2021知到答案 中级微观经济学（双语）（山东联盟） 最新智慧树满分章节测试答案

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.

选项：
A:对
B:错
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.

选项：
A:对
B:错
答案: 【对】

3、判断题：
An Engel curve is a demand curve with the vertical and horizontal axes reversed.

选项：
A:对
B:错
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?
选项：
A:

4

B:

6

C:

2

D:

8

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?

选项：
A:32
B:40
C:24
D:16
答案: 【16】

6、判断题：
Quasilinear preferences are homothetic when the optimal amount of one of the goods is not affordable.
选项：
A:对
B:错
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?
选项：
A:Walt demands 10 cartons of cream.
B:Walt demands 10 boxes of strawberries.
C:Walt considers strawberries and cartons of cream to be perfect substitutes.
D:Walt demands 12 boxes of strawberries.
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?
选项：
A:Her demand for one of the two goods does not depend on income.
B:Her demand for neither good depends on income.
C:Her demand for each of the goods depends on income and on the prices of both goods.
D:Her demand for each of the two goods depends only on her income and on the price of that good itself.
答案: 【Her demand for each of the two goods depends only on her income and on the price of that good itself.】

9、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?
选项：
A:4
B:6
C:2
D:8
答案: 【4】

10、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?
选项：
A:32
B:40
C:24
D:16
答案: 【16】

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.

选项：
A:对
B:错
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.

选项：
A:对
B:错
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.

选项：
A:对
B:错
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?
选项：
A:A is directly revealed preferred to B.
B: A is indirectly revealed preferred to B.
C:C is directly revealed preferred to A.
D:None of the above
答案: 【None of the above】

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?

选项：
A: 3.36
B:  2.43
C:0.30
D: 1.52
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.
选项：
A:对
B:错
答案: 【错】

7、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?
选项：
A:A is directly revealed preferred to B.
B:A is indirectly revealed preferred to B.
C:C is directly revealed preferred to A.
D:None of the above
答案: 【None of the above】

8、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?
选项：
A:3.36
B:2.43
C:0.30
D:1.52
答案: 【2.43】

9、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?
选项：
A:Yes
B:No
C:It depends on his income.
D:We would have to observe a third choice to be able to say.
答案: 【Yes】

10、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:
选项：
A:made her worse off
B:left her exactly as well off  as before.
C:left her at least as well off  as before and possibly helped her.
D:had the same effect as a $3 increase in her income.
答案: 【left her at least as well off  as before and possibly helped her.】

第五章 单元测试

1、判断题：
A Giffen good must be an inferior good.

选项：
A:对
B:错
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.

选项：
A:对
B:错
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.

选项：
A:对
B:错
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?
选项：
A:The income effect increases the quantity of y by 90．
B:The substitution effect increases the quantity of y by 80.
C:The substitution effect increases the quantity of x by 90
D:The income effect increases the quantity of x by 80.
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.
选项：
A:His Slutsky compensated demand curve going through this point is steeper than his ordinary demand curve.
B:His ordinary demand curve going through this point is steeper than his Slutsky compensated demand curve.
C:His ordinary demand curve is steeper to the left and his Slutsky compensated demand curve is steeper to the right of this point.
D:Whether his ordinary demand curve or his compensated demand curve is steeper, depends on whether his price elasticity is greater than 1.
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.
选项：
A:对
B:错
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:
选项：
A:The former is always positive and the latter is always negative.
B:Both can be either positive or negative.
C:While the latter is always negative, the former can be either positive or negative.
D:While the former is always negative, the latter can be either positive or negative.
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:
选项：
A:holding the prices of substitutes constant.
B:if he is allowed to substitute as much x for y as he wishes.
C:if his money income is held constant when the price of x changes.
D:none of the above.
答案: 【none of the above.】

9、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?
选项：
A:The income effect increases the quantity of y by 90．
B:The substitution effect increases the quantity of y by 80.
C:The substitution effect increases the quantity of x by 90.
D:The income effect increases the quantity of x by 80.
答案: 【The substitution effect increases the quantity of x by 90.】

10、单选题：
Suppose that bananas are a normal good and Woody is currently consuming 100 bananas at a price of 10 cents each.
选项：
A:

His Slutsky compensated demand curve going through this point is steeper than his ordinary demand curve.

B:

His ordinary demand curve going through this point is steeper than his Slutsky compensated demand curve.

C:

His ordinary demand curve is steeper to the left and his Slutsky compensated demand curve is steeper to the right of this point.

D:

Whether his ordinary demand curve or his compensated demand curve is steeper, depends on whether his price elasticity is greater than 1.

答案: 【

His Slutsky compensated demand curve going through this point is steeper than his ordinary demand curve.

】

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.

选项：
A:对
B:错
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.

选项：
A:对
B:错
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

选项：
A:对
B:错
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?

选项：
A:66
B: 20
C:62
D:6
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?
选项：
A:90
B:66
C:18
D:16
答案: 【18】

6、判断题：
If leisure is a normal good, then an increase in non-labor income will reduce labor supply.
选项：
A:对
B:错
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:
选项：
A:184 dollars per day on consumption.
B:82 dollars per day on consumption.
C:112 dollars per day on consumption.
D:92 dollars per day on consumption.
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?
选项：
A:28
B:22
C:10
D:14
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?
选项：
A:38
B:31
C:15
D:19
答案: 【19】

10、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 x’s and 42 y’s which he can trade at the going prices. He has no other source of income. What is Yoram’s gross demand for x?
选项：
A:90
B:66
C:18
D:16
答案: 【18】

第七章 单元测试

1、判断题：
Consumer’s surplus is another name for excess demand.
选项：
A:对
B:错
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.

选项：
A:对
B:错
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.

选项：
A:对
B:错
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, how　much money would she need to be able to purchase a bundle that she likes as well as the bundle(x,y) = (5,8)?

选项：
A:92

B:198
C:190
D:235
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?

选项：
A: nothing
B:$100 a week
C:$50 a week
D: $40 a week
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?
选项：
A:25
B:312.5
C:625
D:156.25
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:
选项：
A:-168
B:-76
C:-27
D:75
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:
选项：
A:the compensating variation must be negative and the equivalent variation positive.
B:the compensating variation must be positive and the equivalent variation negative.
C:both the compensating variation and the equivalent variation must be positive.
D:both the compensating variation and the equivalent variation must be negative.
答案: 【both the compensating variation and the equivalent variation must be positive.】

9、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, how　much money would she need to be able to purchase a bundle that she likes as well as the bundle(x,y) = (5,8)?
选项：
A:92
B:198
C:190
D:235
答案: 【190】

10、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?
选项：
A:nothing
B:$100 a week
C: $50 a week
D:$40 a week
答案: 【$100 a week】

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.

选项：
A:对
B:错
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.

选项：
A:对
B:错
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.

选项：
A:对
B:错
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 is　measured in bushels, then when bran is measured in pecks, the price elasticity of demand for bran will be:
选项：
A:-0.05
B: -0.8
C:-0.1
D: None of the above.
答案: 【 None of the above.】

5、单选题：
The demand function is described by the equation q(p) = 190- p/5. The inverse demand function is described by:
选项：
A:q(p) = 190 -5p.
B:p(q) = 950 -5q.
C:q(p)=1/(190 -p/5).
D:p(q)=1/190 -q/5.
答案: 【p(q) = 950 -5q.】

6、判断题：
Marginal revenue is equal to price if the demand curve is horizontal.
选项：
A:对
B:错
答案: 【对】

7、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?
选项：
A:$0.38
B:$0.75
C:$1.5
D:$2.25
答案: 【$1.5】

8、单选题：
If the marginal cost of brewing beer is 40 cents and the profit maximizing price is 80 cents,then the price elasticity of demand is
选项：
A:-0.66
B:-1.8
C:-2
D:-2.33
答案: 【-2.33】

9、单选题：
A peck is 1/4 of a bushel. If the price elasticity of demand for bran is -0.2 when bran is　measured in bushels, then when bran is measured in pecks, the price elasticity of demand for bran will be:
选项：
A:-0.05
B:-0.8
C:-0.1
D:None of the above.
答案: 【None of the above.】

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.

选项：
A:对
B:错
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.

选项：
A:对
B:错
答案: 【对】

3、判断题：
An economic situation is Pareto optimal only if there is no way to make someone better off.

选项：
A:对
B:错
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?

选项：
A:11
B:14
C:19
D:103
答案: 【14】

5、单选题：
The demand function for fresh strawberries is q = 200-5p and the supply function is　q=60+2p. What is the equilibrium price?

选项：
A:10
B:20
C:40
D:50
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.
选项：
A:对
B:错
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:
选项：
A:5
B:10
C:15
D:50
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?
选项：
A:149
B:450
C:364
D:726
答案: 【450】

9、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?
选项：
A:11
B:14
C:19
D:103
答案: 【14】

10、单选题：
The demand function for fresh strawberries is q = 200-5p and the supply function is　q=60+2p. What is the equilibrium price?
选项：
A:10
B:20
C:40
D:50
答案: 【20】

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.
选项：
A:对
B:错
答案: 【错】

2、判断题：
A production isoquant is a locus of combinations of inputs that are equally profitable.
选项：
A:对
B:错
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?
选项：
A:a change in the level of output
B:a change in the ratio in which the inputs are combined
C:a change in the marginal products of the inputs
D:a change in the rate of technical substitution
答案: 【a change in the level of output】

4、单选题：
In any production process, the marginal product of labor equals:
选项：
A:the value of total output minus the cost of the fixed capital stock.
B:the change in output per unit change in labor input for ‘small’ changes in the amount of input.
C:total output divided by total labor inputs.
D:total output produced with the given labor inputs.
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 inverse demand curve P (x) for a good x measures the price per unit at which the quantity x would be demanded.

选项：
A:对
B:错
答案: 【对】

6、判断题：
The production function f (x,y) = x + y has constant returns to scale
选项：
A:对
B:错
答案: 【对】

7、单选题：
The production function Q = 50K0.75L0.75 exhibits
选项：
A:increasing returns to scale.
B:constant returns to scale.
C:decreasing returns to scale.
D:increasing, then diminishing returns to scale.
答案: 【increasing returns to scale.】

8、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.
选项：
A:increasing returns to scale.
B:decreasing returns to scale.
C:constant returns to scale.
D:increasing returns to scale if x + y > 1 and decreasing returns to scale otherwise.
答案: 【increasing returns to scale.】

9、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?
选项：
A:a change in the level of output
B:a change in the ratio in which the inputs are combined
C:a change in the marginal products of the inputs
D:a change in the rate of technical substitution
答案: 【a change in the level of output】

10、单选题：
In any production process, the marginal product of labor equals:
选项：
A:The value of total output minus the cost of the fixed capital stock.
B:the change in output per unit change in labor input for small changes in the amount of input.
C:total output divided by total labor inputs.
D:total output produced with the given labor inputs.
答案: 【the change in output per unit change in labor input for small changes in the amount of input.】

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.
选项：
A:对
B:错
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.
选项：
A:对
B:错
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.
选项：
A:对
B:错
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?
选项：
A:20
B:80
C:19
D:40
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:
选项：
A:10

B:22.63
C:64
D:48
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.
选项：
A:对
B:错
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?
选项：
A:16
B:8
C:4
D:24
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?
选项：
A:120
B:240
C:64
D:248
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?
选项：
A:20
B:80
C:19
D:40
答案: 【40】

10、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:
选项：
A:10
B:22.63
C:64
D:48
答案: 【64】

第十二章 单元测试

1、判断题：
A firm in a competitive industry takes account of the fact that the demand curve it confronts has a significant negative slope.
选项：
A:对
B:错
答案: 【错】

2、判断题：
In a perfectly competitive industry, the demand curve for the total output of the industry may be downward sloping.
选项：
A:对
B:错
答案: 【对】

3、判断题：
Price equals marginal cost is a sufficient condition for profit maximization

选项：
A:对
B:错
答案: 【错】

4、单选题：
A profit maximizing firm continues to operate even though it is losing money. It sells its product at a price of $100. From these facts we deduce that:
选项：
A:average total cost is less than $100.
B:average fixed cost is less than $100.
C:marginal cost is increasing.
D:average variable cost is less than $100.
答案: 【average variable cost is less than $100.】

5、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.
选项：
A:Both kinds of subsidy will increase production at this farm.
B:Neither subsidy will affect production at this farm, since output is determined by profit maximization.
C:Production at this farm will be increased if the per unit subsidy is adopted, but not if the lump-sum subsidy is adopted.
D:Which subsidy has the greater effect on production at this farm depends on whether fixed costs are greater than variable costs.
E:Production will be increased by either kind of subsidy if and only if there are not decreasing returns to scale.
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.】

6、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.
选项：
A:对
B:错
答案: 【错】

7、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?
选项：
A:Once.
B:Twice
C:3 times.
D:4 times
答案: 【3 times.】

8、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
选项：
A:L = 4 and K = 1
B:L = 2 and K = 2
C:L = 1 and K = 1
D:L = 8 and K = 8
答案: 【L = 2 and K = 2】

9、判断题：
The average variable cost curve must always be U shaped.
选项：
A:对
B:错
答案: 【错】

10、判断题：
The marginal cost curve passes through the minimum point of the average fixed cost curve.
选项：
A:对
B:错
答案: 【错】

第十三章 单元测试

1、判断题：
A firm in a competitive industry takes account of the fact that the demand curve it confronts has a significant negative slope.
选项：
A:对
B:错
答案: 【错】

2、判断题：
In a perfectly competitive industry, the demand curve for the total output of the industry may be downward sloping.
选项：
A:对
B:错
答案: 【对】

3、判断题：
Price equals marginal cost is a sufficient condition for profit maximization

选项：
A:对
B:错
答案: 【错】

4、单选题：
A profit maximizing firm continues to operate even though it is losing money. It sells its product at a price of $100. From these facts we deduce that:
选项：
A:average total cost is less than $100.
B:average fixed cost is less than $100.
C:marginal cost is increasing.
D:average variable cost is less than $100.
答案: 【average variable cost is less than $100.】

5、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.
选项：
A:Both kinds of subsidy will increase production at this farm.
B:Neither subsidy will affect production at this farm, since output is determined by profit maximization.
C:Production at this farm will be increased if the per unit subsidy is adopted, but not if the lump-sum subsidy is adopted.
D:Which subsidy has the greater effect on production at this farm depends on whether fixed costs are greater than variable costs.
E:Production will be increased by either kind of subsidy if and only if there are not decreasing returns to scale.
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.】

6、判断题：
The change in producer’s surplus when the market price changes from p1 to p2 is half of the area to the left of the marginal cost curve between p1 and p2.
选项：
A:对
B:错
答案: 【错】

7、单选题：
A firm has the long run cost function C(q)=4q2 + 4. In the long run, it will supply a positive amount of output, so long as the price is greater than:

选项：
A:16
B:24
C:4
D:8
答案: 【8】

8、单选题：
Suppose that Dent Carr’s long run total cost of repairing s cars per week is c(s)=3s2 + 27.If the price he receives for repairing a car is 30, then in the long run, how many cars will he fix perweek if he maximizes profits?

选项：
A:5
B:0
C:10
D:7.5
答案: 【5】

9、单选题：
A profit maximizing firm continues to operate even though it is losing money. It sells its product at a price of $100. From these facts we deduce that:
选项：
A:average total cost is less than $100.
B:average fixed cost is less than $100.
C:marginal cost is increasing.
D:average variable cost is less than $100.
答案: 【average variable cost is less than $100.】

10、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.
选项：
A:Both kinds of subsidy will increase production at this farm.
B:Production at this farm will be increased if the per unit subsidy is adopted, but not if the lump-sum subsidy is adopted.
C:Which subsidy has the greater effect on production at this farm depends on whether fixed costs are greater than variable costs.
D:Production will be increased by either kind of subsidy if and only if there are not decreasing returns to scale.
答案: 【Which subsidy has the greater effect on production at this farm depends on whether fixed costs are greater than variable costs.】

第十四章 单元测试

1、单选题：
Microsoft is a/an ___ in Windows operating system.

选项：
A:monopoly
B:competitive firm
C:oligopoly
D: monopsony
答案: 【monopoly】

2、单选题：
Monopoly is ___.
选项：
A:price taker
B:price maker
C:quantity taker
D:quantity maker
答案: 【price maker】

3、单选题：
Monopoly maximizes its profit mainly rely on its ___.
选项：
A:supply curve
B:demand curve
C:cost curve
D:demand curve and cost curve
答案: 【demand curve and cost curve】

4、单选题：
When monopolistic profit has been maximized, its marginal cost is ___ than its marginal revenue.
选项：
A:bigger
B: smaller
C: equal to
D: all above options are
答案: 【 equal to】

5、单选题：
Deadweight loss of monopoly is ___.

选项：
A:good for consumers
B:bad for producer
C:good for the society
D:bad for the society
答案: 【bad for the society】

6、判断题：
For a monopolist who faces a downward sloping demand curve, marginal revenue is less than price whenever quantity sold is positive.
选项：
A:对
B:错
答案: 【对】

7、单选题：
Monopoly is ___.
选项：
A:price taker
B:price maker
C:quantity taker
D:quantity maker
答案: 【price maker】

8、单选题：
Monopoly maximizes its profit mainly rely on its ___.
选项：
A:supply curve
B:demand curve
C:cost curve
D:demand curve and cost curve
答案: 【demand curve and cost curve】

9、单选题：
When monopolistic profit has been maximized, its marginal cost is ___ than its marginal revenue.
选项：
A:bigger
B:smaller
C:equal to
D:all above options are possible
答案: 【equal to】

10、单选题：
Deadweight loss of monopoly is ___.
选项：
A:good for consumers
B:bad for producer
C:good for the society
D:bad for the society
答案: 【bad for producer】

第十五章 单元测试

1、单选题：
A monopolist is able to practice third degree price discrimination between two markets. The demand function in the first market is q = 500-2p and the demand function in the second market is q = 1500-6p. To maximize his profits, he should:
选项：
A:charge a higher price in the second market than in the first.
B:charge a higher price in the first market than in the second.
C:charge the same price in both markets.
D:sell only in one of the two markets.
答案: 【charge the same price in both markets.】

2、单选题：
A monopolist finds that a person’s demand for its product depends on the person’s age. The inverse demand function of someone of age y; can be written p = A(y)-q where A(y) is an increasing function of y. The product cannot be resold from one buyer to another and the monopolist knows the ages of its consumers. If the monopolist maximizes its profits:

选项：
A: older people will pay higher prices and purchase less of this product.
B:older people will pay higher prices and purchase more of this product.
C:older people will pay lower prices and purchase more of this product.
D: everyone pays the same price but old people consume more.
答案: 【older people will pay higher prices and purchase more of this product.】

3、单选题：
A monopolist has discovered that the inverse demand function of a person with income M for the monopolist’s product is p = 0.002M-q. The monopolist is able to observe the incomes of its consumers and to practice price discrimination according to income (second-degree price discrimination). The monopolist has a total cost function, c(q) = 100q. The price it will charge a consumer depends on the consumer’s income, M; according to the formula:
选项：
A:p = 0.001M + 50.
B:p = 0.002M-100.
C:p = M2.
D:p = 0.01M2 + 100.
答案: 【p = 0.001M + 50.】

4、单选题：
Wobble’s Weebles is the only producer of weebles. It makes weebles at constant marginal cost c (where c > 0) and sells them at a price of p1 per weeble in Market 1 and at a price of p2 per weeble in Market 2. The demand curve for weebles in Market 1 has a constant price elasticity of demand equal to -2. The demand curve for weebles in Market 2 has a constant price elasticity equal to -3/2. The ratio of the profit maximizing price in Market 1 to the profit maximizing price in Market 2 is:

选项：
A: 2/3
B:1/3
C:3/2
D: 3
答案: 【 2/3】

5、判断题：
Third degree price discrimination occurs when a monopolist sells output to different people at different prices, but every unit that an individual buys costs the same amount.
选项：
A:对
B:错
答案: 【对】

6、单选题：
A monopolist finds that a person’s demand for its product depends on the person’s age. The inverse demand function of someone of age y; can be written p = A(y) function of y. The product cannot be resold from one buyer to another and the monopolist knows the ages of its consumers. If the monopolist maximizes its profits:
选项：
A:older people will pay higher prices and purchase less of this product.
B:older people will pay higher prices and purchase more of this product.
C:older people will pay lower prices and purchase more of this product.
D:everyone pays the same price but old people consume more.
答案: 【older people will pay lower prices and purchase more of this product.】

7、单选题：
A monopolist finds that a person’s demand for its product depends on the person’s age. The inverse demand function of someone of age y; can be written p = A(y)-q where A(y) is an increasing function of y. The product cannot be resold from one buyer to another and the monopolist knows the ages of its consumers. If the monopolist maximizes its profits:
选项：
A:older people will pay higher prices and purchase less of this product.
B:older people will pay higher prices and purchase more of this product.
C:older people will pay lower prices and purchase more of this product.
D:everyone pays the same price but old people consume more.
答案: 【older people will pay higher prices and purchase more of this product.】

8、单选题：
A monopolist has discovered that the inverse demand function of a person with income M for the monopolist’s product is p = 0.002M-q. The monopolist is able to observe the incomes of its consumers and to practice price discrimination according to income (second-degree price discrimination). The monopolist has a total cost function, c(q) = 100q. The price it will charge a consumer depends on the consumer’s income, M; according to the formula:
选项：
A:p = 0.001M + 50.
B:p = 0.002M-100.
C:p = M2.
D:p = 0.01M2 + 100.
答案: 【p = 0.001M + 50.】

9、单选题：
Wobble’s Weebles is the only producer of weebles. It makes weebles at constant marginal cost c (where c > 0) and sells them at a price of p1 per weeble in Market 1 and at a price of p2 per weeble in Market 2. The demand curve for weebles in Market 1 has a constant price elasticity of demand equal to -2. The demand curve for weebles in Market 2 has a constant price elasticity equal to -3/2. The ratio of the profit maximizing price in Market 1 to the profit maximizing price in Market 2 is:
选项：
A:2/3.
B:1/3.
C:3/2.
D:3
答案: 【2/3.】

10、单选题：
A monopolist sells in two markets. The demand curve for her product is given by p1 = 303-3*x1 in the first market and p2 = 253-5*x2 in the second market, where xi is the quantity sold in Market i and pi is the price charged in Market i. She has a constant marginal cost of production, c = 3; and no fixed costs. She can charge different prices in the two markets. What is the profit-maximizing combination of quantities for this monopolist?
选项：
A:x1 = 100 and x2 = 27
B:x1 = 50 and x2 = 25
C:x1 = 75 and x2 = 50
D:x1 = 60 and x2 = 23
答案: 【x1 = 50 and x2 = 25】

第十六章 单元测试

1、单选题：
A monopolist produces a good using only one factor, labor. There are constant returns to scale in production, and the demand for the monopolist’s product is described by a downward sloping straight line with slope –1. The monopolist faces a horizontal labor supply curve. If the monopolist chooses output to maximize profits, then the:

选项：
A:marginal cost of labor to the monopolist exceeds the wage.
B:marginal product of labor times price of output equals the wage.
C:marginal product of labor times price of output is less than the wage.
D:marginal product of labor times price of output exceeds the wage.
答案: 【marginal product of labor times price of output exceeds the wage.】

2、单选题：
If a monopsonist pays the wage rate w; then the amount of labor that he can hire is L(w) = Aw, where A is a positive constant. The marginal cost of labor to the monopsonist is:
选项：
A:equal to the wage rate.
B:twice the wage rate.
C: half the wage rate.
D: greater than the wage rate but less than twice as great.
答案: 【twice the wage rate.】

3、单选题：
A profit-maximizing monopsonist hires both men and women to do a certain task. The two sexes are equally good at this task and are regarded as perfect substitutes. Labor supply curves for both sexes are upward-sloping. In order to hire M men, the firm would have to pay men a wage of AM, where A is a positive constant. In order to hire F women, the monopsonist would have to pay a wage of BF^c where B and c are positive constants. Which, if any, of these conditions necessarily implies that he pays a lower wage to women than to men?

选项：
A:A > B .
B:A < c.
C:c < 1.
D: Bc < A
答案: 【c < 1.】

4、单选题：
The frangle industry is a monopoly, with a demand curve 100-p; where p is the price of frangles. It takes one unit of labor and no other inputs to produce a frangle. The Frangle-makers Guild is a strong union. The Guild sets a wage and prevents anyone from working for less than that wage. The frangle monopoly must pay that wage but can hire as much labor as it chooses to.If the guild chooses a wage so as to maximize the total earnings (wage times number of units of labor hired) of frangle-makers, then:

选项：
A:the price of frangles will be 50.
B:the price of frangles will be 25.
C:the price of frangles will equal the wage rate.
D:the wage will be 50.
答案: 【the wage will be 50.】

5、单选题：
The bauble industry is competitive with free entry. There is a fixed-coefficient technology. One unit of labor and one unit of plastic are required for each bauble. Workers in the bauble industry must all belong to the Bauble-makers Union. The union sets the wage that will be paid to all bauble-makers. The price of plastic is 10 dollars per unit and the demand function for baubles is 1000-10p. Long run equilibrium requires that the price of baubles equals the cost of production. The wage per unit of labor that maximizes total revenue of workers is:
选项：
A:100
B:10
C:45
D:20
答案: 【45】

6、判断题：
A coal producer has a monopoly on coal. A different monopoly controls the railroad that takes the coal to market. Each monopolist chooses prices to maximize its profits. If the coal monopolist buys the railroad then it will increase its profits by raising the market price of coal.
选项：
A:对
B:错
答案: 【错】

7、判断题：
For a monopsonist, the more elastic the supply of labor, the greater the difference between the marginal cost of labor and the wage rate.
选项：
A:对
B:错
答案: 【错】

8、判断题：
If a monopolist faces a competitive labor market, it will hire labor up to the point where the price of output times the marginal product of labor equals the wage rate
选项：
A:对
B:错
答案: 【错】

9、判断题：
If a labor market is dominated by a monopolist, it is possible that the imposition of a minimum wage law could INCREASE the amount of employment in that market.
选项：
A:对
B:错
答案: 【对】

10、判断题：
If an upstream monopolist sells to a downstream monopolist, the price to consumers will be higher than the competitive price, but not so high as it would be if the downstream monopolist took control of the upstream monopolist’s business and ran both the upstream and downstream markets to maximize total profits.
选项：
A:对
B:错
答案: 【错】

第十七章 单元测试

1、判断题：
A firm in a competitive industry takes account of the fact that the demand curve it confronts has a significant negative slope.

选项：
A:对
B:错
答案: 【错】

2、判断题：
In a perfectly competitive industry, the demand curve for the total output of the industry may be downward sloping.

选项：
A:对
B:错
答案: 【对】

3、判断题：
Price equals marginal cost is a sufficient condition for profit maximization

选项：
A:对
B:错
答案: 【错】

4、判断题：
A firm produces one output, using one input, with the production function f(x) = 2x^1/3 where x is the amount of input. The cost function for this firm is proportional to the price of the input times the cube of the amount of output.

选项：
A:对
B:错
答案: 【对】

5、判断题：
A competitive firm has a continuous marginal cost curve. It finds that as output increases, its marginal cost curve first rises, then falls, then rises again. If it wants to maximize profits, the firm should never produce at a positive output where price equals marginal cost and marginal cost decreases as output increases.

选项：
A:对
B:错
答案: 【对】

6、单选题：
North Bend currently has one McDonald’s fast food franchise. Demand for hamburgers in North Bend is given by Q = 200 Q hamburgers. If a second McDonald’s franchise were to move into North Bend (and both behave as duopolists), the profit of the original McDonald’s would.
选项：
A:

fall from $10 to $ -80

B:

fall from $210 to $120.

C:

fall from $90 to $ -80

D:

fall from $10 to $ -40

答案: 【

fall from $10 to $ -40

】

7、判断题：
duopoly in which two identical firms are engaged in Bertrand competition will not distort prices from their competitive levels.
选项：
A:对
B:错
答案: 【对】

8、判断题：
A Stackelberg leader will necessarily make at least as much profit as he would if he acted as a Cournot oligopolist.
选项：
A:对
B:错
答案: 【对】

9、判断题：
In the Cournot model, each firm chooses its actions on the assumption that its rivals will react by changing their quantities in suchaway as to maximize their own profits.
选项：
A:对
B:错
答案: 【错】

10、判断题：
In the Bertrand model of duopoly, each firm sets its price, believing that the other’s price will not change. When both firms have identical production functions and produce with constant returns to scale, the Bertrand equilibrium price is equal to marginal cost.
选项：
A:对
B:错
答案: 【对】

第十八章 单元测试

1、判断题：
Monopoly always has constant elasticity demand.

选项：
A:对
B:错
答案: 【错】

2、单选题：
A game has two players. Each player has two possible strategies. One strategy is called “cooperate”, the other is called “defect”. Each player writes on a piece of paper either a C for cooperate or a D for defect. If both players write C; they both get a payoff of $100. If both players defect they each get a payoff of 0. If one player cooperates and the other player defects, the cooperating player gets a payoff of S and the defecting player gets a payoff of T . To defect will be a dominant strategy for both players if:

选项：
A:S + T > 100
B: T > 2S
C:S < 0 and T > 100.
D:S < T and T > 100.
答案: 【S < 0 and T > 100.】

3、单选题：
In the town of Torrelodones, each of the N > 2 inhabitants has $100. They are told that they can all voluntarily contribute to a fund that will be evenly divided among all residents. If $F are contributed to the fund, the local K-Mart will match the private contributions so that the total amount to be divided is $2F. That is, each resident will get back a payment of $2F/N when the fund is divided. If people in town care only about their own net incomes, in Nash equilibrium, how much will each person contribute to the fund?
选项：
A:0
B:$10
C:$20
D:$50
答案: 【0】

4、单选题：
Big Pig and Little Pig have two possible strategies, Press the Button, and Wait at the　trough. If both pigs choose Wait, both get 2. If both pigs press the button then Big Pig gets 7 and Little Pig gets 3. If Little Pig presses the button and Big Pig waits at the trough, then Big Pig gets 10 and Little Pig gets 0. Finally, if Big Pig presses the button and Little Pig waits, then Big Pig gets 6 and Little Pig gets 1. In Nash equilibrium,
选项：
A:Little Pig will get a payoff of 1 and Big Pig will get a payoff of 6.
B:Little Pig will get a payoff of 3 and Big Pig will get a payoff of 7.
C:Both pigs will wait at the trough.
D:The pigs must be using mixed strategies.
答案: 【The pigs must be using mixed strategies.】

5、单选题：
A famous Big Ten football coach had only two strategies. Run the ball to the left side
of the line. Run the ball to the right side. The defense can concentrate forces on the left side or the right side. If the opponent concentrates on the wrong side, his offense is sure to gain at least 5 yards. If the defense defended the left side and the offense ran left, it gain only 1 yard. If the opponent defended the right side when the offense ran right, the offense would still gain at least 5 yards with probability 0.70. It is the last play of the game and the famous coach’s team is on offense. If it makes 5 yards or more it wins, if not it loses. Both sides choose Nash equilibrium strategies. In equilibrium the offense:

选项：
A:is sure to run to the right side.
B:will run to the right side with probability 0.77.
C:will run to the right side with probability 0.87.
D:will run to the two sides with equal probability.
答案: 【will run to the right side with probability 0.77.】

6、判断题：
A situation where everyone is playing a dominant strategy must be a Nash equilibrium.
选项：
A:对
B:错
答案: 【对】

7、判断题：
In a Nash equilibrium, everyone must be playing a dominant strategy
选项：
A:对
B:错
答案: 【错】

8、判断题：
In the prisoners’ dilemma game, if each prisoner believed that the other prisoner would deny the crime, then both would deny the crime.
选项：
A:对
B:错
答案: 【错】

9、判断题：
A general has the two possible pure strategies, sending all of his troops by land or all of his troops by sea. An example of a mixed strategy is where he sends 1=4 of his troops by land and 3=4 of his troops by sea.
选项：
A:对
B:错
答案: 【错】

10、判断题：
In Nash equilibrium, each player is making an optimal choice for herself, given the choices of the other players
选项：
A:对
B:错
答案: 【对】

第十九章 单元测试

1、判断题：
An allocation of the endowment that improves the welfare of all consumer is a Pareto-improving allocation.

选项：
A:对
B:错
答案: 【错】

2、判断题：
In a Edgeworth box there are lot of  allocations that are Pareto-optimal.

选项：
A:对
B:错
答案: 【对】

3、判断题：
An externality is a cost or a benefit imposed upon someone by actions taken by others.

选项：
A:对
B:错
答案: 【对】

4、判断题：
An economic situation involves a production externality if one firm’s production possibility is affected by the choices of the other firms not the consumers’.

选项：
A:对
B:错
答案: 【错】

5、判断题：
Ronald Coase’s insight is that most externality problems are due to an inadequate specification of property rights.

选项：
A:对
B:错
答案: 【对】

6、判断题：
To say that preferences are single peaked means that everybody either prefers more public goods to less or everybody prefers less public goods to more.
选项：
A:对
B:错
答案: 【错】

7、判断题：
If a pure public good is provided by voluntary contributions, economic theory predicts that in general too little will be supplied.
选项：
A:对
B:错
答案: 【对】

8、判断题：
One of the problems with the Clarke tax mechanism is that when it is used, people have an incentive to lie about their preferences.
选项：
A:对
B:错
答案: 【错】

9、单选题：
A small economy has only two consumers, Ben and Penelope. Ben’s utility function is U (x; y) = x + 84y1/2 . Penelope’s utility function is U (x; y) = x + 7y. AtaPareto optimal allocation in which both individuals consume some of each good, how much y does Ben consume?
选项：
A:36
B:6.5
C:12
D:13
答案: 【36】

10、单选题：
According to the First Theorem of Welfare Economics:
选项：
A:Every competitive equilibrium is fair.
B:If the economy is in a competitive equilibrium, there is no way to make anyone better off.
C:A competitive equilibrium always exists.
D:None of the above.
答案: 【None of the above.】