如果结果不匹配，请 
更多“()短期或长期都不能使企业获得最佳利润”相关的问题
A.垄断竞争市场上每个企业都是价格制定者
B.垄断竞争市场上产品不具差异
C.垄断竞争厂商的需求曲线弹性小于完全竞争厂商的需求曲线
D.垄断竞争厂商短期可能获得正经济利润也可能获得负经济利润
E.垄断竞争厂商长期的经济利润为零
A.在长期均衡实现时，相较之前，企业的利润没有发生变化
B.总需求减少的瞬间，从长期和短期两个角度看，都出现产品过剩，供过于求
C.在长期均衡实现时，相较之前，工人的福利水平有所降低
D.恢复长期均衡一定会经过短期均衡恢复的过程
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.
