課程名稱︰個體經濟學
課程性質︰系定必修
課程教師︰劉鶯釧老師
開課學院：社會科學院
開課系所︰經濟學系
考試日期（年月日）︰2007/11/08
考試時限（分鐘）：120分鐘
是否需發放獎勵金：是 謝謝^^
（如未明確表示，則不予發放）
試題 :
1.(20%)
Suppose one day your local shoe store has a sale where they charge $9 for a
right shoe and $1 for a left shoe. You maximize your utility by buying one
pair of shoes. Now suppose the next week, the same shoe store offers a sale
where they cfarge $5 for a left shoe and $5 for a right shoe. Will the
charge in prices lead to a change in the amount of shoes you purchase?
Explain, using a graph.
2.(20%)
Compare the effects of a program where the government subsidizes the price
of school lunches for low-income families versus a program where the
famalies are given equivalent cash transfers. Under which program are the
recipients better off? Explain, using a graph.
3.(20%)
Ben has an income of $6,000 and the prices of other goods is $1. He has two
cellular phone plan option. Plan 1 is a $0.3-per-minute plan for all calls.
Plan 2 offers up to 3,000 minutes for a flat fee of $600 with each minute
after that costing $0.25. Draw his budget line. Is it possible for Ben to
prefer Plan 1 to Plan 2? Explain, using a graph.
4.(20%)
Joan buys gasoline and food. When the price of gasoline is $1 per gasoline,
she buys 50 gallons of gas per week and spends $50 on food per week. The
government wants to reduce consumption of gasoline as part of an
environmental policy and is considering two alternatives. They are :(1)
Restrict the number of gasoline anyone can buy to 40 gallons per week, and
(2) Raise the price of gasoline to $1.25 per gallon. Assume for simplicity
that food always costs $1 per unit. Show on a graph Joan's initial budget
line under policy (1) and policy (2). Would Joan be better off under policy
(1) or (2)?
5.(30%)
(1)If good X is normal and the consumer is competely income-elastic to good
Y, then income-comsumption path is a(n)
(A)vertical straight line.
(B)convex curve.
(C)upward sloping curve.
(D)horizontal straight line.
(2)Suppose Homer prefers more classical CDs to less but he is competely
indifferent to jazz CDs. If jazz CDs are measured along the vertical
axis and classical CDs are measured along the horizontal axis, his
indifference curves for classical CDs and jazz CDs would be
(A)vertical lines.
(B)right angled lines.
(C)horizontal lines.
(D)convex curves.
(3)If an income-comsumption path is negatively sloped, then
(A)both good X and good Y are normal.
(B)both good X and good Y are inferior.
(C)one good is normal and the other good is inferior.
(D)we cannot say whether either good is normal or inferior.
(4)A Giffen good is a(n)
(A)normal good in which the substitution effect is stronger than the
income effect.
(B)inferior good in which the income effect is stronger than the
substitution effect.
(C)inferior good in which the substitution effect is stronger than the
incone effect.
(D)normal good in which the income effect is stronger than the
substitution.
(5)Andy buys 10 pounds of onions per month when the price is $0.75 per pound
.If the price falls to $0.5 per pound, he buys 30 pounds of onions. What
is his arc elasticity of demand for this price range?
(A)2.5
(B)6
(C)1.33
(D)2
(E)None of the above is correct.
(6)If the demand for a good is perfectly inelastic, then the good must be
a(n)
(A)indeterminate.
(B)inferior good.
(C)Giffen good.
(D)normal goods.
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