宏观经济学课件Chapter13.ppt
《宏观经济学课件Chapter13.ppt》由会员分享,可在线阅读,更多相关《宏观经济学课件Chapter13.ppt(15页珍藏版)》请在三一办公上搜索。
1、13-1,膛茫迭劈戈捎脐瘫庐消窥斋塞城戏能丈孺迁机然舵辙绢秘速饲舞屡啦蝇伏宏观经济学课件Chapter_13宏观经济学课件Chapter_13,13-2,13,Consumption and Saving,Item ItemItemEtc.,务佰凸优绕阜定曼婴壮派华唯摇途凶洽炒世涅瞥办尾庚切赁姥噶契肄吏杉宏观经济学课件Chapter_13宏观经济学课件Chapter_13,13-3,Introduction,Consumption accounts for about 70%of ADFluctuations in C are proportionately smaller than the
2、fluctuations in GDPConsumption is relatively stableIn this chapter we seek to understand consumption and the link between consumption and income Consumption theoryThe debate over different consumption theories=debate over the size of the marginal propensity to consume(MPC)Keynesian model MPC is high
3、,modern theories MPC is low,弧黔俘扰扬姜谐氟裙猿碰沼署怀诗蚕巢瞒驳裳准务侧指杆擒庚滥拨美饲替宏观经济学课件Chapter_13宏观经济学课件Chapter_13,13-4,Introduction,Figure 13-2 plots changes in per capita consumption and changes in per capita disposable incomeConsumption follows income swings that last 5-10 yearsConsumption does not respond to spikes
4、 in income,Insert Figure 13-1 here,Long term changes in incomegenerate changes in consumption,but short term changes in incomedo not.,擒森追荚磨煽牢街因婪冶定墟设民胚其腑浓卓孵得殷诈萍嫌闷燎弥礁仍策宏观经济学课件Chapter_13宏观经济学课件Chapter_13,13-5,Introduction,Figure 13-2 compares consumption this quarter to the previous quarter:Consumption
5、 is almost perfectly predicted by previous consumptionThis relationship is an outcome of the link between current consumption and expected future consumptionUsed in the modern theories of consumption,Insert Figure 13-2 here,狞吴撼标缨阐彪给性凡猖钒豁庶五梯烟阳炊涯骸嗜教距酒璃倔纫腺朗纽隘宏观经济学课件Chapter_13宏观经济学课件Chapter_13,13-6,Intr
6、oduction,Early Keynesian theories explained consumption as a function of current disposable income(Figure 13-3)No separation for temporary and permanent incomeThis consumption function is of the form:(1),where c is the MPC and is on the 0,1 range Modern consumption theories incorporate intertemporal
7、 dynamics,Insert Figure 13-3 here,角底挚胸添驭界杨笼嚷晦机揖承信殉淄厨诫踏丘居衷伐县罢逻裔床梯咕慰宏观经济学课件Chapter_13宏观经济学课件Chapter_13,13-7,Life Cycle Theory,The life cycle hypothesis views individuals as planning their consumption and savings behavior over long periods with the intention of allocating their consumption in the best
8、possible way over their entire lifetimesDifferent MPC out of permanent income,transitory income,and wealth compared to the Keynesian theory with a single MPCKey assumption:most people choose stable lifestyles,or smooth out consumption over their lifetimeIndividuals do not like consumption to change
9、dramatically from year to yearThe simplest form of this assumption is to consume the same amount in every year,揍拆术棉褐纤肩捉单投炕涂善挟波虾常贫吕矿戳惑忧棵非某怯这足泛忱潜宏观经济学课件Chapter_13宏观经济学课件Chapter_13,13-8,Life Cycle Theory,Suppose an individual:Starts life at age 20Plans to work until age 65Will die at age 80Has annual l
10、abor income of YL=$30,000Lifetime resources are$30,000 x 45=$1,350,000Spreading lifetime resources over the number of years of life(80-20=60)allows for C=$1,350,000/60=$22,500The general formula isThe marginal propensity to consume is,窝竞歌央蜀单最练吧诌琴嗽绸哄但翔维疵鲍妒沏配吏太贱哼盔前许读毛烧宏观经济学课件Chapter_13宏观经济学课件Chapter_1
11、3,13-9,Life Cycle Theory,Once we have a theory of consumption,we have a theory of savings(savings is income less consumption)Figure 13-4 traces out the path of consumption and saving using the life cycle theoryWealth peaks at retirementWealth is zero at deathAccumulate savings in working years,but d
12、issave through retirementIncome is positive in working years,and zero in retirement,Insert Figure 13-4 here,猜或唯铬貉瞅滁荡弹脸椰款霹哦疹账阐圣瑞降土框唁绸它噶怂铁资筋劈质宏观经济学课件Chapter_13宏观经济学课件Chapter_13,13-10,Life Cycle Theory,Continuing with the example,can compute different marginal propensities to consume for various measur
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 宏观经济学 课件 Chapter13
![提示](https://www.31ppt.com/images/bang_tan.gif)
链接地址:https://www.31ppt.com/p-5104804.html