已知商品的需求函数Qd与供给函数Qs分别为:Qd=30-5P,Qs=20+5P,该商品的均衡数量是()。
A.资产的增加和负债的减少
B.资产和所有者权益的等额增加
C.资产和负债的等额增加
D.资产内部的一增一减
A.资产的增加和负债的减少
B.资产和所有者权益的等额增加
C.资产和负债的等额增加
D.资产内部的一增一减
第1题
已知某一时期内某商品的需求函数为Qd=50-5P,供给函数为Qs=-10+5P。
(1)求均衡价格Pe和均衡数量Qe并作出几何图形。
(2)假定供给函数不变,由于消费者收入水平提高,使需求函数变为Qd=60-5P。求出相应的均衡价格Pe和均衡数量Qe,并作出几何图形。
(3)假定需求函数不变,由于生产技术水平提高,使供给函数变为Qs=-5+5P。求出相应的均衡价格Pe和均衡数量Qe,并作出几何图形。
(4)利用(1)、(2)和(3),说明静态分析和比较静态分析的联系和区别。
(5)利用(1)、(2)和(3),说明需求变动和供给变动对均衡价格和均衡数量的影响。
第4题
A.无法确定
B.高于50
C.低于50
D.等于50
第6题
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 The amount of wheal paid is equal to the amount that could have been harvested on the land withdrawn from production.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?
第7题
假定表2一1(即教材中第54页的表2-5)是需求函数Qd=500-100P在一定价格范围内的需求表:
表2―1某商品的需求表
(1)求出价格2元和4元之间的需求的价格弧弹性。
(2)根据给出的需求函数,求P=2元时的需求的价格点弹性。
(3)根据该需求函数或需求表作出几何图形,利用几何方法求出P=2元时的需求的价格点弹性。它与(2)的结果相同吗?
第9题
A.等于20
B.小于20
C.大于20
D.小于或等于20
第11题
A.可贷资金的需求主要由投资需求,赤字需求和家庭需求三个要素构成
B.可贷资金的供给由家庭储蓄,企业储蓄和政府储蓄三个要素构成
C.利率不是由可贷资金的供求决定的
D.可贷资金的需求函数是利率的递增函数
E.可贷资金的供给函数是利率的递增函数