8) If the long-run average total cost curve for a firm is horizontal in the relevant range
of production, then it indicates that there:
A.Is a minimum efficient scale
B.Are constant returns to scale
C.Are diseconomies of scale
D.Are economies of scale
9) Which of the following constitutes an implicit cost to the Johnston Manufacturing
Company?
A.Payments of wages to its office workers.
B.Rent paid for the use of equipment owned by the Schultz Machinery Company.
C.Use of savings to pay operating expenses instead of generating interest income.
D.Economic profits resulting from current production.
10) Assume labor is the only variable input and that an additional input of labor
increases total output from 72 to 78 units. If the product sells for $6 per unit in a purely
competitive market, the MRP of this additional worker is:
A.$6.
B.$12.
C.$36.
D.$72.
11) Which of the following is not a major category of business structure?
A.Sole proprietorship
B.Partnership
C.Public agency
D.Corporation
12) The Herfindahl index:
A.measures the prices charged by oligopolistic manufacturers.
B.is another name for the four-firm concentration ratio.
C.tells us whether oligopolistic firms are engaging in collusion.
D.gives much greater weight to larger firms than to smaller firms in an industry.