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在需求函数为Q=100-p的市场上,垄断企业的成本函数为C(q)=20q,那么该垄断企业利润最大化的产量为()
A.30
B.40
C.50
D.60
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A.30
B.40
C.50
D.60
某商品的需求函数为Q=12000-25P,在需求数量Q为2000件时的价格弹性是()。
A.2
B.5
C.7
D.9
1983年里根执政时,推行"实物支付计划"。以小麦市场为例,考察该计划如何奏效。
(1)假设需求函数为QD=28-2P,供给函数为QS=4+4P。P是小麦的价格,单位为美元/蒲式耳,Q是产量,单位为10亿蒲式耳,试求出自由市场均衡价格和产量。
(2)假设政府向农民支付小麦,鼓励农民将部分土地退耕,使供给减少自由市场均衡量产量的25%。用于支付的小麦来源于政府储备,数量等于退耕土地的收获量。农民可在市场上自由出售这些小麦。问农民的产量为多少?政府间接供应市场多少小麦?新的市场价格是多少?农民获益多少?消费者得益还是受损?
(3)如果政府不把小麦返送给农民,小麦将积压或变质。纳税人从该计划中受益吗?该计划存在什么潜在问题?
In 1983, the Reagan Administration introduced a new agricultural program called the Payment-in-Kind Program. To see how the program worked, let' s consider the wheat market.
a. Suppose the demand function is QD=28-2P and the supply function is QS=4+4P, where P is the price of wheat in dollars per bushel and Q is the quantity in billions of bushels. Find the free-market equilibrium price and quantity.
b. Now suppose the government wants to lower the supply of wheat by 25 percent from the free-market equilibrium by paying farmers to withdraw land from production. However, the payment is made in wheat rather than in dollars- hence the name of the program. The wheal comes from the government ' s vast reserves that resulted from previous price support programs. The amount of wheal paid is equal to the amount that could have been harvested on the land withdrawn from production. Farmers. are free to sell this wheat on the market. How much is now produced by farmers? How much is indirectly supplied to the market by the government? What is the new market price? How much do the farmers gain? Do consumers gain or lose?
c. Had the government not given the wheat back to the farmers, it would have stored or destroyed i. Do taxpayers gain from the program? What potential problems does the program create?
()型保险市场是在一个保险市场上只存在少数相互竞争的保险公司。
A.完全垄断
B.垄断竞争
C.寡头垄断
D.完全竞争
垄断竞争模式的特点是()。
A.市场上大小保险公司并存
B.少数大保险公司在市场上取得垄断地位
C.大垄断公司之间、垄断公司与非垄断公司之间、非垄断公司彼此之间存在激烈竞争
D.市场处于不受任何阻碍和干扰的状态中
E.任何公司都可以自由进出市场
在一个保险市场上,只存在少数相互竞争的保险公司的保险市场模式被称为()。
A.有限竞争模式
B.垄断竞争模式
C.完全垄断模式
D.寡头垄断模式