Content Public goods Subscription -Efficient provision of public goods Public choice · Externality -What' s externality? - How to solute it? -What' s the efficient condition with externality

Content The“core Uniqueness of equilibrium Stability of equilibrium · Welfare

Content Pure exchange system The existence of Walrasian equilibrium The first theorem of welfare economics The second theorem of welfare economics Exchange with production

浙江工业大学：《微观经济学》课程教学资源（PPT课件）05 成本理论

Optimization See Sydsaeter(2005, Chapters 2, 3)and Chiang(1984, Chapters 9, 11, 12 and 21) Positive definite matrix Definite matrices are directly related to optimization. A symmetric matrix A is positive semi- definite(A≥0) if rAr≥0,Vx; positive definite(A>0)

第一节 厂商收益和利润 第二节 完全竞争市场价格和产量的决定 第三节 完全垄断市场价格和产量的决定

Equilibrium price. Equilibrium allocation: x=xi(p,p·w2), Note: A p* for any >0 is also an equilibrium price. Offer curve: (p)(p, p. w;). The equilibrium is the intersection point of the offer curves. Excess demand function:

(1)i(p, u) is zero homogeneous in p (2) substitution matrix: Dpi(p, u)<0 (3)symmetric cross-price effects: 23i(p 2=2z(p, u) (4) decreasing:=n≤0

◼ 第一节 垄断竞争市场价格和产量的决定 ◼ 第二节 寡头垄断市场价格和产量的决定 ◼ 第三节 产业政策

本章要点 一、完全垄断的短期均衡 二、三度价格歧视 三、福利三角形 四、对垄断的管制