第一章 单元测试
1、单选题：What Microeconomics is about?( )
A:Study of the Economy at Micro Level
B:Study of financial position of the economy
C:Study of Business Environment
正确答案:【Study of the Economy at Micro Level】
2、单选题：Economics proceeds by making models of ( ), which are simplified representations of reality.
A:people’s imagination
B:stories
C:social phenomena
正确答案:【social phenomena】
3、单选题：The demand curve shows ( )
A:how much market would like to trade.
B:how much people would like to pay at the reserve prices.
C:how much firms would like to sell at each prices.
正确答案:【how much people would like to pay at the reserve prices.】
4、判断题：The conflict between the scarce economic wants of society and its limited resources gives rise to the economizing problem.
A:对
B:错
正确答案:【对】
5、判断题：The only requirement for a market to be perfectly competitive is for the market to have many buyers and sellers.
A:对
B:错
正确答案:【错】
6、单选题：Econimics is the study of
A:How to make economic policies
B:How to maxmize comsumer wealth
C:How societies use scarce resources
D:How to maxmize the profit
正确答案:【How societies use scarce resources 】
7、单选题：Scarce resources mean
A:Resources are not renewable
B:Resource must be protect for next generation
C:Resources will be exhausted
D:Comparing with demand, resources are always limited
正确答案:【Comparing with demand, resources are always limited】
8、判断题：In market, prices will transfer information about supply and demand
A:错
B:对
正确答案:【对】
9、判断题：Economic equilibrium means the economic status will not be changed without others changing.
A:对
B:错
正确答案:【错】
10、判断题：Market allocation of resources means market use prices as signals to allocate resources to their highest valued use.
A:错
B:对
正确答案:【对】
第二章 单元测试
1、判断题：If there are two goods with positive prices and the price of one good is reduced, while income and other prices remain constant, then the size of the budget set is reduced.
A:错
B:对
正确答案:【错】
2、判断题：If preferences are transitive, more is always preferred to less.
A:对
B:错
正确答案:【错】
3、判断题：With quasi-linear preferences, the slope of indifference curves is constant along all rays through the origin.
A:错
B:对
正确答案:【错】
4、单选题：Hans has 27 dollars, which he decides to spend on x and y. Commodity x costs $16 per unit and commodity y costs $10 per unit. He has the utility function U (x, y)=5×2 + 2y2 and he can purchase fractional units of x and y.
A: Hans will chose some of each commodity, but more y than x.
B: Hans will choose only y.
C: Hans will choose some of each commodity, but more x than y.
D: Hans will choose only x.
正确答案:【 Hans will choose only y.】
5、单选题：Wanda Littlemore’s utility function is U (x, y) = x + 63y2.Her income is 184. If the priceof x is 1 and the price of y is 33, how many units of good x will Wanda demand?
A:17
B:22
C:24
D:19
正确答案:【19】
6、判断题：If one utility function is a monotonic transformation of another, then the former must assign a higher utility number to every bundle than the latter.
A:错
B:对
正确答案:【错】
7、判断题：If a consumer does not have convex preferences, then a point of tangency between her indifference curve and her budget line must be an optimal consumption point.
A:对
B:错
正确答案:【错】
8、单选题：Isobel consumes positive quantities of both jam and and juice. The price of jam is 5 cents per unit and the price of juice is 10 cents per unit. Her marginal utility of jam is 10 and her marginal utility of juice is 5.
A:
Without changing her total expenditures on jam and juice, she could not increase her utility.
B:
Without changing her total expenditures, she could increase her utility by consuming more jam and less juice.
C:
Without changing her total expenditures, she could increase her utility by consuming more juice and less jam.
D:
We can’t tell whether any of the other statements are true or false without knowing the quantities she consumes.
正确答案:【
Without changing her total expenditures, she could increase her utility by consuming more jam and less juice.
】
9、单选题：
A:19
B:22
C:17
D:24
正确答案:【19】
10、判断题：If the equlibrium price of gasoline is $1.00 per gallon and the government places a price ceiling on gasoline of $1.50 per gallon, the result will be a shortage of gasoline
A:对
B:错
正确答案:【错】
第三章 单元测试
1、判断题：If preferences are quasilinear, then for very high incomes the income offer curve is a straight line parallel to one of the axes.
A:对
B:错
正确答案:【对】
2、判断题：If two goods are substitutes, then an increase in the price of one of them will increase the demand for the other.
A:对
B:错
正确答案:【对】
3、判断题：An Engel curve is a demand curve with the vertical and horizontal axes reversed.
A:对
B:错
正确答案:【错】
4、单选题：Daisy received a tape recorder as a birthday gift and is not able to return it. Her utility function is U(x,y,z)=x+z1/2f(y)where z is the number of tapes she buys, y is the number of tape recorders she has and x is the amount of money she has left to spend. f(y)=0if y<1and f(y)=8 if y is 1 or greater. The price of tapes is 2 and she can easily afford to buy dozens of tapes. How many tapes will she buy?
A:
6
B:
8
C:
4
D:
2
正确答案:【
4
】
5、单选题：Mike consumes two commodities, x and y; and his utility function is min{x +2y,y+2x}. He chooses to buy 8 units of good x and 16 units of good y. The price of good y is 0.50. What is his income?
A:40
B:32
C:24
D:16
正确答案:【16】
6、判断题：Quasilinear preferences are homothetic when the optimal amount of one of the goods is not affordable.
A:对
B:错
正确答案:【错】
7、单选题：Walt consumes strawberries and cream but only in the fixed ratio of three boxes of strawber ries to two cartons of cream. At any other ratio, the excess goods are totally useless to him. The cost of a box of strawberries is 10 and the cost of a carton of cream is 10. Walt’s income is 200.Which of the following is true?
A:Walt demands 10 boxes of strawberries.
B:Walt demands 12 boxes of strawberries.
C:Walt considers strawberries and cartons of cream to be perfect substitutes.
D:Walt demands 10 cartons of cream.
正确答案:【Walt demands 12 boxes of strawberries.】
8、单选题：Madonna buys only two goods. Her utility function is Cobb-Douglas. Her demand functions have which of the following properties?
A:Her demand for one of the two goods does not depend on income.
B:Her demand for each of the goods depends on income and on the prices of both goods.
C:Her demand for neither good depends on income.
D:Her demand for each of the two goods depends only on her income and on the price of that good itself.
正确答案:【Her demand for each of the two goods depends only on her income and on the price of that good itself.】
9、多选题：The downward sloping demand curve can be explained by： A:Diminishing marginal returns
B:none of all
C:The income effect
D:Diminishing marginal utility
正确答案:【The income effect;Diminishing marginal utility】
10、单选题：Other things held constant, which of the following would not cause a change in demand for beef?
A:An increase in the price of chicken which is a substitute for beef
B:A decrease in consumers’ incomes during a recession
C:An expectation that next month prices will be lower
D:A decrease in the price of beef
正确答案:【A decrease in the price of beef】
第四章 单元测试
1、判断题：The strong axiom of revealed preference requires that if a consumer chooses x when he can afford y; and chooses y when he can afford z; then he will not choose z when he can afford x.
A:错
B:对
正确答案:【对】
2、判断题：If a consumer maximizes a utility function subject to a budget constraint and has strictly convex preferences, then his behavior will necessarily satisfy the weak axiom of revealed preference and the strong axiom of revealed preference.
A:错
B:对
正确答案:【对】
3、判断题：The Laspeyres price index differs from the Paasche price index because the Laspeyres index holds prices constant and varies quantities while the Paasche price index holds quantities constant and varies prices.
A:对
B:错
正确答案:【错】
4、单选题：Let A stand for the bundle (7,9);B stand for the bundle (10,5); and C stand for the bundle (6,6). When prices are (2,4); Betty chooses C. When prices are (12,3) she chooses A. Which of the following is true?
A:None of all
B:C is directly revealed preferred to A.
C:A is directly revealed preferred to B.
D:A is indirectly revealed preferred to B.
正确答案:【None of all】
5、单选题：Remember that the Laspeyres price index uses the old quantities for the weights. In 1971, good x cost 3 and good y cost 1. The current price of good x is 3 and the current price of good y is 5. In 1971 the consumption bundle was (x,y) = (3,5). The current consumption bundle is (x,y) = (9 ,4). The Laspeyres index of current prices relative to 1971 prices is closest to which of the following numbers?
A:
2.43
B:
0.30
C:
1.52
D:
3.36
正确答案:【
2.43
】
6、判断题：It follows from the weak axiom of revealed preference that if a consumer chooses x when he could afford y and chooses y when he could afford x; then his income must have changed between the two observations.
A:对
B:错
正确答案:【错】
7、单选题：At prices (4,12); Harry chooses the bundle (9,4). At the prices (8,4); Harry chooses the bundle (2,9). Is this behavior consistent with the weak axiom of revealed preference?
A:No
B:It depends on his income.
C:We would have to observe a third choice to be able to say.
D:Yes
正确答案:【Yes】
8、单选题：A student spends all of her income on pizza and books. When pizzas cost $3 each and books cost $10 each, she consumed 30 pizzas and 3 books per month. The price of pizzas fell to $2.90 each while the price of books rose to $11 each. The price change:
A:made her worse off
B:had the same effect as a $3 increase in her income.
C:left her exactly as well off as before.
D:left her at least as well off as before and possibly helped her.
正确答案:【left her at least as well off as before and possibly helped her.】
9、单选题：If the bundle x is revealed (directly or indirectly) as preferred to the bundle y and x ¹ y, then it is never the case that the y is revealed (directly or indirectly) as preferred to x; so the necessary and sufficient condition for well-behaved preference is ( )
A:Strong Axiom of Revealed Preference
B:Revovering indifference curve
C:convexity and monotonicity
D:indirectly preferred
正确答案:【Strong Axiom of Revealed Preference】
10、判断题：Revealed preference analysis tests the behavioral hypothesis that a consumer chooses the most preferred bundle from those available.Discover the consumer’s preference relation.
A:错
B:对
正确答案:【错】
第五章 单元测试
1、判断题：A Giffen good must be an inferior good.
A:对
B:错
正确答案:【对】
2、判断题：The compensated demand function refers to the demand function of someone who is adequately paid for what he for she sells.
A:错
B:对
正确答案:【错】
3、判断题：In the case of homothetic preferences the entire change in demand from a price change is due to the substitution effect.
A:对
B:错
正确答案:【错】
4、单选题：Walt considers x and y to be perfect substitutes. They originally cost 10 and 9 respectively. His income is 720. One day the price of x drops to 8. Which of the following is true?
A:The substitution effect increases the quantity of y by 80.
B:The income effect increases the quantity of y by 90．
C:The income effect increases the quantity of x by 80.
D:The substitution effect increases the quantity of x by 90
正确答案:【The substitution effect increases the quantity of x by 90】
5、单选题：Suppose that bananas are a normal good and Woody is currently consuming 100 bananas at a price of 10 cents each.
A:His ordinary demand curve is steeper to the left and his Slutsky compensated demand curve is steeper to the right of this point.
B:His ordinary demand curve going through this point is steeper than his Slutsky compensated demand curve.
C:His Slutsky compensated demand curve going through this point is steeper than his ordinary demand curve.
D:Whether his ordinary demand curve or his compensated demand curve is steeper, depends on whether his price elasticity is greater than 1.
正确答案:【His Slutsky compensated demand curve going through this point is steeper than his ordinary demand curve.】
6、判断题：John purchases two goods, x and y. Good x is an inferior good for some range of income.There must be another range of income for which good x is a normal good.
A:错
B:对
正确答案:【对】
7、单选题：The following can be said about the income and substitution effects of a price increase on the demand for the good whose price rose:
A:While the former is always negative, the latter can be either positive or negative.
B:Both can be either positive or negative.
C:The former is always positive and the latter is always negative.
D:While the latter is always negative, the former can be either positive or negative.
正确答案:【While the latter is always negative, the former can be either positive or negative.】
8、单选题：When the price of x rises, Marvin responds by changing his demand for x. The substitution effect is the part of this change that represents his change in demand:
A:none of all.
B:if his money income is held constant when the price of x changes.
C:holding the prices of substitutes constant.
D:if he is allowed to substitute as much x for y as he wishes.
正确答案:【none of all.】
9、单选题：nonnegative means ( )
A:
If price of good goes down, the change in the demand for the good due to the subtitution effect must be nonnegative
B:
For samll changes in price, Hicks and Slutsky definitions for substitution effects are nonnegative
C:If the price of a good goes up, if the good is a normal good, then it is nonnegative
D:If we have a normal good, the subtitution effect and the income effect work in is nonnegative.
正确答案:【
If price of good goes down, the change in the demand for the good due to the subtitution effect must be nonnegative
】
10、单选题：opposite to that of the price change, ( ) just like the sultsky substitution effect
A:SARP is both a necessary and a sufficient condition ( Unlike WARP) for what?
B:Hicks substitution effect
C:The substitution effect is
D:Hicks substitution effect must be in a direction
正确答案:【Hicks substitution effect must be in a direction】
第六章 单元测试
1、判断题：
If a rational utility maximizer is a net demander of a good, and if an increase in its price
causes him to buy more of it, then it must be an inferior good.
A:错
B:对
正确答案:【对】
2、判断题：
If a consumer is a buyer of some goods and a seller of others, then a change in prices will generate an extra income effect in the Slutsky equation due to the revaluation of the consumer’s endowment.
A:错
B:对
正确答案:【对】
3、判断题：If a utility maximizer is a net seller of something and the price of that good rises while other prices stay constant, her situation might improve so much that she becomes a net buyer
A:错
B:对
正确答案:【错】
4、单选题：
Marsha Mellow is very flexible. She consumes x and y. She says `Give me x or give me y; I don’t care. I can’t tell the difference between them.’ She is currently endowed with 14 units of x and 6 units of y. The price of x is 4 times the price of y. Marsha can trade x and y at the going prices, but has no other source of income. How many units of y will Marsha consume?
A:66
B:6
C:20
D:62
正确答案:【62】
5、单选题：
Yoram insists on consuming 3 times as much y as he consumes of x (so he always has y = 3x). He will consume these goods in no other ratio. The price of x is 2 times the price of y. Yoram has an endowment of 24 x0s and 42 y0s which he can trade at the going prices. He has no other source of income. What is Yoram’s gross demand for x?
A:66
B:16
C:90
D:18
正确答案:【18】
6、判断题：If leisure is a normal good, then an increase in non-labor income will reduce labor supply.
A:对
B:错
正确答案:【对】
7、单选题：Mr. Cog has 18 hours per day to divide between labor and leisure. His utility function is U (C,R) = CR; where C is dollars per year spent on consumption and R is hours of leisure. If he has a nonlabor income of 40 dollars per day and a wage rate of 8 dollars per hour, he will choose a combination of labor and leisure that allows him to spend:
A:82 dollars per day on consumption.
B:112 dollars per day on consumption.
C:92 dollars per day on consumption.
D:184 dollars per day on consumption.
正确答案:【92 dollars per day on consumption.】
8、单选题：If Abishag owns 12 quinces and 10 kumquats, and if the price of kumquats is 3 times the price of quinces, how many kumquats can she afford if she buys as many kumquats as she can?
A:22
B:10
C:14
D:28
正确答案:【14】
9、单选题：If Abishag owns 16 quinces and 15 kumquats, and if the price of kumquats is 4 times the price of quinces, how many kumquats can she afford if she buys as many kumquats as she can?
A:19
B:15
C:38
D:31
正确答案:【19】
10、判断题：The share price of Grath Oil is currently $77.06. Several months ago, when the price was $51.21, Charles bought 186 shares of Grath Oil. If he sells all of his stock in Grath Oil today, how much profit will he make? → $1,504.17
A:错
B:对
正确答案:【错】
第七章 单元测试
1、判断题：Consumer’s surplus is another name for excess demand.
A:对
B:错
正确答案:【错】
2、判断题：The equivalent variation in income from a tax is the amount of extra income that a consumer would need in order to be as well off after the tax is imposed as he was originally.
A:对
B:错
正确答案:【错】
3、判断题：With quasilinear preferences, the equivalent variation and the compensating variation in income due to a tax are the same.
A:错
B:对
正确答案:【对】
4、单选题：Ella’s utility function is min{4x,y}. If the price of x is 15 and the price of y is 20, howmuch money would she need to be able to purchase a bundle that she likes as well as the bundle(x,y) = (5,8)?
A:235
B:92
C:198
D:190
正确答案:【190】
5、单选题：Sam’s utility function is U (x,y)=2x + y where x is the number of x’s he consumes per week and y is the number of y’s he consumes per week. Sam has $200 a week to spend. The price of x is 4. Sam currently doesn’t consume any y. Sam has received an invitation to join a club devoted to consumption of y. If he joins the club, Sam can get a discount on the purchase of y. If he belonged to the club he could buy y for $1 a unit. How much is the most Sam would be willing to pay to join this club?
A:$50 a week
B:$100 a week
C:$40 a week
D:nothing
正确答案:【$100 a week】
6、单选题：Sir Plus has a demand function for mead that is given by the equation D(p) = 100-P.If the price of mead is 75, how much is Sir Plus’s net consumer surplus?
A:25
B:312.5
C:156.25
D:625
正确答案:【312.5】
7、单选题：Sam has quasilinear preferences and his demand function for x is D(p) = 15-p/3.The price of x is initially $15 per unit and increases to $24 per unit. Sam’s change is consumer surplus is the closest to:
A:-27
B:75
C:-76
D:-168
正确答案:【-76】
8、单选题：At the initial prices, Teodoro is a net seller of apples and a net buyer of bananas. If the price of apples decreases and the price of bananas does not change:
A:both the compensating variation and the equivalent variation must be negative.
B:both the compensating variation and the equivalent variation must be positive.
C:the compensating variation must be positive and the equivalent variation negative.
D:the compensating variation must be negative and the equivalent variation positive.
正确答案:【both the compensating variation and the equivalent variation must be positive.】
9、单选题：( ) is the difference between what consumers are willing and able to pay for a good and what they actually pay for the good.
A:marginal product
B:measures of cost
C:Demand curves
D:Consumer Surplus
正确答案:【Consumer Surplus】
10、单选题：( ) depict the various quantities that buyers would be willing and able topurchase at different prices
A:Demand curves
B:Average costs
C:Consumer surplus
D:Fixed cost
正确答案:【Demand curves】
第八章 单元测试
1、判断题：
The inverse demand curve P (x) for a good x measures the price per unit at which the quantity x would be demanded.
A:对
B:错
正确答案:【对】
2、判断题：
If a price changes, then changes in consumption at the intensive margin are changes that happen because consumers alter the amounts that they consume, but do not either stop consuming or start consuming the good.
A:对
B:错
正确答案:【对】
3、判断题：
If the demand function is q = 3m=p; where m is income and p is price, then the absolute value of the price elasticity of demand decreases as price increases.
A:错
B:对
正确答案:【错】
4、单选题：A peck is 1/4 of a bushel. If the price elasticity of demand for bran is -0.2 when bran ismeasured in bushels, then when bran is measured in pecks, the price elasticity of demand for bran will be:
A:-0.1
B:None of all
C:-0.05
D:-0.8
正确答案:【None of all】
5、判断题：Marginal revenue is equal to price if the demand curve is horizontal.
A:错
B:对
正确答案:【对】
6、单选题：The constant elasticity of demand for cigarettes has been estimated to be 0.5. To reduce smoking by 75%, approximately how much tax needs to be added to a $1 pack?
A:$2.25
B:$0.75
C:$0.38
D:$1.5
正确答案:【$1.5】
7、单选题：Market demand relevant to industry marketing expenditure show infinity, is said to be ( )
A:market potential
B:share potential
C:market demand
D:product potential
正确答案:【market potential】
8、单选题：( )Occurs when the quantity demanded changes little as price changes
A:Fixed cost
B:Elastic
C:unit elastic
D:Inelastic
正确答案:【Inelastic】
9、判断题：Elasticity of Demand means a measure of how responsive consumers are to price changes.
A:对
B:错
正确答案:【对】
10、判断题：Price Floor means a legal minimum price that buyers must pay for a product.
A:错
B:对
正确答案:【对】
第九章 单元测试
1、判断题：
If the supply curve is vertical, then the amount supplied is independent of price.
A:错
B:对
正确答案:【对】
2、判断题：The supply curve slopes up and to the right. If the demand curve shifts upward to a new curve which is everywhere higher than the old curve (but possibly of different slope) and if the supply curve does not shift, then the equilibrium price and quantity must necessarily increase.
A:错
B:对
正确答案:【对】
3、判断题：An economic situation is Pareto optimal only if there is no way to make someone better off.
A:错
B:对
正确答案:【错】
4、单选题：The demand for pickles is given by p=131-2q and supply is given by p=5+7q. What is the equilibrium quantity?
A:14
B:11
C:103
D:19
正确答案:【14】
5、单选题：The demand function for fresh strawberries is q = 200-5p and the supply function isq=60+2p. What is the equilibrium price?
A:40
B:50
C:10
D:20
正确答案:【20】
6、判断题：If a quantity tax is collected from competitive suppliers of a good, placing a tax on the good causes the price paid by consumers to increase more than if the tax had been collected directly from the buyers.
A:对
B:错
正确答案:【错】
7、单选题：The demand function for x is D(p) = 65-2p and the supply function is S(p) = 20 + p. The price that should be set to restrict quantity supplied to 30 units is closest to:
A:15
B:5
C:10
D:50
正确答案:【10】
8、单选题：The demand function for rental apartments is q = 960-7p and the supply function is q = 160 + 3p. The government makes it illegal to charge a rent higher than 35. How much excess demand will there be?
A:726
B:149
C:450
D:364
正确答案:【450】
9、单选题：( )factors other than price that locate the position of a demand curve1. consumers’ tastes2. of consumers in the market3. consumers’ incomes4. the prices of related goods5. expected pricesSHIFTS the curve
A:inferior good
B:determinants of demand
C:determinants of supply
D:normal good
正确答案:【determinants of demand】
10、单选题：a good (or service) whose consumption declines as income rises and increases as income decreases
increase in income=decrease in consumptiondecrease in income=increase in consumption
A:price floor
B:substitute good
C:inferior good
D:normal good
正确答案:【inferior good】
第十章 单元测试
1、判断题：The production set of a firm is the set of all products the firm can produce.
A:对
B:错
正确答案:【错】
2、判断题：A production isoquant is a locus of combinations of inputs that are equally profitable.
A:对
B:错
正确答案:【错】
3、单选题：If a firm moves from one point on a production isoquant to another point on the same isoquant, which of the following will certainly NOT happen?
A:a change in the marginal products of the inputs
B:a change in the ratio in which the inputs are combined
C:a change in the rate of technical substitution
D:a change in the level of output
正确答案:【a change in the level of output】
4、单选题：In any production process, the marginal product of labor equals:
A:total output divided by total labor inputs.
B:total output produced with the given labor inputs.
C:the change in output per unit change in labor input for ‘small’ changes in the amount of input.
D:the value of total output minus the cost of the fixed capital stock.
正确答案:【the change in output per unit change in labor input for ‘small’ changes in the amount of input.】
5、判断题：The production function f (x,y) = x + y has constant returns to scale
A:对
B:错
正确答案:【对】
6、单选题：The production function Q = 50K0.75L0.75 exhibits
A:
decreasing returns to scale.
B:
increasing returns to scale.
C:
constant returns to scale.
D:
increasing, then diminishing returns to scale.
正确答案:【
increasing returns to scale.
】
7、单选题：A firm has a production function f (x,y)=1:10(x0.20 + y0.20)5 whenever x > 0 and y > 0.
A:
decreasing returns to scale.
B:
increasing returns to scale if x + y > 1 and decreasing returns to scale otherwise.
C:
constant returns to scale.
D:
increasing returns to scale.
正确答案:【
increasing returns to scale.
】
8、单选题：( ) means the relationship between the inputs employed by a firm and the max output it can produce with those inputs.-Technology is process to turn in to out production function represents firms technology
A:Production function
B:Average total cost
C:Graphing production
D:constant returns to scale
正确答案:【Production function】
9、判断题：At some pint adding more of a variable input, such as labor, to the same amount of a fixed input, such as capital, will cause the marginal product of the variable input to decline–MPL could become negative if workers got in each other’s way but no firm would hire to this point
A:错
B:对
正确答案:【对】
10、单选题：Does ( ) decline eventually as the number of workers increases
A:MPL
B:Minimum efficient scale
C:average fixed cost
D:total cost
正确答案:【MPL】
第十一章 单元测试
1、判断题：The marginal product of a factor is just the derivative of the production function with respect to the amount of this factor, holding the amounts of other factor inputs constant.
A:对
B:错
正确答案:【对】
2、判断题：The weak axiom of profit maximizing behavior states that in a modern mixed economy, firms have only a weak incentive to maximize profits.
A:错
B:对
正确答案:【错】
3、判断题：A fixed factor is a factor of production that is used in fixed proportion to the level of output.
A:对
B:错
正确答案:【错】
4、单选题：A competitive firm produces output using three fixed factors and one variable factor. The firm’s short run production function is , where x is the amount of variable factor used. The price of output is $3 per unit and the price of the variable factor is $9 per unit. In the short run, how many units of x should the firm use?
A:40
B:80
C:19
D:20
正确答案:【40】
5、单选题：A profit-maximizing competitive firm uses just one input, x. Its production function is q = 8×1/2. The price of output is 16 and the factor price is 8. The amount of the factor that the firm demands is:
A:48
B:22.63
C:10
D:64
正确答案:【64】
6、判断题：Just as in the theory of utility maximizing consumers, the theory of profit maximizing firms allows the possibility of “Giffen factors”. These are factors for which a fall in price leads to a fall in demand.
A:错
B:对
正确答案:【错】
7、单选题：The production function is given by F (L)=6L2/3 . Suppose that the cost per unit of labor is 12 and the price of output is 6, how many units of labor will the firm hire?
A:
16
B:
4
C:
24
D:
8
正确答案:【
8
】
8、单选题：When Farmer Hoglund applies N pounds of fertilizer per acre, the marginal product of fertilizer is 1-(N=200) bushels of corn. If the price of corn is $1 per bushel and the price of fertilizer is $0.40 per pound, then how many pounds of fertilizer per acre should Farmer Hoglund use in order to maximize his profits?
A:120
B:248
C:64
D:240
正确答案:【120】
9、单选题：A competitive firm produces output using three fixed factors and one variable factor. The firm’s short run production function is q=163x-2×2, where x is the amount of variable factor used. The price of output is $3 per unit and the price of the variable factor is $9 per unit. In the short run, how many units of x should the firm use?
A:
19
B:
20
C:
40
D:
80
正确答案:【
40
】
10、单选题：Which of the following is a short-run adjustment?
A:
The number of farms in the United States declines by 5 percent
B:
A local bakery hires two additional bakers
C:
Six new firms enter the plastics industry
D:
BMW constructs a new assembly plant in South Carolina
正确答案:【
A local bakery hires two additional bakers
】
第十二章 单元测试
1、判断题：In a perfectly competitive industry, the demand curve for the total output of the industry may be downward sloping.
A:错
B:对
正确答案:【对】
2、判断题：Price equals marginal cost is a sufficient condition for profit maximization
A:错
B:对
正确答案:【错】
3、单选题：A profit maximizing dairy farm is currently producing 10,000 gallons of milk per day. The government is considering two alternative policies. One is to give the farm a lump sum subsidy of $500 per month. The other policy is to give the farm a subsidy of $.05 per gallon of output.
A:
Production will be increased by either kind of subsidy if and only if there are not decreasing returns to scale.
B:
Which subsidy has the greater effect on production at this farm depends on whether fixed costs are greater than variable costs.
C:
Neither subsidy will affect production at this farm, since output is determined by profit maximization.
D:
Production at this farm will be increased if the per unit subsidy is adopted, but not if the lump-sum subsidy is adopted.
E:
Both kinds of subsidy will increase production at this farm.
正确答案:【
Production at this farm will be increased if the per unit subsidy is adopted, but not if the lump-sum subsidy is adopted.
】
4、判断题：The cost function c(w1,w2,y) expresses the cost per unit of output of producing y units of output if equal amounts of both factors are used.
A:对
B:错
正确答案:【错】
5、单选题：If it costs $10 to set up and later clean a bagel press and bagels cost $1 per week, per bagel, to store, how many times should the bagel press be run each week to produce 500 bagels a week to be sold continuously?
A:4 times
B:Twice
C:3 times.
D:Once.
正确答案:【3 times.】
6、单选题：If output is produced according to Q = 4LK, the price of K is $10, and the price of L is$10, then the cost minimizing combination of K and L capable of producing 16 units of output is
A:L = 8 and K = 8
B:L = 4 and K = 1
C:L = 2 and K = 2
D:L = 1 and K = 1
正确答案:【L = 2 and K = 2】
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