西方经济学第6章附录.pdfVIP

Appendix: Indifference Curves A.1 An Indifference Curve Assumptions that consumer tastes satisfy Completeness assumption （完全性） Transitivity assumption （可传递性） Nonsatiation assumption （非饱和性） Microeconomics, Zheng Yafei, 4/24/2006 SEM, SWJTU 1 An Indifference curve （无差异曲线）is a line shows combinations of goods among which a consumer is indifferent. The curve is graphed showing the quantity of one good on one axis and the quantity of another good on the other axis. Microeconomics, Zheng Yafei, 4/24/2006 SEM, SWJTU 2 1 Microeconomics, Zheng Yafei, 4/24/2006 SEM, SWJTU 3 A Consumer’s Indifference Curve A Consumer’s Indifference Curve Apple Pear Combinations （X ） （X ） 1 2 A 1 10 B 2 6 C 3 4 D 4 2.5 Microeconomics, Zheng Yafei, 4/24/2006 SEM, SWJTU 4 2 Tina’s Preference Map Tina’s Preference Map The indifference curve in part (a) is curve I1 in part (b). Tina is indifferent between points C and G. Microeconomics, Zheng Yafei, 4/24/2006 SEM, SWJTU 5 A.2 Marginal Rate of Substitution The marginal rate of substitution (MRS) （边际替代率） is the rate at which a person will give up Good X2 to get more of Good X1 and at the sa