作者kirin333 (双星)
看板Economics
标题[请益] 关於成本递减产业
时间Mon Jul 30 14:37:13 2012
Suppose the calculator industry is a competitive indusrty
of decreasing cost with negative slope demand curve.
A tax of $100 per calculator will, in the long run,
(a) increacing the price of a calculator by $100.
(b) increacing the price of a calculator by less than $100.
(c) increacing the price of a calculator by more than $100.
讲义中此题答案是C
我的想法是这样
decreasing cost of industry 的供给曲线(S)为负斜率
徵从量税 => S上移(LAC、LMC上移) => 价格上升、厂商产量增加
=>在长期个别厂商有利润 =>厂商家数增加(产业扩大)
此时由於厂商为decreasing cost of industry,产业扩大 成本减少
是否LAC& LMC&S 会往下移?
这样的话 最後价格不就不一定会增加超过$100
如果LAC LMC下降很多的话 price是不是会less than $100?
我就卡在这边 不知道decreasing cost of industry在这边的影响该怎麽解释
再请教各位了
感恩感恩....
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 163.13.97.14