在第5版中，第147页第3题，每个国家都希望圹大那些具有规模经济的行业的生产，请根据垄断竞争模型和外部经济模型来评述这一观点。

答案是这样的

3. By concentrating the production of each good with economies of scale in one country rather than spreading the production over several countries, the world economy will use the same amount of labor to produce more output. In the monopolistic competition model, such a concentration of labor benefits the host country, which can also capture some monopoly rents, while it may hurt the rest of the world which could then face higher prices on its consumption goods. In the external economies case, such monopolistic pricing behavior is less likely since imperfectly competitive markets are less likely.

这里说垄断竞争模型会使本国受益，外国价格上涨受损。 但是这样吗？垄断竞争模型中的倾销实际上是降低外国的价格来使本国受益的。

另外外部经济模型不是说明形成外部规模效应后，即使外国以后可能会成本更低，由于初始成本高，仍然由本国生产吗？为什么答案的回答不是这样的？