NO.PZ2016010802000074
问题如下:
If companies earn economic profits in a perfectly competitive market, over the long run the supply curve will most likely:
选项:
A. shift to the left.
B. shift to the right.
C. remain unchanged.
解释:
B is correct.
The economic profit will attract new entrants to the market and encourage existing companies to expand capacity.
考点:完全竞争市场
解析:由于存在不菲的利润,所以这些利润会吸引外部的厂商进入该市场分一杯羹,同时原有厂商也会进一步扩大生产,两者都会导致行业供给增加,供给曲线向右平移。
mc高于avc的那一段 是这里说的supply surve吗