innovation and technological change create new products, some of which are substitutes for existing products.

Example: FedEx, UPS, fax machines, and e-mail are substitutes for the services of the U.S. Postal Service, weakening their monopoly.

Example: Satellite TV is a substitute for Cable TV, weakening its monopoly.

Barriers to Entry Barriers to entry are legal or natural

impediments protecting a firm from competition from potential new entrants.

Barriers to entry include: Legal barriers Ownership barriers Natural barriers

Of course, firms can create illegal barriers to entry, but this would be a violation of the Sherman Antitrust Act.

Legal Barriers to Entry Legal barriers to entry create legal

monopoly. A legal monopoly is a market in

which competition and entry are restricted by the granting of a public franchise, license, patent or copyright, or in which a firm has legally acquired ownership of a significant portion of a key resource.

Legal Barriers: Public Franchises and Licenses

A public franchise is an exclusive right granted to a firm to supply a good or service. Example: U.S. Postal Service, Cable TV,

FPL A government license controls entry

into particular occupations, professions and industries. Example: licensing of medical doctors

and lawyers.

Legal Barriers: Patentsand Copyrights

A patent is an exclusive right granted to the inventor of a product or service. Patents are good for 20 years.

A copyright is an exclusive right granted to the author or composer of a literary, musical, dramatic, or artistic work.

Natural Barriers to Entry

Natural barriers to entry give rise to natural monopoly.

Natural monopoly occurs when one firm can supply the entire market at a lower price than two or more firms.

Demand must limit sales to a quantity at which economies of scale exist.

Natural Monopoly, Demand and Average Total Cost

The demand curve must intersect the industry ATC curve on a part of the ATC curve that is sloping downward.

If two or more firms supply the market, the per unit cost will be higher than will be the case if a single firm supplies the entire market.

5

10

15

Natural Monopoly

0 1 2 3 4

D = AR = P

Quantity (millions of kilowatt-hours)

Pri

ce (c

ents

per

kil

owat

t-ho

ur)

Quantity (millions of kilowatt-hours)

5

10

15

Natural Monopoly

0 1 2 3 4

D = AR = P

ATC

Pri

ce (c

ents

per

kil

owat

t-ho

ur)

Examples ofNatural Monopoly

Examples of natural monopoly usually involve economies of scale in distribution: Natural gas distribution systems Electric power distribution Trash collection Cable television Microsoft

Monopolies are Regulated Most monopolies are regulated in some

way by one or more government agencies. In the case of unregulated monopolies, the

government must either break up the monopoly or make some other change to promote competition and economic efficiency.

First, we study the operation of unregulated monopoly and how it differs from the operation of competitive markets.

Then we discuss pricing strategies for regulated monopolies.

Monopoly Price-Setting Strategies

Price discrimination is the practice of selling different units of a good or service for different prices. (ex. pizza, airlines)

A single-price monopoly is a firm that must sell each unit of its output for the same price. (ex. DeBeers)`

Single-Price Monopoly

The firm’s demand curve is the market demand curve.

Marginal revenue is not the same as the market price.

Single-Price Monopoly

Bobbie’s Barbershop, in Cairo, Nebraska is the sole supplier

of haircuts in town.

Let’s examine the market for haircuts in Cairo.

Quantity MarginalPrice demanded Total revenue(P) (Q) revenue(dollars per (haircuts (TR=P Q) (dollars

perhaircut) per hour) (dollars additional haircut)

)/( QTRMR

a 20 0 0

b 18 1 18

c 16 2 32

d 14 3 42

e 12 4 48

f 10 5 50

Demand and Marginal Revenue



)/( QTRMR

a 20 0 0 -

b 18 1 18

c 16 2 32

d 14 3 42

e 12 4 48

f 10 5 50




)/( QTRMR

a 20 0 0 -

b 18 1 18 18

c 16 2 32

d 14 3 42

e 12 4 48

f 10 5 50




)/( QTRMR

a 20 0 0 -

b 18 1 18 18

c 16 2 32 14

d 14 3 42

e 12 4 48

f 10 5 50




)/( QTRMR

a 20 0 0 -

b 18 1 18 18

c 16 2 32 14

d 14 3 42 10

e 12 4 48

f 10 5 50




)/( QTRMR

a 20 0 0 -

b 18 1 18 18

c 16 2 32 14

d 14 3 42 10

e 12 4 48 6

f 10 5 50




)/( QTRMR

a 20 0 0 -

b 18 1 18 18

c 16 2 32 14

d 14 3 42 10

e 12 4 48 6

f 10 5 50 2


Quantity (haircuts per hour)

Pri

ce &

mar

gin

al r

even

ue

(dol

lars

per

hai

rcut

)



Pri

ce &

mar

gin

al r

even

ue

(dol

lars

per

hai

rcut

)

DMR


20

16

14

DMR

cd

Total revenue loss $4

2 3Quantity (haircuts per hour)

Pri

ce &

mar

gin

al r

even

ue

(dol

lars

per

hai

rcut

)


Price falls from $16 to $14

Quantity rises from2 to 3

20

16

14

DMR

cd


Total revenue gain $14


Pri

ce &

mar

gin

al r

even

ue

(dol

lars

per

hai

rcut

)




10

20

16

14

DMR

cd


Total revenue gain $14

Marginal revenue $10


Pri

ce &

mar

gin

al r

even

ue

(dol

lars

per

hai

rcut

)




A Monopoly’s Output and Price Decision

Marginal MarginalPrice Quantity Total revenue Total cost(P) demanded revenue cost

Profit(dollars (Q) (TR = P Q) (dollars per (TC) (dollars per(TR – TC)per haircut) (haircuts/hour) (dollars) add. haircut) (dollars) add.

haircut) (dollars)

)/( QTRMR )/( QTCMC

20 0 0

18 1 18

16 2 32

14 3 42

12 4 48

10 5 50

-

18

14

10

6

2




haircut) (dollars)

)/( QTRMR )/( QTCMC

20 0 0 20

18 1 18 21

16 2 32 24

14 3 42 30

12 4 48 40

10 5 50 55

-

18

14

10

6

2




haircut) (dollars)

)/( QTRMR )/( QTCMC

20 0 0 20

18 1 18 21

16 2 32 24

14 3 42 30

12 4 48 40

10 5 50 55

-

18

14

10

6

2

-




haircut) (dollars)

)/( QTRMR )/( QTCMC

20 0 0 20

18 1 18 21

16 2 32 24

14 3 42 30

12 4 48 40

10 5 50 55

-

18

14

10

6

2

-

1




haircut) (dollars)

)/( QTRMR )/( QTCMC

20 0 0 20

18 1 18 21

16 2 32 24

14 3 42 30

12 4 48 40

10 5 50 55

-

18

14

10

6

2

-

1

3




haircut) (dollars)

)/( QTRMR )/( QTCMC

20 0 0 20

18 1 18 21

16 2 32 24

14 3 42 30

12 4 48 40

10 5 50 55

-

18

14

10

6

2

-

1

3

6




haircut) (dollars)

)/( QTRMR )/( QTCMC

20 0 0 20

18 1 18 21

16 2 32 24

14 3 42 30

12 4 48 40

10 5 50 55

-

18

14

10

6

2

-

1

3

6

10




haircut) (dollars)

)/( QTRMR )/( QTCMC

20 0 0 20

18 1 18 21

16 2 32 24

14 3 42 30

12 4 48 40

10 5 50 55

-

18

14

10

6

2

-

1

3

6

10

15




haircut) (dollars)

)/( QTRMR )/( QTCMC

20 0 0 20 -20

18 1 18 21

16 2 32 24

14 3 42 30

12 4 48 40

10 5 50 55

-

18

14

10

6

2

-

1

3

6

10

15




haircut) (dollars)

)/( QTRMR )/( QTCMC

20 0 0 20 -20

18 1 18 21 -3

16 2 32 24

14 3 42 30

12 4 48 40

10 5 50 55

-

18

14

10

6

2

-

1

3

6

10

15




haircut) (dollars)

)/( QTRMR )/( QTCMC

20 0 0 20 -20

18 1 18 21 -3

16 2 32 24 +8

14 3 42 30

12 4 48 40

10 5 50 55

-

18

14

10

6

2

-

1

3

6

10

15




haircut) (dollars)

)/( QTRMR )/( QTCMC

20 0 0 20 -20

18 1 18 21 -3

16 2 32 24 +8

14 3 42 30 +12

12 4 48 40

10 5 50 55

-

18

14

10

6

2

-

1

3

6

10

15




haircut) (dollars)

)/( QTRMR )/( QTCMC

20 0 0 20 -20

18 1 18 21 -3

16 2 32 24 +8

14 3 42 30 +12

12 4 48 40 +8

10 5 50 55

-

18

14

10

6

2

-

1

3

6

10

15




haircut) (dollars)

)/( QTRMR )/( QTCMC

20 0 0 20 -20

18 1 18 21 -3

16 2 32 24 +8

14 3 42 30 +12

12 4 48 40 +8

10 5 50 55 -5

-

18

14

10

6

2

-

1

3

6

10

15




haircut) (dollars)

)/( QTRMR )/( QTCMC

20 0 0 20 -20

18 1 18 21 -3

16 2 32 24 +8

14 3 42 30 +12

12 4 48 40 +8

10 5 50 55 -5

-

18

14

10

6

2

-

1

3

6

10

15

0 1 2 3 4 5

10

20

30

40

50


Tota

l rev

enue

and

tota

l cos

t(d

olla

rs p

er h

our)

A Monopoly’s Output and Price

0 1 2 3 4 5

10

20

30

40

50


Tota

l rev

enue

and

tota

l cos

t(d

olla

rs p

er h

our)


TR

Note TR curve is notlinear like it is in perfect

competition

0 1 2 3 4 5

10

20

30

40

50


Tota

l rev

enue

and

tota

l cos

t(d

olla

rs p

er h

our)


TR

Note slope of TR curve (which is MR)

declines as Q increases

0 1 2 3 4 5

10

20

30

40

50

Tota

l rev

enue

and

tota

l cos

t(d

olla

rs p

er h

our)


TR


TC

Note slope of TC curve is MC

0 1 2 3 4 5

10

20

30

40

50

Tota

l rev

enue

and

tota

l cos

t(d

olla

rs p

er h

our)


TR


TC

Note MC increases with Q because of

diminishing returns

0 1 2 3 4 5

10

20

30

50

Tota

l rev

enue

and

tota

l cos

t(d

olla

rs p

er h

our)


TR


Economicprofit = $12

TC

42

0 1 2 3 4 5

10

20

30

50

Tota

l rev

enue

and

tota

l cos

t(d

olla

rs p

er h

our)


TR



TC

42

Note that at maximum profits slope of TR = slope of TC (or

MR=MC)

0 1 2 3 4 5

10

14

20


Pri

ce a

nd

cos

t (do

llar

s pe

r ho

ur)


D = AR = P

0 1 2 3 4 5

10

14

20


Pri

ce a

nd

cos

t (do

llar

s pe

r ho

ur)

D = AR = P

MR


0 1 2 3 4 5

10

14

20


Pri

ce a

nd

cos

t (do

llar

s pe

r ho

ur)

D = AR = P

MC

MR



0 1 2 3 4 5

14

20


Pri

ce a

nd

cos

t (do

llar

s pe

r ho

ur)

D = AR = P

ATC

MC

MR

TR = 14x3 = 42


0 1 2 3 4 5

14

20


Pri

ce a

nd

cos

t (do

llar

s pe

r ho

ur)

D = AR = P

ATC

MC

MR


0 1 2 3 4 5

10

14

20


Pri

ce a

nd

cos

t (do

llar

s pe

r ho

ur)

D = AR = P

ATC

MC

MR

TC = 10x3 = 30


0 1 2 3 4 5

10

14

20


Pri

ce a

nd

cos

t (do

llar

s pe

r ho

ur)

D = AR = P

ATC

MC

MR


0 1 2 3 4 5

10

14

20


Pri

ce a

nd

cos

t (do

llar

s pe

r ho

ur)

D = AR = P

ATC

MC

MR


Profit = $12($4 x 3 units)

Monopoly Profits A positive profit is still not

guaranteed, even for a monopoly. Total profit depends on the position of

the ATC curve relative to the demand curve.

However, we don’t see many unprofitable monopolies. If you’re the sole supplier of a good and

still can’t make a profit, how long will you stay in the business?

Rent Seeking

Because a monopoly creates economic profit in the long-run, people devote a lot of effort to obtain monopoly rights.

This activity is called rent seeking. The firm is attempting to capture some of

the consumer surplus for itself.

Comparing Monopolyand Competition

How do the quantities produced, prices, and profits of a monopoly compare with those of a perfectly competitive industry?

Consider a hypothetical example of a perfectly competitive industry which suddenly becomes a monopoly.

Comparison of Monopoly and Perfect Competition

Compared to a perfectly competitive market, a single-price monopoly restricts its output and charges a higher price.

Price and Output A perfectly competitive industry will

produce the quantity of output and charge the price at the equilibrium point where the industry MC curve intersects the demand curve.

A monopoly will produce the quantity of output dictated by the intersection of the MR and MC curves, charging a price set by the demand curve.

Monopoly andCompetition Compared

Pri

ce

Quantity

PA

PM

PC

0

D=AR=PMR

S,MC

QM QC

Single-pricemonopolyrestricts output,raises price (MR=MC)

Equilibriumin competitiveindustry (P=MC)

Inefficiency of MonopolyP

rice

Quantity

PA

0

D=AR=P

QC

PC

S, MC

PerfectCompetition

ConsumerSurplus underCompetition


rice

Quantity

PA

0

D=AR=P

QC

PC

S, MC

PerfectCompetition

ConsumerSurplus underCompetition

ProducerSurplus underCompetition


rice

Quantity

PA

PM

0

D=AR=PMR

S, MC

QM QC

PC

ConsumerSurplus underMonopoly

ProducerSurplus underMonopoly

Monopoly


rice

Quantity

PA

PM

0

D=AR=PMR

S, MC

QM QC

PC


Monopoly’sgain in ProducerSurplus

Deadweight loss inConsumer Surplus

Monopoly


rice

Quantity

PA

PM

0

D=AR=PMR

S, MC

QM QC

PC


Monopoly’sgain in ProducerSurplus

Deadweight loss inConsumer Surplus

Monopoly

Deadweight loss inProducer Surplus

Inefficiency of Monopoly Assuming Constant Marginal Cost

Pri

ce

Quantity

PA

0

D=AR=P

QC

PC S, MC

PerfectCompetition

ConsumerSurplus UnderCompetition


Pri

ce

Quantity

PA

PM

0

D=AR=PMR

S, MC

QM QC

PC

ConsumerSurplus underMonopoly Monopoly


Pri

ce

Quantity

PA

PM

0

D=AR=PMR

S, MC

QM QC

PC

ConsumerSurplus underMonopoly Monopoly

Loss in ConsumerSurplus underMonopoly


Pri

ce

Quantity

PA

PM

0

D=AR=PMR

S, MC

QM QC

PC


Monopoly’sgain inProducer Surplus

Monopoly


Pri

ce

Quantity

PA

PM

0

D=AR=PMR

S, MC

QM QC

PC


Monopoly’sgain inProducer Surplus

Deadweight lossUnder Monopoly

Monopoly

Monopoly Policy Issues

Regulating Natural MonopolyWhen demand and cost conditions create natural monopoly, government agencies regulate the monopoly.This figure shows how a natural monopoly might be regulated.


With no regulation, the monopoly maximizes profit.It produces the quantity at which marginal revenue equals marginal cost.In this case, profits=$4, calculated as (P-ATC)xQ=(20-18)x2=$4


This regulation is the marginal cost pricing rule, and it results in an efficient use of resources.Regulating a natural monopoly in the public interest sets output where MB = MC and thus the price equal to marginal cost (D=AR=P=MC).

14


But with price equal to marginal cost, ATC exceeds price and the monopoly incurs an economic loss.In this case, the loss=-$16, calculated as (P-ATC)xQ=(10-14)x4=-$16If the monopoly receives a subsidy to cover its loss, taxes must be imposed on other economic activity, which create deadweight loss.

14

Monopoly Policy IssuesWhere possible, a regulated natural monopoly might be permitted to price discriminate to cover the loss from marginal cost pricing.Another alternative (which is easy to implement in practice) is to produce the quantity at which price equals average total cost and to set the price equal to average total cost—the average cost pricing rule (P=ATC).With this pricing rule, the natural monopoly earns only normal profits (economic profits are zero). This is because (P-ATC)xQ=(15-15)x3=0

Documents

CHAPTER 13 Monopoly. Competition and Efficiency Allocative efficiency occurs when no resources are wasted. This means no individual can be made better