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課程名稱︰個經經濟學
課程性質︰系訂必修
課程教師︰江淳芳
開課學院：社會科學院
開課系所︰經濟系
考試日期（年月日）︰99年4月19日
考試時限（分鐘）：120分鐘
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
選擇題(20%)
1.Suppose that 3500 people are interested in attending Elvisland.Once a person
arrive at Elvisland, his or her demand for rides is given by x=max{7-p,0},
where p is the price per ride. There is a constant marginal cost of $3 for
provind a ride at Elvisland. Elvisland charged a profit-maxmizing two-part
tariff, with one price for admission to Elvisland and another price per ride
for those who get in. How much should it charge per ride and how much for
admission?
a.$3 per ride and $7 for admission
b.$0 per ride and $4 for admission
c.$0 per ride and $11 for admission
d.$3 per ride and $8 for admission
e.$7 per ride and $7 for admission
2.On a small island, papayas can only be sold in the market in the center of
the island. Although papayas only cost $1 to rise, they can be sold in the
market for $3. But it costs $.10 per kilometer to transport each papaya to
market. If an acre of land grows 200 papayas, how much rent dose an acre of
land 4 kilometers from the market command?
a.$302
b.$320
c.$240
d.$262
e.None of the above.
3.A monopolist enjoys a monopoly over the right to sell automobiles on a
certain island. He imports automobiles from abroad at a cost of $10000 each
and sells them at the price that maxmizes profits. One days, the island's
government annexes a neighboring island and extends the monopoly rights to
this island. People on the annexed island have the same tastes and incomes
and there are just as many people an on the first.
a.The monopolist doubles his price and his sales stay constant.
b.The monopolist keeps his price constant and his sale double.
c.The monopolist raises his price but dose not necessarily double it.
d.The monopolist's profit more than double.
e.None of the above.
4.A firm has the production funtion f(x,y)=x^(1.10)y^1. The firm has
a.constant return to scale.
b.decreasing return to scale and diminishing marginal product for factor x.
c.increasing return to scale and decreasing marginal product for factor x.
d.decreasing return to scale and increasing marginal product for factor x.
e.None of the above.
問答題
1.North America Manufactuting has the production funtion f(K,L)=min{0.25K,0.5L}
,where K is units of capital and L is hours of labor.
a.To produce y units of output, how many units of K and L would it need?
b.If the firm faces factor price(1,1),what is the cost of producing y units
of for this firm?
2.The market demand funtion for apples is Q=20000-5000P and the apple industry
is perfectly competitive. Currently there are 100 identical farms owned by
100 farmers, and you own one of the farm. The total cost funtion for any farm
is:TC(q)=0.01q^2+q+100, where q is pounds of apples a farm produces and sells
daily.
a.Please find the market supply curve in the short run.
b.How many pounds of apples should you prouduce to maximizie your profit?
c.What is your profit?
d.What is the minimum value of your average cost funtion?
e.In the long run, how many firms will serve the market?
f.Use your economic intuition to explain why the number of firms increasing
or decreasing in the long run.
3.有一個封閉的小島A，其電信業手機市場的需求函數為PA=80-2.5QA。
a.假設政府只允許一家廠商，天天通訊，供應小島A的手機市場。"天天通訊"的成本函
數為C=50+40Q。試求小島A手機市場的均衡PA、QA。
b.請問政府發給這家廠商的營業執照價值多少？
c.現在另一個小島B的手機市場也開放了，其市場的需求函數為PB=200-10QB，天天通訊
也取得了這個小島B的唯一營業執照。若兩個小島的人民由於政治因素不能互相往來
也無法互相貿易，但該廠可同時供應這兩個市場，請問均衡的(PA、QA)及(PB、QB)各
是多少？
d.由(c)小題，該廠商在兩個市場的訂價哪一個比較高？請試著以經濟直覺解釋這個現
象。
4.The inverse market demand curve for bean sprouts is given by P(Y)=100-2Y,
and the total cost funtion for any firm in the industry is given TC(y)=4y
a.If the bean-sprout industry were perfectly competive, what would the
industry price be?
b.Suppose that two Cournot firms operated in the market.Please find reaction
funtions for firm1 and firm2.Draw the two reaction curves and indicate the
equilibrium point.
c.If the firms were operating at the Cournot equilibrium point, each firm
would produce_______,and the market price would be _______.
d.If the two firms decides to collude, industry output would be _______,and
the market price would equal ______.
e.Suppose both of the colluding firms are producing equal amounts of output.
If one of the colluding firm assumes that the other firm would not react
to a change in industry output, what would happen to a firm's own profit
if it increased its output by one unit?
f.Suppose one firm acts as Stackleberg leader and the other firm behaves as
a follower. How many units should the leader produce? How many units
should the folloewr produce? What is the market price?
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◆ From: 140.112.211.224
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※ 編輯: j79523 來自: 140.112.211.224 (04/19 20:54)