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1、Macroeconomics,Lecture 18 习 题 课By Li Bingnian,曲线推导问题,S,S,Y,I,I,i,i,Y,待推导曲线,IS Curve,核心等式,I=I(i),S=S(Y),右上倾斜,左下倾斜,Problem:IS-LM Model,考察下列混合经济:C=200+0.8Yd I=5000-36000i T=0.2Y Md=2Y-20000i Ms=1/0.2H G=2000 H=2000,(1.a)推导和写出IS曲线,核心方程:,Problem:IS-LM Model,考察下列混合经济:C=200+0.8Yd I=5000-36000i T=0.2Y Md=2Y
2、-20000i Ms=1/0.2H G=2000 H=2000,核心方程:Md=MS,Md=2Y-20000i,Ms=1/0.2H,H=2000,(1.b)推导和写出LM曲线,Problem:IS-LM Model,Problem:IS-LM Model,政府支出增加200扩张性财政政策效果政府支出导致IS曲线怎样移动:曲线左移距离IS曲线:,Problem:IS-LM Model,Problem:IS-LM Model,注意:乘数理论显示的只是IS曲线的移动幅度,并不代表均衡的产出Y 的变化幅度,均衡点需要考虑挤出效应。即:计算时必须用IS与 LM的联立来求解。,Problem:IS-LM
3、Model,Problem:IS-LM Model,Problem:AD-AS Model,Problem:AD-AS Model,(1)解:,Problem:AD-AS Model,P=0.2+0.3U+0.7W,W=0.5-0.6N+o.5P,AS曲线推导,Problem:AD-AS Model,Problem:AD-AS Model,Problem:AD-AS Model,P,P,Y,Y,Ld,N,N,Ld,菲利普斯曲线,AS,AD,Problem:AD-AS Model,Problem:AD-AS Model,Problem:AD-AS Model,Problem:M-F Model,Problem:M-F Model,Problem:M-F Model,Problem:M-F Model,Problem:M-F Model,i,y,IS,LM,BP,Problem:M-F Model,Problem:M-F Model,Problem:M-F Model,Problem:M-F Model,Problem:M-F Model,Problem:Lucas Model,Problem:Lucas Model,Problem:Lucas Model,Problem:Lucas Model,Problem:Lucas Model,Problem:Lucas Model,