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微观经济学第六讲-市场失灵理论-精简版PPT课件

微观经济学第六讲-市场失灵理论-精简版PPT课件

思考:用耕地和牧场(公共地的悲剧)案例来拓展
科斯定理。
22ቤተ መጻሕፍቲ ባይዱ
5.不完全信息 incomplete information
完全信息:消费者与厂商在任何时点都能了解市场 各种商品的供求状态。传统的新古典经济学的关于市 场参与者拥有的完全信息的假设与现实情况是相违背 的。 不完全信息:现实经济中,信息常常是不完全的, 即由于知识能力的限制,人们不可能知道在任何时候、 任何地方发生和将要发生的任何情况。而且,在相对 意义上,市场经济本身不能生产出足够的信息并有效 地配置它们。市场机制因此会失灵。
第六讲 市场失灵和政府干预
市场失灵 自然垄断(含义、效率评价、解决思路) 外部效应(含义、效率评价、解决思路) 公共物品(含义、效率评价、解决思路) 信息不对称(含义、道德风险、逆向选择)
参考资料: 曼昆《经济学原理》 第10、11、15、22章
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1. 市场失灵 market failure
生产的负外部性:生产者的行为给他人造成了损害, 但没有给他人予以补偿。如造纸厂的三废。
消费的负外部性:消费者的行为给他人造成了损害, 但没有给予补偿。如吸烟、三更半夜唱歌。
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(1)
外部成本
(2)
外部收益
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(3)
(4)
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(3)外部性与资源配置的失当
外部经济对外带来的好处无法得到回报,具有外部经 济的物品供应不足,如教育和新技术。 物品消费或生产收益<应当得到的收益(社会收益); 即物品消费或生产成本>应当支付成本(社会成本)。
公共物品:警报器、国 防、不拥挤的不收费道 路、乡间道路
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公共物品
公共物品:既无排他性,又无竞争性的物品。 例如:国防,基础知识,不拥挤的不收费道路,反贫

微观经济学_07不完全竞争

微观经济学_07不完全竞争
★现代经济博奕理论始于1944年冯·诺依曼(John Von Neumann)和莫根施特恩(Oskar Margenston)的《博奕论与经济行为》一书。
★博奕:多人决策过程
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博奕论的基本要素
★一些基本概念 参与者(player)(博奕方、局中人、对局 者) 策略(strategy)与策略空间(strategy set) 结局(outcome) 报酬(payoff)(支付)与报酬函数(payoff function):报酬矩阵(支付矩阵、得益矩 阵、赢得矩阵) 均衡(equilibrium)
★三级价格歧视
P
三级价格歧视:指指垄 断厂商对同一产品在不同 市场上收取不同的价格, 或者对不同的消费者群体 收取不同的价格。首先要 有两个以上的市场,两个 市场可以有效分割,且需 求弹性不同。
P1
A
MC
B P2
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D2
MR1 MR2 D1
MRT
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Q1 Q2
QT
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垄断厂商的三级价格歧视
★要实现利润最大化的条件应该是在两个市场上出售产品
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垄断竞争市场的特点
★存在产品差别(product differentiation) ★厂商进出行业比较容易 ★存在较多的厂商。
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垄断竞争厂商的需求曲线
★相对于完全竞争厂商而言要更陡一些,即更 缺乏弹性;
★相对于垄断厂商来讲需求曲线要更缓,即更 富有弹性。
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垄断竞争厂商的需求曲线
★d曲线 :单个厂商改变价格,其它厂商保持不 变时,该厂商的需求曲线 。斜率较小,称为 主观需求曲线。
P πA
PO
P
MCA ACA PO
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QA
QO

经济学:微观经济分析(一)

经济学:微观经济分析(一)

经济学:微观经济分析(⼀)缁忔祹瀛︼細寰缁忔祹鍒嗘瀽(涓€)(鎬诲垎锛?5.00锛屽仛棰樻椂闂达細90鍒嗛挓)涓€銆亄{B}}鍗曢」閫夋嫨棰榹{/B}}(鎬婚鏁帮細55锛屽垎鏁帮細55.00)1.Income elasticity is defined as the:A. percentage change in income divided by the percentage change in the quantity demanded.B. change in quantity demanded divided by the change in income.C. percentage change in the quantity demanded divided by the percentage change in income.锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛欼ncome elasticity is defined as the percentage change in quantity demanded divided by the percentage change in income. Normal goods have positive values for income elasticity and inferior goods have negative income elasticities.2.According to the "invisible hand" principle, which of the following statements is least accurate?A. Competitive markets produce an optimal basket of goods and services.B. Efficient allocation of productive resources occurs through competition.C. The authority of the state, although not seen, must always be present in the market.锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛歍he "invisible hand" to which Adam Smith referred in The Wealth of Nations did not include any legal authority. Rather, Smith was describing the way that individual producers serve society's interest by competing with one another to produce the goods and services that are valued most highly by final consumers, even though the producers do not have society's interest explicitly in mind.3.Product differentiation is the greatest source of market power for which of the following market structures ?A. Perfect competition.B. Oligopoly.C. Monopolistic competition.锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛歅roduct differentiation gives market power to firms under monopolistic competition by making the firm the sole producer of a slightly differentiated good.4.Suppose that the demand curve for honey shifts such that the equilibrium price for a pound of honey increases from $ 7 to $ 9 per pound. At the new equilibrium, the quantity supplied increases from 500 pounds per month to 600 pounds per month, although the supply curve has not shifted. The elasticity of supply for honey is closest to:A. +0.91.B. +0.73.C. +1.12.锛堝垎鏁帮細1.00锛?/div>A.B. 鈭?/span>C.D.瑙f瀽锛歍he average quantity of honey supplied is (500+600)/2=550 pounds, and the average price of honey ($7+$9)/2=$8 per pound. So, the percentage change in quantity is (600-500)/550=18.18% and the percentage change in price is (9-7)/8=25.00%. Thus, the elasticity of supply is 18.18/25.00=+0.73.5.Which of the following statements about the elasticity of demand is least accurate?A. The most important determinant of price elasticity of demand is the availability of substitutes.B. Prices are more elastic in the long run than in the short run.C. When demand is inelastic, an increase in price will cause a decrease in the total expenditure on a good.锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛欼f demand is inelastic, the age change in quantity demanded is smaller than the age change in price; quantity demanded is relatively unresponsive to price changes. A price increase increases total expenditures on a good.6.Which of the following is least likely to be the result of a minimum wage?A. Unemployment will rise.B. There will be an abundance of low-skilled workers willing to work.C. Labor will be substituted for capital.锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛欶irms substitute capital for the "expensive" labor and use more than the economically efficient amount of capital. /doc/828e9b3afd00bed5b9f3f90f76c66137ee064f27.html pared to normal markets, the existence of fraud and the use of violence in black markets generally leads to:A. poorer economic efficiency.B. superior economic efficiency.C. lower profit rates for sellers.锛堝垎鏁帮細1.00锛?/div>A. 鈭?/span>B.C.D.瑙f瀽锛欶raud and violence lead to a lower level of economic efficiency in black markets. The black markets operate less smoothly. The sellers that are not caught can charge a higher price for the risks they take and earn a higher profit rate.8.Which of the following is least likely to be the long-run effect of a price ceiling that is set below the equilibrium price?A. Sellers take bribes.B. Suppliers discriminate.C. Sellers improve quality.锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛歎nder price ceilings, sellers may reduce the quality of goods to a level that reflects the imposed ceiling price.9.A columnist is discussing how the efficient quantity of output for a good or service is determined. These two statements appear in his column:Statement 1: The equilibrium quantity of production for a good or service can be considered efficient as long as the marginal social benefit of that quantity is greater than its marginal social cost.Statement 2: Subsidies and quotas typically result in production of a good or service in quantities at which the marginal social cost exceeds the marginal social benefit.Are these statements correct?Statement 1 Statement 2鈶燗. Correct Correct鈶. Correct Incorrect鈶. Incorrect IncorrectA. 鈶?B. 鈶?C. 鈶?/LI>锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛歋tatement 1 is incorrect. The efficient quantity of output is the quantity at which the marginal social benefit (demand) is equal to the marginal social cost (supply). Statement 2 is also incorrect. Subsidies typically lead to overproduction, where the marginal social cost at the quantity produced is greater than the marginal social benefit. Quotas, however, typically limit production to a level below equilibrium, such that the marginal social benefit at the quantity produced is greater than the marginal social cost.10.For which the following four-firm concentration ratios and Herfindahl-Hirschman indexes (HHI) indicates a highly competitive market?Four-Firm Ratio HHI鈶燗. 5% 150鈶. 98% 9500鈶. 98% 150A. 鈶?B. 鈶?C. 鈶?/LI>锛堝垎鏁帮細1.00锛?/div>A. 鈭?/span>B.C.D.瑙f瀽锛欶or both the four-firm ratio and the HHI, the lower the market concentration measure, the greater the degree of competition.11.In a regulated industry, the introduction of a marginal cost pricing role that maximizes total surplus would most likely be viewed as:A. inefficient but leaves the natural monopoly incurring an economic loss.B. inefficient and allows the natural monopoly to realize an economic gain.C. efficient but leaves the natural monopoly incurring an economic loss.锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛欰 marginal cost pricing rule sets price equal to marginal cost. It is efficient but leaves the natural monopoly incurring an economic loss. Because, with an increase in output the average total cost falls, resulting in marginal cost being less than the average cost.12.Which of the following most accurately describes the impact of a price ceiling set below the equilibrium price for a good and a minimum wage set above the equilibrium wage? Price ceiling Minimum wage 鈶燗. Shortage Decreased unemployment 鈶. Surplus Increased unemployment 鈶. Shortage Increased unemployment A. 鈶燘. 鈶. 鈶?br/>锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛欰 ceiling that is below the equilibrium price for a good will result in a shortage characterized by a quantity demanded that is greater than the quantity supplied. A minimum wage leads to increased unemployment as firms tend to substitute capital for labor. Even though there are often a large number of unemployed low-skilled workers who may be willing to work at a wage lower than the minimum wage, firms cannot legally hire them.13.The production of a rock concert is an example of which type of organization of an economic activity?A. Finn coordination.B. Market coordination.C. Economic coordination.锛堝垎鏁帮細1.00锛?/div>A.B. 鈭?/span>C.D.瑙f瀽锛歁arket coordination occurs when a firm employs resources outside the firm more efficiently than if they relied only on internal resources. An example is through the coordination of more than one market such as the production of a rock concert which involves many different markets ( e. g. marketing, vending, musicians, security, facilities procurement, etc. ).14.If accurately calculated, will the amount of accounting profit for a firm generally: be below that firm's economic consider both that firm's profit for the same time period?explicit and implicit costs? 鈶燗. No No 鈶. No Yes 鈶. Yes No A. 鈶?B. 鈶. 鈶?br/>锛堝垎鏁帮細1.00锛?/div>A. 鈭?/span>B.C.D.瑙f瀽锛歄pportunity cost is the return that a firm's resources could have earned elsewhere in their next most valuable use. Opportunity cost includes both explicit and implicit costs. Explicit costs are observable, measurable expenses such as the dollar cost of production inputs and the interest cost of renting (borrowing) capital. Implicit costs are notexplicitly observable and fall into two categories : (1) the opportunity cost to a firm of using its own capital and (2) the opportunity cost of the time and financial resources ofthe firm's owners. Economic profit considers both explicit and implicit costs. When thefirm's revenues are just equal to its opportunity costs (explicit and implicit costs, including a normal profit) , economic profits are zero. Accounting profit considers only explicit costs but not implicit cost and normally exceed economic profit.15.If quantity demanded declines 20 percent when incomes fall 3 percent, this good is:A. a luxury good.B. a necessity.C. an inferior good.锛堝垎鏁帮細1.00锛?/div>A. 鈭?/span>B.C.D.瑙f瀽锛欼ncome elasticity is the sensitivity of demand to changes in consumer income. Income elasticity for this good = (percent change in quantity demanded)/(percent change in income)=-20/-3=6.7. Normal goods with high income elasticities (absolute values锛?) are considered luxury goods, a type of normal good that experiences a greater percentageincrease in demand than the percentage increase in income.16.Which of the following statements about price elasticity is most likely FALSE?A. The elasticity of demand of a good increases over time.B. If the price of gasoline increases, total expenditures on gasoline will increase.C. If the price of a brand of toilet paper increases, total expenditure on that brand of toilet paper will increase.锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛欰 particular brand of toilet paper likely has elastic demand because there are many available substitutes. The existence of many substitutes indicates elastic demand. When good substitutes for a product are available, a price rise induces many consumers to switch to other products. Thus, if the price of a brand of toilet paper increases, total expenditure on that brand will likely decrease as consumers substitute cheaper brands. The mostimportant determinant of the price elasticity of demand is the availability of substitutes. The other statements are true. The second law of demand suggests that in general, when the price of a product increases, consumers take time to reduce their consumption. Thus, demand decreases by a larger amount in the long run than in the short run. The demand for gasoline is likely inelastic. Thus, when price increases, the percentage change in quantity demandedis less than the change in price (and total expenditures on the good increase). The demandfor an individual firm is more elastic than the demand for the entire market.17.A minimum wage is an example of which of the following?A. A price ceiling.B. A quota.C. A price floor.锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛欰 minimum wage is an example of a price floor.18.Because copper producers are allowed to release harmful chemicals into the air, the industry supply curve is not the marginal social cost curve. Given this situation and a copper market that is otherwise competitive, copper producers willA. produce less than the efficient amount of copper, an example of the "free rider"problem.B. produce less than the efficient amount of copper, resulting in a dead weight loss from underproduction.C. produce more than the efficient amount of copper, resulting in a deadweight loss from overproduction.锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛歋ince some of the societal costs of copper production are not considered by the copper producers, the marginal social cost curve lies above the industry supply curve and equilibrium copper production is greater than the efficient level of output. This results in a deadweight loss from overproduction. The "free rider" problem arises when consumers can enjoy the benefit of public goods without paying anything towards their production.19.Which of the following most accurately describes society's allocation of resources to the production of goods with external costs or external benefits?External costs External benefits鈶燗. Over-allocation Over-allocation鈶. Under-allocation Under-allocation鈶. Over-allocation Under-allocationA. 鈶?B. 鈶?C. 鈶?/LI>锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛欵xternal costs are costs associated with the production of goods which are not entirely borne by producers. The industrial pollution of fishing waters decreases the yield to the fishing industry. However, the lost revenue to the fishing industry is not considered a cost to the firms generating the pollution. The result is an over-allocation of resources to the production of goods made by the firms generating the pollution. External benefits refer to benefits received by those other than the buyers of a good. Scenic gardens and fountains built by private enterprises for their own interests are examples of goods with external benefits. Since the marginal benefit to society is greater than that of the marginal cost to the producer, less than the efficient quantity is produced.20.Which of the following is least likely to be considered an obstacle to the efficient allocation of an economy's resources?A. Rent controls.B. Minimum wages.C. Changes in consumer tastes.锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛歅rice controls and taxes are obstacles to allocative efficiency. Rent controls and minimum wages are examples of price controls. As opposed to being obstacles to the efficient allocation of resources, changes in consumer tastes lead to the reallocation of society's resources, producing a different mix of goods or services that provide increased benefits.21.Thompson Industries has the following short-run cost structure per level of production output:Output Units (Q) Total Costs (TC) Fixed Costs (FC)30000 $ 240000 $1200050000 $ 360000 $1200070000 $ 480000 $1200090000 $ 570000 $12000Based on the above and assuming a sales price of $10 per unit, what is the marginal cost per unit if the Company's output is increased from 50000 units to 70000 units?A. $6.86B. $6.00C. $4.60锛堝垎鏁帮細1.00锛?/div>A.B. 鈭?/span>C.D.瑙f瀽锛歔*]22.Economics commentator Gail Brythe is discussing the different factors that influence the elasticity of supply. She states the following: Statement 1: Elasticity of supply is greater when a good or service can only be produced with unique or rare inputs. Statement 2: Typically, a good's momentary supply elasticity is higher than its short-run supply elasticity, which in tuna is higher than its long-run supply elasticity. Are Brythe's statements correct? Statement 1 Statement 2 鈶燗. Correct Correct 鈶. Correct Incorrect 鈶. Incorrect Incorrect A. 鈶燘. 鈶. 鈶?br/>锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛欱oth statements are incorrect. Elasticity of supply ( i. e. , the responsivenessof the supply of a good to changes in its price) is low when a good can only be produced with rare or unique inputs, because the potential output of the good is constrained by the availability of those inputs. Supply elasticity is lowest in the momentarytime frame because producers typically cannot change the output of a good immediately. Supply becomes more elastic as the time frame increases because long-run adjustments in capital investment and technology lead to greater changes in profit maximizing output levels.23.The short run is best defined as:A. the period for which the quantities of all factors of production are fixed.B. a period of less than one year.C. the period for which the quantities of some resource inputs are fixed.锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛歍he short run is typically defined as the period for which the quantities of some, but not all, resources are fixed. Working capital is the difference between a firm's current assets and current liabilities and consists of items (such as cash) that the firm can adjust in the short run.24.Producer surplus is most accurately defined as the.A. difference between the opportunity cost of producing the last unit of a good or service and the price received for that unit.B. sum of the differences between the marginal benefit and the marginal cost for each unit of good produced and consumed over the total number of units produced and consumed.C. sum of the differences between the price received for each unit of good produced and the opportunity cost of each unit.锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛歅roducer surplus is the sum of the differences between the price received for each unit of good produced and the opportunity cost of each unit, for the total units produced. Producer surplus results when the market price for a good or service exceeds the marginal cost producing it.25.Which of the following concentration ratios are most likely to be associated with a perfectly competitive industry?Four-firm concentration ratio Herfindahl-Hirschman Index鈶燗. 125 1000鈶. 85 25鈶. 25 100A. 鈶?B. 鈶?C. 鈶?/LI>锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛歍he four-firm concentration ratio can range from zero to 100 percent. The Herfindahl-Hirschman Index has a theoretical range of near zero to 10000. As the level of competition increases, the value of either of the concentration measures decreases. A perfectly competitive market is a market characterized by relatively low concentration measures.26.When household incomes go down and the quantity of a product demanded goes up, the product is:A. an inferior good.B. a necessity.C. a luxury good.锛堝垎鏁帮細1.00锛?/div>A. 鈭?/span>B.C.D.瑙f瀽锛歐hen household incomes go down and the quantity demanded of a product goes up, the product is an inferior good. Inferior goods include things like bus travel and margarine. 27.Which of the following statements regarding diminishing marginal returns is most accurate?A. As the quantity produced rises, costs begin to rise at a decreasing rate.B. As the quantity produced falls, costs begin to rise at a decreasing rate.C. As the quantity produced rises, costs begin to rise at an increasing rate.锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛欰t production levels that are consistent with decreasing marginal returns, costs will increase at an increasing rate as production rises.28.Consider two markets; one has a Herfindahl-Hirschman Index (HHI) of 50, while the other has a four-firm concentration ratio equal to 2%. Which of the following statements most accurately describes these two markets?A. Both of these markets are monopolies.B. The market with the HHI equal to 50 is very competitive, while the other market has low competition.C. Both markets are highly competitive.锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛欰n HHI concentration measure of 50 is very low, indicating a high degree of competition. A four firm concentration ratio of 2% indicates a high level of competition. For both the four-firm ratio and the HHI, the higher (lower) the concentration measure, the lower (greater) the degree of competition.29.If marginal cost is above the average cost, when you produce your next unit:A. average cost will decline.B. marginal cost will remain unchanged.C. average cost will increase.锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛欼f marginal cost is above the average cost, when you produce your next unit, average cost will increase. Because marginal cost is the cost of producing the next unit, and because this cost is above the firm's average cost per unit, the average cost per unit must increase, if only slightly. Based on the information provided in the question, there is no way to know what will happen to the marginal cost of future units produced.30.Christine Dobbs is watching a public affairs television program on which one of the participants makes the following Statements:Statement 1: A common resource is an obstacle to the efficient allocation of resources unless it generates external benefits. Statement 2: The idea of utilitarianism suggests that market allocation of resources doesnot maximize the value of an economy to all individuals. However, achieving the results that utilitarianism regards as optimal involves a loss of economic output.Should Dobbs agree or disagree with these statements?Statement 1 Statement 2鈶燗. Disagree Agree鈶. Agree Agree鈶. Agree DisagreeA. 鈶?B. 鈶?C. 鈶?/LI>锛堝垎鏁帮細1.00锛?/div>A. 鈭?/span>B.C.D.瑙f瀽锛欳ommon resources and external benefits both represent obstacles to the efficient allocation of resources. Common resources tend to be overused and external benefits suggest that less than the efficient quantity is produced. Utilitarianism is the idea that fairness means all individuals own the same amount of resources. To bring about such an outcome would require transferring wealth from high income earners to low income earners. This wouldresult in high income earners working less, so the economy would produce less wealth overall. The time and effort requiredto transfer the wealth would also divert resources from productive uses.31.Which of the following factors of production is least likely to be fixed in the short run?A. Capital equipment.B. Labor.C. Plant size.锛堝垎鏁帮細1.00锛?/div>A.B. 鈭?/span>C.D.瑙f瀽锛歀abor is typically assumed to be variable in the short run.32.Fred Heyach and Gord Murdoll are discussing whether or not competitive markets use resources efficiently. Heyach says, "Competition must lead to the efficient allocation of resources. Consumers are willing to pay more for the goods they want most, so producers of those goods can outbid other producers for the resources to make them. Murdoll replies, "At any one point in time the market might allocate resources efficiently given consumers' preferences, but as consumers change their minds about which goods they want, the allocation of resources becomes inefficient. " Are these statements correct or incorrect?Heyach Murdoll鈶燗. Correct Incorrect鈶. Incorrect Correct鈶. Incorrect IncorrectA. 鈶?B. 鈶?C. 鈶?/LI>锛堝垎鏁帮細1.00锛?/div>A. 鈭?/span>B.C.D.瑙f瀽锛欻eyach's statement is correct but Murdoll's statement is incorrect. Competitive forces adjust the allocation of resources to changes in consumer preferences. If consumers' demand for a product decreases, the resources that were being used to produce it are diverted to the production of other goods that are in greater demand.33.Matthew Reeves is listening to a discussion on how resources move to the most efficient allocation. Two of the participants make these statements:Statement 1: When resources are diverted from beer production to wine production, this represents an inefficient allocation from the perspective of the beer producers.Statement 2: Market allocation of resources tends toward efficiency because the value of what a resource can produce determines its allocation in production.Should Reeves agree or disagree with these statements?Statement 1 Statement 2鈶燗. Disagree Agree鈶. Agree Agree鈶. Agree DisagreeA. 鈶?B. 鈶?C. 鈶?/LI>锛堝垎鏁帮細1.00锛?/div>A. 鈭?/span>B.C.D.瑙f瀽锛歊eeves should disagree with Statement 1. In the competitive market, resources are diverted away from goods for which final consumer demand is decreasing, and toward the production of goods for which final consumer demand is increasing. If the market isdiverting resources from producing beer to producing wine, it is because consumers have changed their decisions and begun offering more money for wine and less for beer. This means beer brewers are producing more than consumers demand and generating losses on the excess production. They will maximize their profits by reducing their production and using fewer resources. Thus, the new allocation of resources is efficient even from the point of view of the beer producers. Reeves should agree with Statement 2. The market constantly reallocates productive resources to uses where what they produce is valued more by final consumers, andremoving them from uses where what they produce is valued less. When there are no obstacles, resources are always moving toward their most efficient(value maximizing) allocations.34.Equilibrium in a perfectly competitive market results in a quantity for which the:A. difference between consumer and producer surpluses is maximized.B. consumer and producer surpluses are equal.C. sum of consumer and producer surpluses is maximized.锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛欼n a competitive market, the equilibrium quantity is the one tot which the sum of the consumer and producer surpluses is maximized.35.The price of product Z decreased from $ 2.50 per unit to $ 2.00 per unit. Since the price decreased, demand has gone up from 3 million units to 4 million units. Calculate the price elasticity of demand and determine if the demand is elastic or inelastic.Price elasticity of demand Elasticity鈶燗. - 1.29 inelastic鈶. - 2.00 inelastic鈶. - 1.29 elasticA. 鈶?B. 鈶?C. 鈶?/LI>锛堝垎鏁帮細1.00锛?/div>A.B.C. 鈭?/span>D.瑙f瀽锛歱ercentage change in quantity =(4-3)/[(4+3)/21=0.286=28.6% percentage change in price =(2-2.5)/[(2+2.5)/2]=-0.222=-22.2% 28.6%/-22.2%=-1.29 Since the price elasticity of demand is greater than 1 ( ignore the sign) , product Z is elastic.36.Which of the following two factors are most likely to be considered variable during the short run?A. Labor and technology.B. Labor and raw materials.C. Raw materials and technology.锛堝垎鏁帮細1.00锛?/div>A.B. 鈭?/span>C.D.瑙f瀽锛歄f the sets of factors listed, the two that are typically considered variable in the short run are labor and raw materials.37.Which of the following statements least accurately describes why firms can coordinate economic activity more efficiently than markets? Firms can achieve:A. economies of scope.B. diversification benefits.C. economies of scale.锛堝垎鏁帮細1.00锛?/div>A.B. 鈭?/span>C.D.瑙f瀽锛欶irms can often coordinate economic activity more efficiently than markets because firms can reduce the costs of market transactions, and they can achieve economies of scale, scope, and team production.38.Which of the following most accurately describes the typical relationship between marginal product (MP) and average product (AP) ? As the quantity of labor increases:A. initially, AP 锛?MP, then AP = MP, then AP 锛?MP.B. initially, AP = MP, then AP 锛?MP.。

中级微观经济学英文课件 (3)

中级微观经济学英文课件 (3)

Extreme CaLeabharlann es of Indifference
Curves; Perfect Substitutes
u If a consumer always regards units of commodities 1 and 2 as equivalent, then the commodities are perfect substitutes and only the total amount of the two commodities in bundles determines their preference rank-order.
the or
statement x
y
thf~atyeither f~ x.
Assumptions about Preference Relations
u Reflexivity: Any bundle x is always at least as preferred as itself; i.e.
u Particularly, they are ordinal relations; i.e. they state only the order in which bundles are preferred.
p p
Preference Relations
u denotes strict preference; x y means that bundle x is preferred strictly to bundle y.
x f~ x.
Assumptions about Preference Relations
u Transitivity: If x is at least as preferred as y, and y is at least as preferred as z, then x is at least as preferred as z; i.e.

萨缪尔森18版微观经济学原理笔记

萨缪尔森18版微观经济学原理笔记

Unit11)经济学economics 研究的是一个社会如何利用稀缺的资源生产有价值的商品,并将它们在不同的人中间进行分配2)经济学两大核心思想:物品和资源是稀缺的,社会必须有效地加以利用两大主题稀缺和效率3)经济品economic goods4)稀缺scarcity 相对于需求,物品总是有限的5)效率efficiency 最有效地利用社会资源以满足人类的愿望和需要在不会使其他人境况变坏的前提下,如果一项经济活动不再有可能增进任何人的经济福利,则该项经济活动就被认为是有效率的6)经济学的精髓之一承认稀缺性是一种现实存在,并探究一个社会如何进行组织才能最有效地利用其资源7)微观经济学microeconomics 主要研究作为单个实体的市场、企业、家庭的行为;宏观经济学macroeconomics 研究经济的总体运行二者共同构成现代经济学的核心8)科学方法scientific approach计量经济学econometrics后此谬误the post hoc fallacy不能保持其他条件不变failure to hold other things constant合成谬误the fallacy of composition9)经济学的最终目的:改善人们的日常生活条件10)经济组织的三个经济问题:生产什么,如何生产,为谁生产生产什么和生产多少,如何生产,为谁生产11)实证经济学(positive economics)经济社会的事实规范经济学(normative economics)涉及价值判断12) 配置稀缺资源的制度和机制市场经济market economics 主要由个人和私人企业决定生产消费的经济制度自由放任经济laissez-faire 政府不对经济决策施加任何影响指令经济command economics 政府作出有关生产和分配的所有重大决策混合经济mixed economics 既带有市场经济的成分也带有指令经济的成分13)投入inputs 生产物品和劳务的过程中使用的物品或者劳务;另一个名称为生产要素factors of production土地自然资源,生产过程中大自然赋予人的礼物劳动人们花费在生产过程中的时间和精力资本一个经济体为了生产其他的物品而生产出来的耐用品专业化的资本品积累是经济发展必不可少的要素产出outputs 生产过程中创造的各种有用的物品或者劳务产出什么,产出多少?如何产出?为谁生产和分配这些产出?14)生产可能性边界production-possibility frontier PPF在知识技术和可投入品数量既定的条件下,一个经济体所能得到的最大产量。

微观经济学第二章总结

微观经济学第二章总结

微观经济学第二章总结微观经济学又称个体经济学,小经济学,是宏观经济学的对称。

以下是小编整理的微观经济学第二章总结,希望对大家有所帮助。

效用:是指人们对商品或劳务满足其欲望能力的评价,即消费者在消费商品或劳务时所感受到的满足程度。

边际效用递减规律:基数效用论的基本假定,是指在一定时期内,在其他商品的消费数量保持不变的条件下,随着消费者对某种商品消费量的增加,消费者从该商品连续增加的每一消费单位中所得到的效用增量(即边际效用)是递减的。

消费者均衡:是指在消费者收入及商品价格既定的条件下,消费者效用达到最大并且不再变的一种状态。

条件是MU1/P1=MU2/P2=λ和P1X1+P2X2=m。

消费者均衡点即为无差异曲线与预算约束线的切点。

预算约束线:是指消费者收入和商品价格既定的条件下,消费者的全部收入所能购买到的各种商品的不同数量的组合,假定消费者只消费两种商品,收入为m,则预算约束线方程为P1X1+P2X2=m,在图形中它是一条直线。

无差异曲线:是指可以给消费者带来相同满足程度的不同商品的各种数量组合描绘出来的轨迹。

在一条无差异曲线上,商品的不同数量组合对消费者而言是无差异的,通常具有特点:(1)任意两条无差异曲线都不会相交;(2)无差异曲线有无数条,每一条代表着一个特定的效用等级,并且离原点越远,所代表的效用等级就越高:(3)无差异曲线向右下方倾斜;(4)无差异曲线凸向原点。

商品的边际替代率:在效用水平保持不变的条件下,消费者增加一单位某商品的消费时所放弃的另一种商品的消费数量。

以MRS代表商品的边际替代率,则商品1对商品2的边际替代率可以表示为: MRS1,2=-△X2/△X1,边际替代率的几何意义是无差异曲线斜率的绝对值。

随着第一种商品数量的增加,边际替代率呈递减趋势。

替代效应:在保持效用不变的条件下,由一种商品价格变动从而两种商品的相对价格变动而引起的一种商品对另一种商品的替代被称为价格变动的替代效应。

《微观经济学》ppt课件-07-不完全竞争市场

《微观经济学》ppt课件-07-不完全竞争市场
线的横轴截距时需求曲线横轴截距的一半。
pp R d T R d (P Q ) P Q d P P ( 1 d P Q ) P ( 1 1 ) d Qd Q d Q d Q P e d
d d T P R d (P d P Q ) Q P d d Q P Q ( 1 d d Q P Q P ) Q ( 1 e d )
ppt课件
9
总收益、边际收益、价格与需求弹性 的关系
当│ed│>1时,边际收益>0,总收益与价格反向变动; 。
此时, TR斜率为正,表示厂商总收益随销售量的增加 而增加。
当│ed│=1时,边际收益=0,总收益与价格变动无关;此
时,TR斜率为零,表示厂商总收益达到极大值点。
当│ed│<1时,边际收益<0,总收益与价格同向变动。此 时, TR斜率为负,表示厂商总收益随销售量的增加而
• 厂商自行决定产品价格, 价格曲线(需求曲线)向 右下方倾斜,
• MR<AR。
P MC
N
K AC AR=P
G
E
MR
• 仍要根据 MR=MC的利 润最大化原则决策。
• 完全垄断市场短期均衡的 条件:MR=MC
O
M
Q
• 完全垄断市场上,厂商 不可以任意定价,必须 根据市场来定价。
ppt课件
13
垄断厂商的短期均衡
存在进入障碍(Barriers to entry)
买方垄断?
完全垄断市场上,垄断者能获得超额利润主要是由于实行 了卖方垄断。
ppt课件
4
垄断的成因
• 对资源的独家控制,如南非的德别尔公司
• 拥有生产某种商品的专利权和技术, • 政府的特许,铁路
• 自然垄断,如自来水公司、煤气公司

AP微观经济学必备单词汇总

AP微观经济学必备单词汇总

AP微观经济学必备单词汇总AP微观经济学必备单词汇总三立为大家精心整理了AP微观经济学必备单词汇总,分享给大家,供大家参考,希望对大家有所帮助!1、经济学基础部分n Scarcity 稀缺性n Resources 资源: labor land capitaln Comparative advantage 比较优势, absolute advantage 绝对优势n opportunity cost机会成本n Production possibilities frontier生产可能性边界n an outward bow 向外弯曲n PPF上的点:Unattainable 不能达到的,efficient 有效率的n The Principle of Increasing Cost 机会成本递增规律n Specialization 专业化n Beneficial 有好处的n Command economy(socialism)计划经济n Market economy (capitalism)市场经济: buyers and sellers exchange(交易) goods and services on a voluntary basis(自愿基础上)n Equitable 公平的n Productive 有生产能力的n Fundamental 基础的n Adaptable 形容生产两种产品所需的资源差不多,如运动衣和衬衣。

n Constant 持续的,不变的2、供给和需求,弹性n Equilibrium Quantity / price 均衡数量/价格n increase/decrease 增加/减少n demand/supply 需求/供给n quantity demanded/quantity supplied 需求量/供给量n shift to the left 向左移动a movement along the curve 沿着曲线的移动n determinants 决定因素,影响因素n taste preference 口味,偏好n expectation of income 对未来收入的预期n substitute/complement 替代品/互补品n Necessity/Luxury 必需品/ 奢侈品n Normal goods/ inferior goods 收入增加购买增加的产品/ 收入增加购买反倒减少n Expenditure 消费,支出n tax/ subsidy 税/补助n shortage/surplus 供不应求/ 供大于求n Simultaneous 同时的n indeterminate 不确定的n Price ceiling/price floor 最高限价/最低限价n Gasoline 汽油steak 牛排n Input 投入n Below/above 在……下/在……上n Effective 有效的efficient 有效率的n Price Elasticity of Demand 需求价格弹性n Price Elasticity of Supply 供给价格弹性n Income Elasticity of Demand 收入需求弹性n cross elasticity of demand 交叉需求弹性n Proportion 比例3、剩余,税收,国际贸易n Trade 贸易n Tax税, tax revenue税收收入=T*Q, distribution of tax burden 税收负担的分配n a per-unit(an excise) sales tax 每卖出一件收取T n a lump sum tax 无论盈利多少,固定收取T——可以理解成罚款n price without tax 不收税时的价格n price buyers pay 消费者支付价格price sellers receive 厂商得到的价格n Tariff 关税n Consumer/producer surplus,消费者生产者剩余deadweight loss无谓损失n Export出口, import进口n Domestic price 国内价格, world price世界价格n Net gain 净收益4、要素市场部分n derived demand 派生需求n Factors 要素:Labor 劳力capital 资本land 土地-------注意各要素之间的影响!! n MRP marginal revenue product 边际产量值n MP marginal (physical)product 边际产量n Wage taker 指企业只能接受市场工资水平n Immigration 移民-------使劳动供给增加n Productivity 生产能力n Leisure 休闲,闲暇n Lorenz curve曲线n Gini coefficient基尼系数-----一般不考,作为常识5、市场失灵,外部性,公共物品n Market failure 市场失灵n Negative 负positive 正n externality 外部性spillover effects 外溢效应n allocate resources efficiently 有效配置资源n Marginal Social Benefit 边际社会效益MSC 边际社会成本n Remedy 补救措施policy 政策action 措施n Internalize 内部化n Impose a tax 征税use subsidy 补贴n Public goods 公共物品private goods 私人物品n Prevent from doing 排除,阻止n Rival 竞争的n Excludable 排他的exclude排除n Free rider 搭便车的人,享用公共物品但不付费的人n Neither consumers nor producers,other than the buyers and sellers 消费者和厂商之外的群体n Chemical industry 化工企业Pollute the air 污染空气-----------见于负外部性n National defense 国防-------见于正外部性或公共物品n vaccine 疫苗disease 疾病-----------见于正外部性n firework 爆竹---------见于负外部性6、消费者选择n Income effect 收入效应n substitution effect替代效应n Total utility 总效用n Decreasing marginal utility边际效用递减-----例子:吃饼的故事n Budget constraint 消费者的预算约束n real income 收入的实际购买力--------见于价格变动时的收入效应7、成本和市场结构n Accounting profit会计利润,economic profit经济利润n Explicit costs显性成本,implicit costs隐性成本n Normal profit/ breaking even指的经济利润为0(但依然赚着会计利润)n total cost总成本, fixed cost固定成本, variable cost可变成本, production function生产函数n law of diminishing marginal returns/product 边际产量递减n efficient scale有效规模产量(ATC最小时)n economies of scale 规模经济diseconomies of scale 规模不经济, returns to scalen eventually 最终n Earn (zero) economic profit有经济利润或0利润n Incur a loss 导致损失n Profit maximization 利润最大化n Imperfect competition 非完全竞争n Price taker 企业只能接受市场定价price maker/ market power 企业可自行定价n Exit停业, shutdown退出, enter进入, entry进入(名词)n Patent专利, copyrights版权, natural monopoly自然垄断n price Discrimination 价格歧视n Antitrust policy反托拉斯法管制非完全竞争的企业n Excess Capacity 产能过剩(有多余产能没用上)n Product differentiation 产品差异化,advertising广告n Interdependent互相依赖, collusion 联盟,cartels卡特尔n Efficient, inefficient 有效的,无效的n Payoff matrix支付矩阵, dominant strategy占优策略game theory 博弈论n Fair return 需求曲线和AC曲线的交点, unregulated monopoly 没有管制下的垄断n No barriers to entry 没有进入壁垒n Different不同的, identical相同的n efficiency maximizing, socially optimal, allocatively efficient 是一回事,P=MC 或说D与MC相交处以上就是三立为大家总结的AP微观经济学必备单词汇总。

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PowerPoint presentation by Dr Anne Abraham, University of Western Sydney
5
Types of bonds continued
• Convertible and callable bonds – Convertible bonds can be converted into ordinary shares at the bondholder’s option – Callable bonds can be retired at stated dollar amount prior to maturity at the issuer’s option – most corporate bonds are issued with a call feature
liabilities section of the statement of financial
position because the maturity is more than one
year away
PowerPoint presentation by Dr Anne Abraham, University of Western Sydney
微观经济学Non-current liabilities
BOND BASICS
LO1
• Bonds are interest-bearing notes payable that are issued by companies, universities and government agencies
12
Issuing bonds at face value continued
– Entry to record payment of bond (assuming no accrual of interest)
Jan 1 Bond Interest Expense
45 000
Cash
45 000
92 639 7 361
100 000
PowerPoint presentation by Dr Anne Abraham, University of Western Sydney
15
Issuing bonds at a discount
continued
• Statement of financial positiபைடு நூலகம்n (partial)
• In authorising a bond issue, the board of directors must state – No. of bonds to be authorised – Total face value – Contractual issue rate
PowerPoint presentation by Dr Anne Abraham, University of Western Sydney
• They are in small denominations (usually a thousand dollars)
• To obtain large amounts of non-current capital, management usually must decide whether to issue ordinary shares (equity financing) or bonds (debt financing)
(To record payment of bond interest)
– Adjusting entry to recognise interest incurred but
not paid
Jun 30 Bond Interest Expense Bond Interest Payable (To accrue bond interest)
7
Issuing procedures continued
• Face value is amount of principal the issuer must pay at the maturity date
• Contractual (or stated) interest rate is the rate used to determine amount of cash interest the borrower pays and the investor receives
Example
– On 1 June 2010 Candlestick Ltd sells $100 000 5year 10% bonds for $92 639
– Interest payable 1 July and 1 January
– Entry to record issue:
Jan 1 Cash Unamortised discount Bonds Payable (To record sale of bonds at a discount)
• Bond indenture is a legal document setting out the terms of the bond issue
• Bond certificates provide information such as name of issuer, face value, maturity date, contractual interest rate
$50 000 7 361
$57 361
16
Issuing Bonds at a Discount (cont'd)
• Balance sheet (end 1st yr)
– Bearer (or coupon) bonds are bonds that are not registered to the owner – this means that holders of the bearer bonds must send in coupons to receive interest payments
PowerPoint presentation by Dr Anne Abraham, University of Western Sydney
6
Issuing procedures
• Approval by both the board of directors and shareholders is usually required
($100 000 x 10% x ½ = $5000; $5000 x 10) Add: Bond discount ($100 000 - $92 639)
Total cost of borrowing
PowerPoint presentation by Dr Anne Abraham, University of Western Sydney
– Entry to record bond issue
Jul 1 Cash
1 000 000
Bonds Payable
1 000 000
(To record issue of bonds at face value)
– Bonds payable are reported in non-current
Non-current liabilities Bonds payable Less: Unamortised discount
$100 000 7 361 $92 639
• Total cost of borrowing
Bonds issued at a discount Semi-annual interest payments
PowerPoint presentation by Dr Anne Abraham, University of Western Sydney
10
ACCOUNTING FOR BOND ISSUES
LO2
• Bonds may be issued – at face value – below face value (at a discount), or – above face value (at a premium)
45 000 45 000
PowerPoint presentation by Dr Anne Abraham, University of Western Sydney
13
Discount or premium on bonds
Market Rates 8%
Bonds Sell at: Premium
PowerPoint presentation by Dr Anne Abraham, University of Western Sydney
2
Types of bonds continued
• Registered and bearer bonds
– Registered bonds are bonds issued in the name of the owner with interest payments being made to the bondholder of record
9
Determining the market value of bonds
• The present value of a bond is the amount at which it should sell in the marketplace
• It is determined by – cash amounts to be received (face value + contractual interest rate) – length of time until investor receives cash – by current market rate of interest
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