作者Tesngray (Tesngray)
看板Economics
标题[讨论] 独占市场开放与完全竞争市场贸易?
时间Thu Feb 7 15:28:53 2013
政大题目如下:
Suppose in a country, there is one firm in an industry. suppose also
there is infinite number of firms producing the same good in the rest
of world. What is the possible impact on welfare when the country
opening up to trade?
(a) There will be no deadweight loss in the country
(b) The deadweight loss still exists but smaller under trade.
(c) the deadweight loss is larger under trade.
(d) the producer surplus is larger under trade.
思考之後我选择(A) ,因为开放贸易,厂商就会面临到完全竞争市场的成本优势
而把价格调整成P=MC.
不过有同学反应说是(B)
说独占市场不会完全变成完全竞争市场。
有大大可以帮忙解惑吗? 感谢
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1F:推 Dukoff:独占本身有的优势,不一定外商进来就可以马上让国内完全竞 02/07 16:00
2F:→ Dukoff:争。且外商一进来,看到原本消费者可接受高定价,应不会立 02/07 16:01
3F:→ Dukoff:刻让自己用完全竞争的定价方式 02/07 16:01
4F:推 moondark92:infinite number...少数厂商进来可能不会,但无限厂商.. 02/08 18:26
5F:推 h6218790831:一般会说没有交易成本、运费等等问题,也不考虑情感因 02/11 17:45
6F:→ h6218790831:素,一楼指的优势是这个吧?? 02/11 17:45
7F:→ h6218790831:除非要考虑到纯粹性竞争,才不能选(A) 02/11 17:46
8F:推 mystage:考试要选A 因为假设就是理想状态,现实中没有所谓理想状态 02/17 10:45