什么是长期(Long run)?
第1题
第2题
第3题
If a firm enjoys economies of scale up to a certain output level, and cost then increases proportionately with output, what can you say about the shape of the long -run average cost curve?
第4题
一个地区有若干家商店销售某种品牌的真空吸尘器。
(1)假如所有销售商要价相同,他们的长期经济利润是否都等于零?
(2)假如所有销售商要价相同,但是一家当地销售商的商店经营场所为他自己拥有的房子,不必付租金,这个销售商的经济利润为正吗?
(3)不必付租金的这家销售商是否有激励去降低其销售价格?
A certain brand of vacuum cleaners can be purchased from several local stores as well as from several catalogue or website sources.
a If all sellers charge the same price for the vacuum cleaner, will they all earn zero economic profit in the long run?
b. If all sellers charge the same price and one local seller owns the building in which he does business, paying no rent, is this seller earning a position economic profit?
e. Does the seller who pays no rent have an incentive to lower the price he charges for the vacuum cleaner?
第5题
说明下述各项中每一对之间哪个更富有价格弹性:
(1)某一特定品牌牙膏的需求与普通牙膏的需求;
(2)短期内汽油的需求与长期内汽油的需求。
Explain which of the following items in each pair is more price elastic.
a. The demand for a specific brand of toothpaste and the demand for toothpaste in general
b. The demand for gasoline in the short run and the demand for gasoline in the long run
第6题
(1)企业目前的产量为100单位,成本最小化的劳动和资本分别为20和5。在图上用等产量线和等成本线表示出来。
(2)企业想将产量扩大为140单位,如果资本在短期固定,需要多少劳动?在图形上表示出来,并计算企业新的成本。
(3)在图形上表示出企业在长期生产140单位产品的成本最小化劳动和资本投入。
(4)如果边际技术替代率为K/L,计算生产140单位产品的最优劳动和资本投入。
Suppose that a firm' s production is q= 10L1/2K1/2. The cost of a unit of labor is $ 20 and the cost of a unit of capital is $ 80. a The firm is currently production 100 unis of output and has determined that the cost - mini-mizing quantities of labor and capital are 20 and 5, respectively. Graphically illustrate this using isoquants and isocost lines.
b,The firm now wants to increase output to 140 units. If capital is fixed in the short run, how much labor will the firm require? Illustrator this graphically and find the firms new total cost.
c. Graphically identify the cost - minimizing level of capital and labor in the long run if the firm wants to produce 140 units.
d. If the marginal rate of technical substitution is K/L, find the optimal level of capital and labor required to produce the 140 units of output.
第7题
logies may fundamentally alter out way of
A) view B) distance C) jump D) run
第8题
A.marginal cost > average cost = $16.67
B.marginal cost < average cost = $16.67
C.$16.67 = marginal cost = average cost
D.$16.67 = marginal cost > average cost
第9题
Face up to it
One great obstacle(障碍)on the road to health after a significant loss is denial. Instead of facing______【51】has happened to them, says Dr. Michael Aronoff, a spokesperson______【52】the American Psychiatric Association, many people " try to fill up that empty feeling by looking for an escape. " The man who______(53 ) touched a drink will begin taking to alcohol. A woman who watched her weight______【54】overeat.
After working for bosses all his life, John Jankowski had always______【55】to have his own firm. He finally got the start-up money and did well. ______【56】came a down-turn in business, and before long Jankowski was in serious financial trouble.
"It was like my whole______【57】had been______【58】. " he says. With financial resources used______【59】and the pressure of a family to______【60】, Jankowski's thoughts turned______【61】escape.
One morning, while on a run, he just kept going. After jogging westward for two hours, he staggered back home. "I finally realized that I couldn't______【62】away from my troubles. The only thing that made sense was to______【63】up to my situation, " he says. "______【64】failure was the toughest part—______【65】I had to before I could get on with my life. "
(51)
A.which
B.why
C.who
D.what
第10题
(1)如果公司决定将两种产品的价格都提高10%,其销售量会有什么变化?销售收入呢?
(2)你能否从已知的信息中判断,哪个产品会给厂商带来最大的收入?如果答案是肯定的,为什么?如果无法做出回答,你还需要哪些信息?
The ACME Corporation determines that at current prices the demand for its computer chips has a price elasticity of-2 in the short run, while the price elasticity for its disk drives is- 1.
a. If the corporation decides to raise the price of both products by 10 percent , what will happen to its sales? To its sales revenue?
b. Can you tell from the available information which product will generate the most revenue for the firm? If yes, why? If not, what additional information would you need?