領(lǐng)先經(jīng)濟(jì)學(xué)原理英文版課后練習(xí)參考答案

1、Chapter OneSome examples of microeconomics:How does the local phone company set its fee structure?Does Microsoft act like a monopoly?Some examples of macroeconomics:How would GDP be affected by the increasing unemployment rate?What is the growth rateof the Unites States trade deficit?(1) laborcapita

2、llandcapitallandOpen-ended.If the bus has empty seats, the cost of adding one more passenger is negligible. As long as the passenger pays more than the marginal cost, selling him a ticket is profitable.The opportunity cost of operating his own business should include the foregone income as a civil s

3、ervant ($25,000). Thus, although the profit calculated by the accountant is positive ($20,000), the profit adjusted for the opportunity cost of foregone income will be -$5,000 ($20,000 - $25,000).It depends on what your next best choice is. Instead of studying Economics, you could watch TV, study En

4、glish, or talk to a friend on the telephone. Suppose your next best choice is to watch TV Then the opportunity cost of studying Economics is the foregone pleasure you might obtain from watching TVOpen-ended.Chapter TwoOpen-ended.A market failure occurs when a market, left to itself, fails to allocat

5、e resources efficiently. Lack of competition, inadequate information, externalities, and public goods are examples of market failures. Generally lack of competition, inadequate information, externalities and lack of public goods are the main sources of market failure.(3)(4).Positive externality: Ins

6、tead of driving, people cycle to work. Cycling can lead to less deaths in car accidents and reduce the gases that affect global warming. Negative externality: Your neighbor is blasting his stereo and the noise is coming into your room.(1) rival, excludablenon-rival, excludablenon-rival, non-excludab

7、le(1)The subway becomes more rival during rush hours. Public good.A police station.These services would be under provided.Chapter ThreeMany factors influence the quantity demanded other than the price. If some circumstances change, the quantity demanded changes too. This assumption is helpful to iso

8、late just two variables that are being discussed price and quantity demanded.(1)Price of CDDQuantity of CDPrice of CDplayersPrice of CDQuantity of CD playersPrice of CDDQuantity of CD(1) Normal goods.Inferior goods.Inferior goods.Normal goods.The demand curve for China Mobile will shift to the left.

9、 China Telecom will experience movement down its demand curve.People would book their hotels early to guarantee they get the room. There would be a rush of early bookings. The demand curve would shift to the right.The five main factors that can shift the supply curve are changes ininput prices, 2) p

10、rices of related goods, 3) technology, 4) expectations, and 5) the number of firms in the market.(1) The supply curve will shift to the left.The demand curve will shift to the right.The demand curve will shift to the left.The supply curve will shift to the right.(1) The supply curve for taxi service

11、 will shift to the left. The new equilibrium price will go up. The new equilibrium quantity will decrease.The demand curve for taxi service will shift to the left. The new equilibrium price will go down. The new equilibrium quantity will decrease.The demand curve for taxi service will shift to the r

12、ight. The new equilibrium price will go up. The new equilibrium quantity will increase.The demand curve for taxi service will shift to the left. The new equilibrium price will go down. The new equilibrium quantity will decrease.Chapter Four(25- 24)(2.61 -2.32)Ed 0.3469(25 24)/2 (2.32 2.61)/2The dema

13、nd for gasoline was inelastic.Because the demand for wheat is inelastic, the total revenue will decreaseif the price of wheat goes down.Total revenue when the price is 50: 50 1000 = 50000.If the manager reduces the price of each ticket by 10%, the quantity of tickets being sold will increase by 20%

14、(10%x 2).The new price will be 45. The new quantity of tickets will be 1200.Total revenue after the price change: 45 1200 = 54000Change in total revenue: 54000- 50000 = 4000.Ei (4-3)/4 2.5(2000 1800)/2000(2) As incomes rise the demand for fresh fruit also rises but by a smaller proportion.(1)The dem

15、and for necessities is income inelastic, while it is elastic for luxury goods.(1)Chapter Five1.Concerts20181614121086420Meals0 1123456789102.(1) 8.1.6.The law of diminishing marginal utility holds.No. As marginal utility turns negative, total utility starts falling.The utility derived from consumpti

16、on is intangible. However, consumers reveal their preferences through purchase decisions and thereby provide tangible evidence of utility.When income increases, total utility increases as more goods can be consumed. But this doesnt mean the law of diminishing marginal utility does not hold.No. He sh

17、ould consume more yoghurt and fewer sandwiches.4 novel and 5 CDs.Chapter Six(1) Explicit cost.Implicit cost.Explicit cost.Explicit cost.(1) 40,000.80,000. The implicit cost is not taken into consideration.The economic profit is zero. The owner earns a normal profit.(1) Long-run.Short-run.Long-run.Sh

18、ort-run.(1)Fixed inputVariable inputTotal productMarginal product301003110103222123313311134140735455361483:3714803840-8Omitted.As the number of units of the variable input increases, eventually the marginal product of the variable input will decline. The law of diminishing marginal returns starts w

19、hen the third variable input is used.When marginal product curve rises, the total product increases by increasing amounts. When marginal product curve begins to fall, total product still increases but at a decreasing rate. When marginal product is negative, the total product curve begins to fall.Whe

20、n the marginal cost is below the average cost (average variable cost), the average cost (average variable cost) would be declining. When the marginal cost is above the average cost (average variable cost), the average cost (average variable cost) would be increasing. Thus, marginal cost curve must i

21、ntersect average cost and average variable cost curves at their lowest points.The firm average fixed cost is its total fixed cost divided by the quantity of output. Because the total fixed cost remains unchanged when the quantity of output increases, the average fixed cost keeps declining. So the av

22、erage fixed cost curve is not U-shaped.7. (1)OutputTFCTVCTCMCAFCAVCATC050050 1-1502575255025752503585102517.542.53504595 I10 I16.67115131.6745050100512.512.52555060110110 :10 1121226508013020 I8.3313.3321.66750115165357.1416.4323.57850165215506.25 120.62526.875950225275605.562530.56Omitted.Omitted.8

23、. Large corporate farms are more capable of obtaining new technology, using large-scale machines and financing in lower cost than small family farms.Chapter SevenAs price-takers, perfectly competitive firms can sell all they want at that price, but cannot sell anything at a higher price. Thus advert

24、ising would not increase profits at all.Agree. If marginal revenue exceeds marginal cost, it should increase output to increase profit.If a firm earns zero economic profit, it is making just enough to cover all costs. If it is shut down, the fixed cost cannot be covered.(1) The firm should continue

25、producing.The firm should continue producing.The firm should shut down.The monopoly firm is interested in maximizing profit, not price. It charges the price for which its profits are the largest.The government has granted U.S. Postal Service the license to run the first-class mail service.Because th

26、e products are differentiated, the sellers have a little control over the price of their products.The firm should increase the level of output because marginal revenue exceeds marginal cost.Oligopoly.Open-ended.Chapter EightOpen-ended.A final good is one that involves no further processing and is pu

27、rchased for final use. An intermediate good is one that involves further processing. A loaf of bread could be either a final or intermediate good, depending on the purchasers use of the bread. It is a final good when purchased by a household for consumption; it is an intermediate good when purchased

28、 by a restaurant which resells the bread.(5)(1) Nominal GDP in 2009: 320000 yuan.Nominal GDP in 2010: 450000 yuan.Real GDP in 2010: 374000 yuan.GDP deflator for 2010: 120.3.(1) Government purchases.Consumption.Net exports.Investment.These suggest that the economy is in an expansion phase of the busi

29、ness cycle.Recession and depression both means a slowdown in economic activity. Depression is an unusually severe or long recession.Chapter NineThe long-run aggregate supply curve shows the relationship between the aggregate price level and the quantity of aggregate output supplied in the long run.

30、In the long run, the level of output is determined by the amounts of economic resources and the technology available; it is independent of the price level. The long-run aggregate supply curve, therefore, is vertical.Higher taxes will cause higher production cost and have a negative effect on aggrega

31、te supply.The fall in the price level leads to more consumption, more investment, and more net exports. Therefore, the aggregate demand increases when the price level falls.Changes in consumption, investment, government purchases and net exports.(1)Open-ended.Open-ended.Chapter TenOpen-ended.The Con

32、sumer Price Index (CPI), is an indicator of changes in the prices paid by consumers. To calculate the inflation rate from CP,I the previous year s CPI is subtracted from the current year s CPI, and then divided by the previous year CPI. Finally, move the decimal over two places to the right to conve

33、rt the result to a percentage.Open-ended.(1) Wealth redistribution. (2) General inconvenience. (3) Menu cost. (4) Shoe leather cost. Note: These costs may be ranked in a different may.Tommy gains and Lucy loses.Cyclical unemployment.(1) Frictional unemployment.Seasonal unemployment.Cyclical unemploy

34、ment.Open-ended.Chapter Eleven(2)(1)Reserves are deposits that banks have received but have not loaned out. Required reserves are deposits that the central bank requires banks to hold and excess reserves are any additional reserves the banks choose to hold in excess of the required reserves.To incre

35、ase the money supply, the central bank buys government securities from the public. To reduce the money supply, the central bank sells government securities to the public.Automatic stabilizers are a form of nondiscretionary fiscal policy that automatically offsets economic fluctuations without direct

36、 intervention by the government.Examples of automatic stabilizers include the progressive tax system and unemployment compensation.Increase government purchases and transfer payments, or reduce taxes.(1) When the economy gets overheated, the government could take a contractionary fiscal policy.When

37、the economy is in a slowdown, the government could take an expansionary fiscal policy.The economy under Clinton could have boomed for other reasons, such as the increased investor and consumer confidence, leading to increases in investment and consumption spending. These could have outweighed the co

38、ntractionary effect of his fiscal policies. The surpluses came about not only from the tax increases of his discretionary policies, but also from the booming economy, which brought in increases in tax revenues as the automatic stabilizers worked.Chapter Twelve(1) I have absolute advantages in both o

39、utlining and typing.I have a comparative advantage in outlining.Frank should specialize in typing; I should specialize in outlining.(1) 8/3 computers.3/4 televisons.the U.S.computers.Open-ended.Open-ended.Steel firms in the U.S. would be happy with the new tariff. However, the exporting countries would be hit by this policy. The tariff would also hurt U.S. firms that use steel including producers of autos, appliances, heavy machinery, machine to