William Rainey Harper College
ECO 211

Review

Ch. 8 and 9 Pure Competition
[Review]

INSTRUCTION: Select the BEST answer for each question by marking the circle next to your selection

1.

Given the table below, what is the short-run profit-maximizing level of output for the firm?

Output

Total revenue

Total cost

1

$ 4

$ 2

2

8

3

3

12

6

4

16

9

5

20

14

A.

2 units

B.

3 units

C.

4 units

D.

5 units



2.

Assume the price of a product sold by a purely competitive firm is $5. Given the data in the accompanying table, at what output is total profit highest in the short run?

Output

Total cost

20

$ 70

25

75

30

85

35

100

40

125

45

155

50

190

A.

20

B.

30

C.

40

D.

50



3.

In which market model would the number of firms be the fewest?

A.

monopolistic competition

B.

pure competition

C.

pure monopoly

D.

oligopoly



4.

Under which market model are the conditions of entry into the market easiest?

A.

pure competition

B.

pure monopoly

C.

monopolistic competition

D.

oligopoly



5.

Which idea is inconsistent with pure competition?

A.

short-run losses

B.

product differentiation

C.

freedom of entry or exit for firms

D.

a large number of buyers and sellers



6.

Which characteristic would best be associated with pure competition?

A.

few sellers

B.

price taker

C.

nonprice competition

D.

product differentiation



7.

In pure competition, the average revenue of a firm always equals:

A.

marginal cost.

B.

marginal revenue.

C.

average total cost.

D.

total revenue.



8.

Answer the question based on the table below.

Price

Quantity

TFC

TVC

$ 5

5

$25

$10

5

10

25

20

5

15

25

50

5

20

25

60

At what point on the table would a purely competitive firm cover all of its costs and earn only normal profits?

A.

Q = 5

B.

Q = 10

C.

Q = 15

D.

Q = 20



9.

Let us suppose Harry's, a local supplier of chili and beer, has the following revenue and cost structure:

total revenue$3,000 per week
total variable cost$2,000 per week
total fixed costs$2,000 per week

A.

Harry's should stay open in the long run.

B.

Harry's should shut down in the short run.

C.

Harry's should stay open in the short run.

D.

Harry's should shut down in the short run but reopen in the long run.



10.


R-1 REF 23-45

Refer to the above graph. Which of the output levels is the profit-maximizing output level for this firm?

A.

Q1

B.

Q2

C.

Q3

D.

Q4



11.

Use the table below to answer the next question(s) for a purely competitive firm.

Output

Total revenue

Total cost

0

$ 0

$ 50

1

40

74

2

80

94

3

120

117

4

160

142

5

200

172

R-2 REF 23-49 (REF23049)

Refer to the above table. The marginal revenue from the third unit of output is:

A.

$40.

B.

$50.

C.

$120.

D.

$160.



12.

Use the table below to answer the next question(s) for a purely competitive firm.

Output

Total revenue

Total cost

0

$ 0

$ 50

1

40

74

2

80

94

3

120

117

4

160

142

5

200

172

R-2 REF 23-49 (REF23049)

Refer to the above table. When the firm produces 3 units of output, it makes an economic:

A.

profit of $3.

B.

loss of $3.

C.

profit of $9.

D.

loss of $9.



13.

Use the table below to answer the next question(s) for a purely competitive firm.

Output

Total revenue

Total cost

0

$ 0

$ 50

1

40

74

2

80

94

3

120

117

4

160

142

5

200

172

R-2 REF 23-49 (REF23049)

Refer to the above table. The marginal cost of the third unit of output is:

A.

$20.

B.

$23.

C.

$24.

D.

$25.



14.

Which is true for a purely competitive firm in short-run equilibrium?

A.

The firm is making only normal profits.

B.

The firm's marginal cost is greater than its marginal revenue.

C.

The firm's marginal revenue is equal to its marginal cost.

D.

A decrease in output would lead to a rise in profits.



15.


R-3 REF 22-68

Using the diagram above, in order to maximize profits, this firm would produce ____________ which would result in ____________.

A.

0D units, a loss equal to ABGH

B.

0E units, a loss equal to ALFH

C.

0D units, economic profits equal to BCFG

D.

0E units, economic profits equal to ABGH



16.

Pure competition produces a socially optimal allocation of resources in the long run because:

A.

marginal cost equals marginal revenue.

B.

marginal cost equals average total cost.

C.

marginal revenue equals price.

D.

marginal cost equals price.



17.

In long-run equilibrium a purely competitive firm will operate where price is:

A.

greater than MR but equal to MC and minimum ATC.

B.

greater than MR and MC, but equal to minimum ATC.

C.

greater than MC and minimum ATC, but equal to MR.

D.

equal to MR, MC, and minimum ATC.



18.

Productive efficiency refers to:

A.

cost minimization, where P =