Which of the following statements best explains why long-run average cost is never greater than short-run average cost?
A) In the long run, tangency of the isocost and isoquant is attainable. This is not necessarily true in the short run.
B) In the long run, diseconomies of scale might not occur, but in the short run diminishing marginal returns do.
C) In the long run, the cost of capital declines because the firm is able to pay down some of its debts.
D) In the long run, the average cost curve need not be U-shaped, but in the short run it is.
A
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The monthly mortgage payments made by a homeowner are
A) always sunk costs because the costs of constructing the house lie entirely in the past. B) marginal costs if the house is new but sunk costs if it was purchased from a previous owner. C) marginal costs of continuing to own and occupy the house. D) not marginal costs because the house will continue to exist whether or not the payments are made. E) sunk costs only if all the bills for earlier construction work have been fully paid.
In the Thomas (1954) model,
(a) all nations near the Atlantic Ocean were considered one economic unit. (b) laborers, capital and other resources freely move to those users with the highest net returns. (c) the European economy moved inversely in relation to the U.S. economy and vice versa. (d) all of the above are true.
Lara will agree to a second date with Tom only if, on their first date, Tom is well mannered and well dressed. Lara is using a
a. Screening mechanism b. Signaling mechanism c. All of the above d. None of the above
Which of the following is not likely to cause a change in the supply of wheat?
a. a government subsidy to farmers who do not grow wheat b. an increase in the price of soybeans c. a decrease in the price of fertilizer d. a fall in the price of wheat e. producers expect product prices to rise