Question

经济学问题，请大神帮忙解答，谢谢！~~~要步骤

Suppose that all firms in a constant-cost industry have the following long-run cost
curve:

c(q) = 4q2 + 100q + 100
The demand in this market is given by QD = 1280 - 2p. Suppose the number of firms in
the market is restricted to 80
a. Derive the supply curve with this restriction. Find the market equilibrium price
and quantity with the restriction.
b. If firms are allowed to buy and sell these permits in an open market, what will be the
rental price of permits? Will firm’s that own permits make profit? Briefly explain.
c. How much deadweight loss is generated by the permit system? Provide a graph
showing the region of this deadweight loss.
d. Suppose the government abandons the permit system and simply imposes a fixed fee
on firms in the market. If the fee is set equal to the permit price you found in c., what
will be the equilibrium price, quantity, number of firms and deadweight loss?

Answer 1

a.80 firms, each firm will produce as long as P<ac AC可以从LRC算出来，这样得到的P和Q的方程就是每个firm的supply curve,，乘以80是market的，然后和QD联立

Answer 2

何止是经济学问题，还是翻译题！嘿嘿，看不懂

Answer 3

均衡价格是指市场上上生产者所生产的产品恰好都被消费时候所达到的价格；计算均衡价格可以生产曲线的函数等于供给曲线的函数即C（q）=D)(q)此时只剩下了一个未知数q就是算出来就是均衡价格 带入生产曲线就是均衡产量‘’‘’
我只能给你解答到这了 别的我也看不懂了