Question

一道经济学原理的问题(英文）

ASIMO is a small, closed economy defined by the following equations:
C = 300+ 0.8(Y − T) − 500r; I = 400; T = 100; G = 80;
In the money market we have:
The real money demand function: Md/P = 0.5Y − 250r;
Money supply is fixed: Ms = 10000;
In equilibrium， set P = 10.
(a) Find equilibrium Y and r.
(b) Suppose the central bank of ASIMO decides to perform an open market purchase of 250 in securities. If the reserve requirement ratio is 0.10, what is the effect of this operation in the money market? what is the new equilibrium Y and r? What happens to the AD curve in this case?
(c) Going back to the original set of equations in part (a), suppose the government of ASIMO increases its spending by 100. Find the new equilibrium Y and r. This is related to the “crowding-out effect.” Calculate and Explain the crowding-out effect. Make sure your answer is specific to the model in this problem.

Answer 1

ASIMO是一个由以下等式定义的小型封闭经济体：
C = 300+ 0.8(Y − T) − 500r; I = 400; T = 100; G = 80;
在货币市场中我们有：
实际的货币需求函数： Md/P = 0.5Y − 250r；
货币供应是固定的：Ms = 10000;
处于平衡态，设置P＝10.
(a)找到Y和r的平衡点。
(b)设想ASIMO的中央银行决定施行一个开放的市场，购买了250有价证券。如果存款准备金率为0.10，那么这一举动对货币市场将产生什么影响？Y与r的新的平衡点是多少？此种情况下的AD曲线（总需求曲线）是什么走向？
(c)重新回到(a)部分原始等式，假如ASIMO政府增加100的消费额。找出Y和r的新的平衡点。这与“挤出效应”相关联。计算并解释挤出效应。并且要确保你的回答就是针对本模型的此类问题的。

只会翻译，不会做！

Answer 2

（1）Y=2250，r＝0.5
（2）货币供给增加225，Y=2287.5 r=0.485
（3）Y=2333.33 r=三分之二。挤出效应为317。
不知道对不对