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一道AP微观经济问题There is relatively more crowding out as the resul

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一道AP微观经济问题
There is relatively more crowding out as the result of expansionary fiscal policy when
(a) expansionary monetary policy accompanies the fiscal policy
(b)the investment demand curve is inelastic
(c)the investment demand curve is elastic
我怎么觉得AC都对啊.
只有c.
a.扩张的货币政策伴随着扩张的财政政策的话,收入提高引致的货币需求可以从扩张的货币供给得到满足,减少利率的提高,投资下降少,挤出效应减小.
b. 扩张的财政政策,收入提高,引致货币需求提高,利率上升,但投资对利率不敏感,所以减少的小,挤出效应小.
只有c挤出效应明显,投资对利率敏感,利率提高,投资大幅度减少,挤出效应明显.