Handout for Monopoly Lecture

What is the market structure for each of these products or firms: competitive, monopoly, oligopoly, monopolistic competition?

Single Market Monopoly

Quantity

Market Demand Price

Total Costs

Marginal Cost

Average Total Cost

0

100.00

800

10

95.00

1,500

82.50

150.00

20

90.00

2,450

65.00

122.50

30

85.00

2,800

42.50

93.33

40

80.00

3,300

32.50

82.50

50

75.00

3,450

20.50

69.00

60

70.00

3,710

18.50

61.83

70

65.00

3,820

9.50

54.57

80

60.00

3,900

9.00

48.75

90

55.00

4,000

10.00

44.44

100

50.00

4,100

12.50

41.00

110

45.00

4,250

17.50

38.64

120

40.00

4,450

20.00

37.08

130

35.00

4,650

25.00

35.77

140

30.00

4,950

30.00

35.36

150

25.00

5,250

35.00

35.00

160

20.00

5,650

45.00

35.31

170

15.00

6,150

60.00

36.18

180

10.00

6,850

75.00

38.06

190

5.00

7,650

100.00

40.26

200

0.00

8,850

44.25

Question: For the monopolist shown above, what is the best price and quantity from among the following:

Hint: Maximize economic profits.

Price Discriminating Monopoly

Price Discrimination in the Movie Theatre Market

Price per ticket

Quantity adult movie tickets

Quantity senior movie tickets

Total Demand for Tickets

Single Price Total Revenue

Single Price Marginal Revenue

Adult Total Revenue

Adult Price Marginal Revenue

Senior Total Revenue

Senior Price Marginal Revenue

Marginal Cost

Single Price Economic Profits

12.00

200

0

200

2,400

2,400

0

1.00

2,200

11.50

225

25

250

2,875

9.00

2,588

7.00

288

11.00

1.00

2,625

11.00

250

50

300

3,300

8.00

2,750

6.00

550

10.00

1.00

3,000

10.50

275

75

350

3,675

7.00

2,888

5.00

788

9.00

1.00

3,325

10.00

300

100

400

4,000

6.00

3,000

4.00

1,000

8.00

1.00

3,600

9.50

325

125

450

4,275

5.00

3,088

3.00

1,188

7.00

1.00

3,825

9.00

350

150

500

4,500

4.00

3,150

2.00

1,350

6.00

1.00

4,000

8.50

375

175

550

4,675

3.00

3,188

1.00

1,488

5.00

1.00

4,125

8.00

400

200

600

4,800

2.00

3,200

0.00

1,600

4.00

1.00

4,200

7.50

425

225

650

4,875

1.00

3,188

-1.00

1,688

3.00

1.00

4,225

7.00

450

250

700

4,900

0.00

3,150

-2.00

1,750

2.00

1.00

4,200

6.50

475

275

750

4,875

-1.00

3,088

-3.00

1,788

1.00

1.00

4,125

6.00

500

300

800

4,800

-2.00

3,000

-4.00

1,800

0.00

1.00

4,000

5.50

525

325

850

4,675

-3.00

2,888

-5.00

1,788

-1.00

1.00

3,825

5.00

550

350

900

4,500

-4.00

2,750

-6.00

1,750

-2.00

1.00

3,600

4.50

575

375

950

4,275

-5.00

2,588

-7.00

1,688

-3.00

1.00

3,325

4.00

600

400

1,000

4,000

-6.00

2,400

-8.00

1,600

-4.00

1.00

3,000

3.50

625

425

1,050

3,675

-7.00

2,188

-9.00

1,488

-5.00

1.00

2,625

3.00

650

450

1,100

3,300

-8.00

1,950

-10.00

1,350

-6.00

1.00

2,200

2.50

675

475

1,150

2,875

-9.00

1,688

-11.00

1,188

-7.00

1.00

1,725

2.00

700

500

1,200

2,400

1,400

1,000

1.00

1,200

Question: Can the movie theater monopolist make higher economic profits by charging different prices for adults and seniors?

Go back to the lecture.


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