第六章 需求与消费者剩余.ppt

6.1 Endowments in the Budget Constraint 6.1 Endowments in the Budget Constraint 6.1 Endowments in the Budget Constraint 6.1 Endowments in the Budget Constraint 6.2 Homothetic Utility Functions 6.2 Homothetic Utility Functions 6.3 Aggregating Across Goods 6.3 Aggregating Across Goods 6.3 Aggregating Across Goods 6.3 Aggregating Across Goods 6.4 Aggregating Across Consumers 6.4 Aggregating Across Consumers 6.4 Aggregating Across Consumers 6.4 Aggregating Across Consumers 6.4 Aggregating Across Consumers 6.4 Aggregating Across Consumers 6.4 Aggregating Across Consumers 6.4 Aggregating Across Consumers 6.5 Inverse Demand Function 6.5 Inverse Demand Function 6.5 Inverse Demand Function 6.6 Consumer’s Surplus 6.6 Consumer’s Surplus 6.6 Consumer’s Surplus 6.6 Consumer’s Surplus 6.6 Consumer’s Surplus 6.7 Quasilinear Utility (拟线性效用 ) 6.7 Quasilinear Utility (拟线性效用 ) 6.8 Integrability Problem (可积性问题) 6.8 Integrability Problem (可积性问题) 6.9 Money metric utility 6.9 Money metric utility 6.10 Consumer Surplus in general 6.10 Consumer Surplus in general Integrability equations: Solution: Therefore (!), for any change p→q, * Lecture 6 Demand and Consumer Surplus Xiong Qiquan 2005/11/3 The consumer income is The net demand for good i is xi-wi. Using Slustky equation,the first term can be expanded as In the above model prices influence the value of what the consumer has to sell as well as the value of what the consumer wants to sell. The income effect depends on the net demand for good j rather than the gross demand. If the good in question is a normal good. When its price of the goes up, the substitution effect and the income effect both push towards reduced consumption. But suppose that this consumer is a net seller of this good. Then his actual income increases and this additional endowment income effect may actually lead to an increase in consumption of the good. Labor supply Slutsky’s equation allows us to calculate