[单选]A tax placed on a good
A. causes the effective price to sellers to increase.
B. affects the welfare of buyers of the good but not the welfare of sellers.
C. causes the equilibrium quantity of the good to decrease.
D. creates a burden that is usually borne entirely by the sellers of the good.
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[单选]小麦农民种大麦而不种小麦能挣的钱是
A. 显性成本。
B. 会计成本
C. 隐性成本
D. 放弃的会计利润。
[单选] The graph illustrates a typical
A. total-cost curve.
B. production function.
C. production possibilities frontier.
D. fixed-cost curve.
[单选] The changing slope of the total cost curve reflects
A. decreasing average variable cost.
B. decreasing average total cost.
C. decreasing marginal product.
D. increasing fixed cost.
[单选]Which of the following costs of publishing a book is a fixed cost?
A. author royalties of 5% per book
B. the costs of paper and binding
C. shipping and postage expenses
D. composition, typesetting, and jacket design for the book
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