[試題] 99上 江瑞祥 經濟學乙一 期中考
課程名稱：經濟學乙一
課程性質︰必修
課程教師︰江瑞祥
開課學院：社會科學院
開課系所︰政治系
考試日期（年月日）︰2010/11/19
考試時限（分鐘）：120分鐘
是否需發放獎勵金：是
1.(20 points)The prairie dog has always been considered a problem for American
cattle ranchers. They dig holes that cattle and horses can step in and they
eat grass necessary for cattle. Recently, ranchers have discovered that there
is a demand for prairie dogs as pets. In some areas prairie dogs can sell for
as high as $150. Cattlemen are now fencing off prairie dog towns on their
land so these towns will not be disturbed by their cattle.
Draw a production possibilities frontier showing a rancher's production
option between cattle production and prairie dog production showing
increasing opportunity cost and show what would happen in each of the
following situations. (Use a separate graph for each situation.)
a. The outcome is efficient, with ranchers choosing to produce equal numbers
of cattle and prairie dogs.
b. As a protest against the government introducing the gray wolf back into
the wild in their state, ranchers decide to withhold 25 percent of the
available grassland for grazing.
c. The price of prairie fogs increases to $200 each, so ranchers decide to
allot additional land for prairie dogs.
d. The government grants new leases to ranchers, giving them 10,000 new
acres of grassland each for grazing.
e. A drought destroys most of the available grass for grazing of cattle, but
not for prairie dogs since they also eat plant roots.
2.(10 points)The only two countries in the world, Alpha and Omega, face the
following production possibilities frontiers.
(附圖 http://ppt.cc/hrTM )
a. Assume that each country decides to use half of its resources in the
production of each good. Show these points on the graphs for each country
as point A.
b. If each country decides to trade 100 units of popcorn for 100 units of
peanuts, show on the graphs the gain each country would receive form trade.
Label these points B.
3.(5 points) Recently, in Smalltown, the price of Twinkies fell from $0.80 to
$0.70. As a result, the quantity demanded of Ho-Ho's decreased from 120 to
100. What would be the appropriate elasticity to compute? Using the midpoint
method, compute this elasticity. What does your answer tell you?
4.(15 points) Using a supply-demand diagram, show a labor market with a binding
minimum wage. Now, use the diagram to show those who are helped by the
minimum wage, and those who are hurt by the minimum wage.
5.(20 points) Answer the following questions based on the graph that represents
J.R.'s demand for ribs per week of ribs at Judy's rib shack.
( 附圖 http://ppt.cc/DtjA )
a. How much is J.R. willing to pay for 20 ribs?
b. What is the magnitude of J.R.'s consumer surplus at the equilibrium price?
c. How high must the price of ribs be for Judy to supply 20 ribs to the
market?
d. At the equilibrium price, what is the magnitude of total surplus in the
market?
e. Explain why the graph that is shown verifies the fact that the market
equilibrium (quantity) maximizes the sum of producer and consumer surplus.
6.(30 points)Jolin has a budget of $120 a week that she spends on chocolate and
music CDs. Let the price of chocolate be PC=$2 and the price of a music CD be
PCD=$6.
a. Draw her budget line on a (perfferably large) graph with CDs on the
X-axis.
b. Assuming that she buys 30 chocolates at her optimum, draw her typical
indifference curve at her optimum bundle on the same graph. Label the
optimum as A. What is the marginal rate of substitution at point A?
Now suppose the price of a CD become cheaper at $4. Yet, on her optimum, she
continues to consume the same amount of chocolate, that is, 30 chocolates.
c. Draw her new budget line on the same graph.
d. Show a typical indifference curve consistent with her new optimum
consumption bundle. Label it as B.
e. Show the substitution and income effects for the consumption of music CDs
due to the price change in music CDs as mentioned above.
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※ 編輯: misshey79 來自: 114.42.219.197 (11/21 15:23)
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