[試題] 98-1 張清溪 經濟學原理第二次小考
課程名稱︰經濟學原理
課程性質︰必修（兼通識）
課程教師︰張清溪
開課學院：社科院、管院
開課系所︰經濟系、國企系、財金系
考試日期（年月日）︰98.11.02
考試時限（分鐘）：50分鐘
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
一、選擇題（40％）（每題4分，共十題）
1）If the market price of green tea is $2.00 per pound but the government will
not allow green tea growers to charge more than $15.00 per pound of green
tea, which of the following will happen?
A)Demand must eventually decrease so that the market will come into
equilibrium at a price of $17.50
B)There will be a shortage of green tea
C)Supply must eventually increase so that the market will come into
equilibrium of $17.50
D) There will be a surplus of green tea
2）The government imposes a maximum price on apartments that is below the
equilibrium price. You accurately predict that
A)the law will have no economic impact
B)landlords are less likely to do routine maintainance work in the
apartments
C)renters will find that landlords start offering to furnish the apartments
D)the law will create a surplus of apartments
3）The ratio of the marginal utility of coffee to the marginal utility of
donuts is 1/3 for an individual maximizing utility. This implies that
A)a donut is 3 times more than a cup of coffee
B)the coffee to donut's price ratio is 1/3
C)the coffee to donut's price ratio is 3
D) this person always eats donuts with coffee
4）If MUx/Px>MUy/Py, then
A)spending a dollar less on Y and a dollar more on X increases utility
B)spending a dollar less on X and more on Y increases utility
C)X is more expensive than Y
D)Y is more expensive than X
5）For inferior goods, the substitution and income effects of a price decrease
will
A)both decrease the quantity of the good demanded
B)both increase the quantity of the good demanded
C)the substitution effect will decrease the quantity of the good demanded
while the income effect will decrease the quantity of the good demanded
D)the substitution effect will decrease the quantity of the good demanded
while the income effect will increase the quantity of the good demanded
Refer to Scenario 7.2 below the questions that follow
Scenario 7.2: You own and you are the only employee of a company that sets
odds for sporting events. Last year your total revenue was
$70000. Your costs for rent and supplies were $50000. To start
this business you invested an amount of your own capital that
could pay you a $20000 a year return.(Note that, once you start
this business, you couldn't receive any payment($20000) every
year.)
6)Refer to Scenario7.2 Your economic profit last year was
A)-$10000
B)$0
C)$10000
D)$50000
7)Refer to Scenario7.2 A yearly normal profit for tour company is
A)$20000
B)$40000
C)$60000
D)$100000
8)In the short run(assume there are only two inputs, capital and labors and
capital is constant in the short run), diminishing marginal returns implies
A)decreasing average variable costs
B)decreasing marginal costs
C)increasing marginal costs
D)decreasing average fixed costs
9)Engineers for The Giffen Record Company determine that a 30% increase in all
compact disc inputs will cause a 40% increase in output. Assuming that input
prices remain constant, you correctly deduce that such a change in inputs
will cause ____ as output increases.
A)average costs to increase
B)average costs to decrease
C)average costs to remain constant
D) marginal costs to increase
10)Assume Dell Computer Company operates in a perfectly competitive market
producing 5000 computers per day. At this output level, price exceeds the
firm's marginal and average variale costs. It follows that producing one
more computer will cause this firm's
A)total cost to decrease
B)profits to increase
C)profits to decrease
D)profits to remain unchanged
二、問答題
1.假設有一房屋市場一開始能藉由價格機能來達成均衡，此時的均衡價格為P0。均衡數量
為Q0。但是很不幸的，今年發生一場大地震，把房屋都震垮了，因此造成房屋供不應求
。眼看房屋價格節節上升，於是政府實施價格上限管制(price ceiling)，限制房屋的
成交價格只能在P0。
（1）請問在地震發生前，價格機能能夠發揮時，消費者剩餘、生產者剩餘以及社會總剩
餘為多少？此時有無所謂的無謂損失（dead weight loss）產生？（需畫圖分析）
（2）請問在地震發生後，政府實施價格管制時，消費者剩餘、生產者剩餘及社會總剩餘
為多少？這時候有沒有所謂的無謂損失產生，有的話是多少？（需畫圖說明）
2.假設有兩個商品X與Y，兩商品價格為Px與Py。請你用無異曲線推導出X商品的個人需求
曲線。
3.下圖是一個完全競爭廠商在短期時的成本圖，請你根據下圖回答以下問題：（圖略）
（1）請問當MR＝18如圖所示，則短期時完全競爭廠商在追求利潤極大的最適決策為何？
此時的總收入（TR）、總固定成本（TFC）、總成本（TC）、總變動成本（TVC）、
邊際成本（MC）以及利潤為多少？
（2）請問短期完全競爭廠商的供給曲線是哪一段？廠商所面對的需求曲線又是哪一條？
（3）請問該完全競爭廠商短期時的停業點（shutdown point）在哪裡？該廠商在短期時
有沒有可能面臨虧損還繼續生產？為什麼？
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