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更多“As more European immigrants ar…”相关的问题
，n为市场上厂商的数量。设美国和欧洲市场上分别有3亿和5.33亿人口。a.在没有对外贸易时，美国和欧洲汽车市场上均衡的厂商数量是多少？
b.在没有对外贸易时，美国和欧洲汽车市场上均衡的价格是多少？
c.现在假设美欧之间进行自由贸易，美国市场上除了原有的3亿人口外，将增加5.33亿人口。在美国和欧洲汽车市场上将有多少汽车厂商？汽车新的均衡价格是多少？
d.美国市场上汽车的价格在b和c中为何不同？自由贸易改善了消费者的福利吗？是怎样改善的？
Suppose that fixed costs for a firm in the automobile industry (start- up costs of factories， capital equipment， and so on) are $5 billion and that variable costs are equal to $17，000 per finished automobile. Because more firms increase competition in the market， the market price falls as more firms enter an automobile market， or specifically， where n represents the number of firms in a market. Assume that the initial size of the U.S. and the European automobile markets are 300 million and 533 million people， respectively.
a.Calculate the equilibrium number of firms in the U.S. and European automobile markets without trade.
b.What is the equilibrium price of automobiles in the United States and Europe if the automobile industry is closed to foreign trade？
c.Now suppose that the United States decides on free trade in automobiles with Europe. The trade agreement with the Europeans adds 533 million consumers to the automobile market， in addition to the 300 million in the United States. How many automobile firms will there be in the United States and in Europe combined？ What will be the new equilibrium price of automobiles？
d.Why are prices in the United States different in (c) than in (b) ？ Are consumers better off with free trade？ In what ways？
(1) Life can be tough for immigrants in America. As a Romanian bank clerk in Atlanta puts it, to find a good job “you have to be like a wolf in the forest – able to smell out the best meat.” And if you can’t find work, don’t expect the taxpayer to bail you out. Unlike in some European countries, it is extremely hard for an able-bodied immigrant to live off the state. A law passed in 1996 explicitly bars most immigrants, even those with legal status, from receiving almost any federal benefits. (2) That is one reason why America absorbs immigrants better than any other rich countries, according to a new study by the University of California. The researchers sought to measure the effect of immigration on the native-born in 20 rich countries, taking into account differences in skills between immigrants and natives, imperfect labor markets and the size of the welfare state in each country. (3) Their results offer ammunition for fans of more open borders. In 19 out of 20 countries, the authors calculated that shutting the doors entirely to foreign workers would make the native-born worse off. Never mind what it would do to the immigrants themselves, who benefit far more than anyone else from being allowed to cross borders to find work. (4) The study also suggests that most countries could handle more immigration than they currently allow. In America, a one-percentage point increase in the proportion of immigrants in the population made the native-born 0.05% better off. The opposite was true in some countries with generous or ill-designed welfare states, however. A one-point rise in immigration made the native-born slightly worse off in Austria, Belgium, Germany, Luxembourg, the Netherlands, Sweden and Switzerland. In Belgium, immigrants who lose jobs can receive almost two-thirds of their most recent wage in state benefits, which must make the hunt for a new job less urgent. (5) None of these effects was large, but the study undermines the claim that immigrants steal jobs from native or drag down their wages. Many immigrants take jobs that Americans do not want, the study finds. This “smooths” the labor market and ultimately creates more jobs for locals. Native-owned grocery stores do better business because there are immigrants to pick the fruit they sell. Indian computer scientists help American software firms expand. A previous study found that because immigrants typically earn less than locals with similar skills, they boost corporate profits, prompting companies to grow and hire more locals. 1. Increase in immigration in Austria fails to improve locals’ life mainly because of ________.
A、low wages for locals
B、imperfect labor markets
C、the design of the welfare system
D、inadequate skills of immigrants
Ⅰ度松动牙是指
A.出现垂直向松动
B.略大于生理动度，但幅度在Imm以内
C.从正常位置向任何方向摇动，松动度大于2mm
D.从正常位置向任何方向摇动，松动度在1～2mm
E.从正常位置向任何方向摇动，松动度大干3mm
女童，8岁，前牙外伤1周后就诊。右上中切牙冠折2/3，近中达龈下Imm，露髓处探诊不疼痛，叩诊()，出血暗红，Ⅰ度松动。X线片未见根折，根发育8期。处理方法选择
A.氢氧化钙活髓切断术
B.甲醛甲酚活髓切断术
C.根尖诱导成形术
D.根管治疗术
E.拔除
Ⅲ度松动牙的判定标准是，动度
A．大于Imm，有唇（颊）舌向动度
B．小于2mm，有唇（颊）舌向，近远中向动度
C．大于2mm，有唇（颊）舌向，近远中向动度
D．大于2mm，有唇（颊）舌向，近远中向，垂直向动度
E．以上都不对
A、Asian countries
B、Asian and Hispanic countries
C、Eastern European countries
D、former Soviet republics
A.studies of friendship involve more complex factors
B.studies of friendship imply that there are more complex factors
C.studies of friendship show that there are some more complex factors
D.studies of friendship are very complicated
A.with
B. on
C. of
D. in
