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1、内蒙古农业大学2011/2012 学年第一学期微观经济学课程考试试卷(A）题 号分 值得 分一15二20三20四20五25总分100Please print.If the answer is unrecognizable,it will be counted as wrong answer.Please print.If the answer is unrecognizable,it will be counted as wrong answer.You should answer in English or ChineseYou should answer in English or Chi
2、nese，numbers,or graphs.numbers,or graphs.GradeGrader.Concepts.Concepts（3 points each3 points each，total 15 pointstotal 15 points）1。Opportunity cost2.Externality3。Deadweight loss4.Competitive market5.Diminishing marginal productGradeGrader。True or False Questions(2 points eachTrue or False Questions(
3、2 points each，total 20 points)total 20 points)（f)1。If apple and orange are substitutes，when price of apple increases,then thedemand for orange decreases。(f)2。The price elasticity of demand remains constant along a linear demand curve。微观经济学试卷（A）第 1 页（共 6页）(t）3.When price ceiling is below equilibrium
4、price in a competitive market,theprice ceiling is binding,and there is shortage in the market.（t）4.Total surplus is the values to buyers minus the cost to sellers.(f）5。When taxed is levied on the good in a competitive market,the tax revenuegot by the government equals the fall in producer and consum
5、er surplus.(f）6。If the world price of a good exceeds the domestic price,the country shouldimport the good instead to export it。（t）7.In the presence of a negative externality,Qoptimum is therefore larger than theQmarket。(f）8。Price always equals to marginal revenue for all kinds of firms.（t)9。Demand c
6、urve for a monopoly firm is the market demand curve.（f)10.In the long run,monopolistic competitive firms produce at their lowest averagetotal cost。GradeGrader。Single Choice QuestionsSingle Choice Questions（2 points each2 points each，total 20total 20points)points)(d)1。If the crossprice elasticity of
7、demand for two goods is negative，these twogood are？A.Luxury goods.B.Necessities.C.Substitutes。D.Complements。微观经济学试卷（A）第 2 页（共 6页）（a)2.Although buyers and sellers share the burden of tax together,sellers sharemore if the good is_A.Food。B.Clothes.C.Housing.D.Entertainment good.(c）3。Consumer surplus is
8、 the areaA.Above the supply curve and below the price。B.Below the supply curve and below the priceC.Below the demand curve and above the priceD.Below the demand curve and below the price(a）4.If we double the size of tax under the perfectly competitive market，so thedeadweight loss _A.Is four times as
9、 the original one.B.Is twice as the original one。C.Remain the sameD.May increase or decrease。(b)5.Which of the following items is an example of public goods?A.Fishes in the ocean.B.National defense.C.Apples on a household s apple tree.D.Hot dogs in a picnic。()6。If the production function has the att
10、ribute of diminishing marginal returns,the slope of the total cost curve which is associated with the production functionA.Increases when produced quantity increaseB.Decreases when produced quantity increase。C.Remains the same。D.May be any one mentioned above。(d)7。If the marginal cost curve is below
11、 the average total cost curve,_.微观经济学试卷（A）第 3 页（共 6页）A.Average total cost increases.B.Average fixed cost increases.C.Average total cost achieves its minimum.D.Average total cost decreases.（b)8.If a competitive firm achieve its long-run equilibrium state，A.Its average total cost achieves its minimum。
12、B.Marginal cost equals marginal revenue.C.It gets zero economic profit.D.All the items mentioned above are correct.(a)9。The inefficiency of monopoly is caused by_A.Deficient production of monopoly.B.Overproduction of monopoly.C.Monopolistic profit。D.Monopolistic loss。（a）10.The meaning of“monopolisti
13、c”in“monopolistic competition”is_A。monopolistic competitive firm faces a downward sloping demandcurve。B.monopolistic competitive firm can freely enter and exit the market。C。monopolistic competitive firm charges the price as its marginal cost.D。monopolistic competitive firm produce at its efficient s
14、cale.GradeGrader。Problems for calculationProblems for calculation（total 20 points)total 20 points)1.The monopolys cost is a function of its output，which is C(Q)=Q2+12,and themonopoly faces the linear inverse demand function:P=24Q（total 10 points）（1)Calculate following items：marginal cost,average fix
15、ed cost，average variablecost,average total cost，and marginal revenue（5 points)（2)Calculate profitmaximizing output（2 points）and profitmaximizing price(1point)，determine its economic profit（2 points)微观经济学试卷（A）第 4 页（共 6页）2.The following is the demand schedule for consumers of watching two identicalbas
16、eball games in a city。The baseball field and baseball players for these two teams arefreely provided by the baseball league(total 10points)Price（dollars）6543210（1）If it is a perfectly competitive market,determine the price and quantity。（2points）（2)If the duopoly makes collusion to become a cartel,de
17、termine the price，quantity andprofit for each firm if the only goal for them is profit maximizing。(3 points）(3）If they fail to make collusion,determine their individual profit if Nash equilibrium isachieved.（3 points）（4)Draw out two teams strategies about their outputs and profits(Note：Use the chart
18、of prisoner dilemma shown in our textbook，please)。（2 points）GradeGraderQuantity demanded0100020003000400050006000.Short answers items(total 25 points).Short answers items(total 25 points)1。Why firms in a perfectly competitive market produce at their efficient scales whenthey achieve their long run e
19、quilibrium?（5points）完全竞争厂商在长期内对全部生产要素的调整可以表现为两个方面：一方面表现为厂商进入或退出一个行业，这也就是行业内企业数量的调整；另一方面表现为厂商对生产规模的调整。完全竞争厂商的长期均衡就是通过这两个方面的调整而实现的。一、长期内厂商的生产调整及最优生产规模的选择在长期内,如果行业内的单个厂商可以获得超额利润，则会吸引其它新的厂微观经济学试卷（A）第 5 页（共 6页）商加入到该行业的生产中来。随着新厂商的加入,行业内的厂商数目增加，整个行业的供给就会增加，市场价格就会下降，而且会一直下降到使单个厂商的超额利润消失为止。相反，如果行业内的单个厂商的生产是亏
20、损的，则行业内原有厂商中的一部分就会自动退出生产。随着原有厂商的退出，行业内厂商的数目就会减少，整个行业的供给就会减少，市场价格就会上升，而且会一直上升到使单个厂商的亏损消失为止。最后，由于行业中的每一个厂商都处于一种既无超额利润又无亏损的状态，行业内厂商的进入和退出也就停止了，于是，完全竞争厂商便处于一种长期均衡状态。2。When a country allows trade and becomes an exporter of a good，who will becomebetter off and who will become worse off compared to the sta
21、te without internationaltrade，why？Please use the economic model to explain it。(5 points)消费者剩余减少,生产者剩余增加,总剩余增加3.Compare the differences and similarities among perfect competition，monopolisticcompetition and monopoly。（Notes：using the appropriate economic models issuggested;Features compared include the basic attributes of different firms，rule formaximizing profit,how firms achieve their maximum profits，the shortrun and longrun equilibrium for these firms and their economic profit in the short run and inthelong run，15points）基本属性,最大化原则，怎样最大化，长短期均衡，长短期收入微观经济学试卷（A）第 6 页（共 6页）