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第 2 章 供给和需求的基本原理 PowerPoint PPT Presentation


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第 2 章 供给和需求的基本原理. 导读 第一节 市场机制 第二节 供给和需求的变动 第三节 供给和需求的弹性 第四节 供求及弹性理论的应用 第五节 蛛网模型 附录. 导读. 通过本章的学习,你应该能够: 1. 了解需求供给分析的三个组成部分:需求、供给和市场均衡;了解影响需求和供给的因素;区分需求与需求量的变动、供给与供给量的变动。 2. 掌握需求的价格弹性、需求的收入弹性、需求的交叉价格弹性和供给的价格弹性等概念和计算。 3. 掌握不同的弹性对经济主体决策的影响。 4. 熟练掌握蛛网模型的三种形式及其图形分析。

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第 2 章 供给和需求的基本原理

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2

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A. St=3Pt-5Dt=9-2Pt B. St=7Pt-20Dt=10-21Pt

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B

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A


2

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1Qd = QsP=6Q=480.250.375

255Qs=30+3P-5Qd = QsP*=9Q*=425Q*=210P*-P=9-6=35-3=2


2

10.P=fQQP

Q1P1Q2P2P/QEd1= -P1/Q1 Q/P

Ed2= -P2/Q2 Q/PP/Q

2


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