宏觀經(jīng)濟(jì)學(xué)chappt課件(2)(已修改)
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【正文】 slide 1CHAPTER 10 Aggregate Demand IChapter 10Aggregate Demand I:Building the IS LM Modelslide 2CHAPTER 10 Aggregate Demand IIn this chapter, you will learn…167。 the IS curve, and its relation to167。 the Keynesian cross167。 the loanable funds model167。 the LM curve, and its relation to167。 the theory of liquidity preference 167。 how the ISLM model determines ine and the interest rate in the short run when P is fixed slide 3CHAPTER 10 Aggregate Demand IContext167。 Chapter 9 introduced the model of aggregate demand and aggregate supply. 167。 Long run167。 prices flexible167。 output determined by factors of production amp。 technology167。 unemployment equals its natural rate167。 Short run167。 prices fixed167。 output determined by aggregate demand167。 unemployment negatively related to outputslide 4CHAPTER 10 Aggregate Demand IContext167。 This chapter develops the ISLM model, the basis of the aggregate demand curve. 167。 We focus on the short run and assume the price level is fixed (so, SRAS curve is horizontal). 167。 This chapter (and chapter 11) focus on the closedeconomy case. Chapter 12 presents the openeconomy case.slide 5CHAPTER 10 Aggregate Demand IThe Keynesian Cross167。 A simple closed economy model in which ine is determined by expenditure. (due to . Keynes)167。 Notation: I = planned investmentE = C + I + G = planned expenditureY = real GDP = actual expenditure167。 Difference between actual amp。 planned expenditure = unplanned inventory investmentslide 6CHAPTER 10 Aggregate Demand IElements of the Keynesian Crossconsumption function:for now, plannedinvestment is exogenous:planned expenditure:equilibrium condition:govt policy variables:actual expenditure = planned expenditureslide 7CHAPTER 10 Aggregate Demand IGraphing planned expenditureine, output, Y EplannedexpenditureE =C +I +G MPC1slide 8CHAPTER 10 Aggregate Demand IGraphing the equilibrium conditionine, output, Y EplannedexpenditureE =Y 45186。slide 9CHAPTER 10 Aggregate Demand IThe equilibrium value of ineine, output, Y EplannedexpenditureE =Y E =C +I +G Equilibrium ineslide 10CHAPTER 10 Aggregate Demand IAn increase in government purchasesY EE =Y E =C +I +G1E1 = Y1E =C +I +G2E2 = Y2?YAt Y1, there is now an unp
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