单选题 An analyst does research about expansionary fiscal policy. An increase in a government's spending and a decrease in a government's tax will most likely cause a decrease in:
A. private saving only.
B. private investment only.
C. both private saving and private investment.

【正确答案】 B

【答案解析】[解析] 本题考查的是挤出效应(crowding-out effect)的定义。政府增加支出并且减少税收是一种扩张性的财政政策，会导致预算赤字的增加，而预算赤字增加会导致政府储蓄减少，从而导致市场利率上升，私人投资下降，这就是所谓的挤出效应，它不会导致私人储蓄下降。