第4题
第5题
一家竞争性厂商的短期成本函数如下:
C(q)=q3-8q3+30q+5
(1)求出MC、AC和AVC,并在图形上表示出来。
(2)当价格位于哪一区间时厂商产量为零?
(3)在图上标出厂商的供给曲线。
(4)当价格为多少时企业产量为6?
A competitive firm has the fallowing short - run cost function: C(q)=q3-8q2+30q+5.
a. Find MC, AC, and AVC and sketch them on a graph.
b. Al what range of prices will the firm supply zero output?
e. Identify the firm's supply curve on your graph.
d. At what price would the firm supply exactly 6 units of output?
第6题
第10题
假设某一特殊行业的信息如下:
QD=6500-100P市场需求
QS=1200P市场供给
C(q)=722+q2/200厂商总成本
MC(q)=2q/200
厂商边际成本
假定所有厂商完全同质,而且市场是完全竞争的。
(1)计算均衡价格、均衡产量、厂商供给产量和每家厂商的利润。
(2)在长期将有厂商进入还是退出市场?试解释。进入或退出将会对市场产生何种影响?
(3)在长期,每家企业销售其产品的最低价格为多少?利润是正的、负的还是为零?解释你的结论。
(4)在短期,每家企业销售其产品的最低价格为多少?利润是正的、负的还是为零?解释你的结论。
Suppose you are give the following information about a particular industry:
QD=6500-100P Market demand
QS=1200P Market supply
C(q)=722+q2/200 Firm total cost function
MC(q)=2q/200 Firm marginal cost function
Assume that all firms are identical and that the market is characterized by pure competition.
a. Find the equilibrium price, the equilibrium quantity, the output supplied by the firm, and the profit of each firm.
b. Would you expect to see entry into or exit from the industry in the long run? Explain. What effect will entry or exit have on market equilibrium?
e. What is the lowest price at which each firm would sell its output in the long run? Is profit positive, negative, or zero at this price? Explain.
d. What is the lowest price at which each firm would sell its output in the short run? Is profit positive, negative, or zero at this price? Explain.
第11题
请把下列表格填满,并回答后面的问题:
产量(Q) | 总收入(TR) | 总成本(TC) | 利润(π) | 边际收入(MR) | 边际成本(MC) |
0 | 0 | 0 | |||
1 | 200 | 10 | |||
2 | 380 | 30 | |||
3 | 540 | 60 | |||
4 | 680 | 100 | |||
5 | 800 | 150 | |||
6 | 900 | 210 | |||
7 | 970 | 280 | |||
8 | 1040 | 360 | |||
9 | 1080 | 450 | |||
10 | 1100 | 550 |
(1)利润最大时的产量是多少?
(2)在这一产量水平上,边际收入和边际成本之间存在什么关系?
(3)请解释为什么当边际收入和边际成本存在这种关系时的产量能使利润最大。