民用建筑外保温复合墙体的组成部分不包括（）。

在凯恩斯交叉图中，假设消费函数如下：

C=200+0.75(Y-T)

计划投资是100；政府购买和税收都是100。

a．画出作为收入的函数的计划支出。

b．均衡的收入水平是多少？

c．如果政府购买增加到125，新的均衡收入是多少？

d．为了达到1600美元的收入。需要的政府购买水平是多少？

In the Keynesian cross, assume that the consumption function is given by

C=200+0.75(Y-T)

Planned investment is 100; government purchases and taxes are both 100.

a．Graph planned expenditure as a function of income.

b．What is the equilibrium level of income？

c．If government purchases increase to 125, what is the new equilibrium income？

d．What level of government purchases is needed to achieve an income of 1,600？

假设在一开放的经济中，消费函数为C＝300+0.8(Y-T)，投资支出I=200－1500，政府购买G=200，净出口函数NX=100+0.02Y－500，税收函数NT=0.4Y，货币需求函数L=0.5Y－2000，名义货币供给M=200，价格水平P=1。试求：

（1）IS曲线方程和LM曲线方程。

（2）产品市场和货币市场同时均衡时的收入和利率

考虑赫克索尼亚经济。

a．消费函数是：C=200+0.75(Y-T)；投资函数是：I=200-25r：政府购买和税收都是100，针对这个经济体，画出r在0～8之间的IS曲线。

b．在赫克索尼亚，货币需求函数是：(M/P)^d=Y-100r：货币供给M是1000，物价水平P是2，针对这个经济，画出r在0～8之间的LM曲线。

c．找出均衡利率r和均衡收入水平Y。

d．假定政府购买从：100增加到150，IS曲线会移动多少？新的均衡利率和收入水平是多少？

e．假设货币供给从1000增加到1200，LM曲线会移动多少？新的均衡利率和收入水平是多少？

f．使用货币和财政政策的初始值，假设物价水平从2上升到4，会发生什么变化？新的均衡利率和收入水平是多少？

g．推导并画出总需求方程式。如果财政或货币政策像(d)和(e)部分那样变动，这条总需求曲线会发生什么变动？

Consider the economy of Hicksonia.

a．The consumption function is given by C=200+0.75(Y-T). The investment function is I=200-25r. Government purchases and taxes are both 100. For this economy, graph the IS curve for r ranging from 0 t0 8.

b．The money demand function in Hicksonia is (M/P)^d=Y-100r. The money supply M is 1,000 and the price level P is 2. For this economy, graph the LM curve for r ranging from 0 to 8.

c．Find the equilibrium interest rate r and the equilibrium level of income Y.

d．Suppose that government purchases are raised from 100 to 150. How much does the IS curve shift？ What are the new equilibrium interest rate and level of income？

e．Suppose instead that the money supply is raised from 1,000 to 1,200. How much does the LM curve shift？ What are the new equilibrium interest rate and level of income？

f．With the initial values for monetary and fiscal policy, suppose that the price level rises from 2 to 4. What happens？ What are the new equilibrium interest rate and level of income？

g．Derive and graph an equation for the aggregate demand curve. What happens to this aggregate demand curve if fiscal or monetary policy changes, as in parts (d) and (e)？