华东师范大学2000年西方经济学金融学国贸考研试题.pptVIP

Chapter 3 Elasticity and Demand Market Demand Curve Determinants of demand Concepts of elasticity Elasticity estimates the extent to which one variable is likely to respond to anther variable’s change. And the degree of elasticity can be measured by gauging the percentage changes of this two variables. p81 Classification of elasticity Price elasticity of demand Price elasticity of demand (Ed) measures the responsiveness of quantity demanded of a product to changes in its own price. Coefficient of Ed: .demand elasticityA measure of the responsiveness of consumers to changes in the price of a good. coefficient of demand elasticity (E)The percentage change in quantity demanded, divided by the percentage change in price. E is always a negative number because P and Q are inversely related. The elasticity of demand is the ratio of the percentage change in quantity demanded to the percentage change in the price of the good. p83 Over a specified price range, demand is said to be either elastic, unitary elastic, or inelastic according to whether the absolute value of the elasticity coefficient is greater than, equal to, or less than one, respectively. elasticSegment of demand for which E 1. inelasticSegment of demand for which E 1. unitary elasticSegment of demand for which E = 1. In the case of linear demand, moving down the demand curve causes the absolute value of the demand elasticity to get smaller. 华东师范大学2000年西方经济学[金融学/国贸]考研试题 7.民航机票经常价格打折说明飞机旅行需求（ ）A.富有价格弹性 ? B.单位弹性 ? C.价格弹性不足 ? D.缺乏收入弹性 上海财经大学1998年西方经济学试题 二．选择题：请在标准答题纸上作单项选择（每小题1.5分，共45分） 3． 某商品价格从10元下降到9元，需求量从70增至75，该商品需求 ?A. 缺乏弹性 B. 富有弹性 C. 单位弹性 D. 弹性不能确定 3.A TR1=10*70=700,TR2=9*75=675，总收益因为价格的下降而下降，所以Ed1 to韣吠噼4 上海财经大学1999年西方经济学考研试题 3 ． ? 直线型需求曲线的斜率不变，因此其价格弹性也不变，这种说法 ?A. 一定正确 ? ? ? B. 一定不正确 , ?C. 可能不正确 ? ? D. 无法判断是正确不正确 ? 四．简答题（每小题 6 分，共 30 分） ?4 ． ? 设汽油的需求价格弹性为－ 0.15 ，其价格现为每加仑 1.2 美元，试问汽油价格上涨多少才能使其消费量减少 10% ？ 3.C 考察特殊的直线型需求曲线，包括水平，竖直和交X和Y轴等三种 ? n?? 上海财经大