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109The following appeared in a letter to the editor of the Maple City newspaper.
"Twenty years ago Pine City established strict laws designed to limit the number of new buildings that could be constructed in the city. Since that time the average housing prices in Pine City have increased considerably. Chestnut City, which is about the same size as Pine City, has over the past twenty years experienced an increase in average housing prices similar to Pine City, but Chestnut City never established any laws that limit new building construction. So it is clear that laws limiting new construction have no effect on average housing prices. So if Maple City were to establish strict laws that limit new building construction, these laws will have no effect on average housing prices."
黑线这个恐怖的argument……
一眼望上去我只看到三个城市,有两个地域analogy,一个时间analogy……太难写了吧……
还有两天就考了……望天……
黑线,还是拜托大人看看偶的烂文吧……
原argument
论点:MC实施限制也没关系,限制盖楼与房价无关
论据:1。PC和CC size类似, 而且经历涨价时间类似(20年)--》暗示PC和CC有可比性--》PC限制,CC不限制,两者都涨价--》房间和限制盖楼无关
2。MC实施限制,房价也没啥关系。潜台词是MC和PC、CC有可比性,20年前的事情现在也一样。
俺的攻击思路:
1。PC和CC之间没有足够的相似之处,从而限制与房间无关的结论不可信。
(1)eg geographic character, history, population, average incoming, developing rate, public concern. ect.
(2) 就算承认了这些都差不多,那么比较的20年间是否这些都保持一致?是否20年来两者之间唯一的差别就是限制与否。
(3)对比的结果,是否房价增长类似?比如说涨幅,波动周期。即在控制类比的条件下,表现相同,则唯一的变量(限制法令)为无关变量。
2。即使确实限制在PC和CC两地对房价无影响,不等于对于MC也无影响。
(1)MC是否和PC有足够的相似之处?地点类比
(2)20年前无关,是否现在也无关?时间类比
黑线,我怎么看都只有两段了啦~~
虽然老是觉得那个average看着不舒服,但是不能找出明显的错误。
The editor of the Maple City (MC) suggests that legislation on building-construction restriction in MC would not affect the average housing prices; however, this argument suffers from several deconstructive fallacies--faulty analogy on location and time at least.
First of all, the editor hinted that Pine City (PC) and Chestnut City (CC) have sufficient similarities for the comparison citing the facts that these two cites have almost the same size. Yet the editor fails to exam and eliminate other possible factors, which can effect average price, for instance, geographic characters, population, developing rate, average price, public concern, tradition and so on. If any of these factors mentioned above are not comparable between the tow cities, the conclusion drawn from the analogy are highly doubtable, since even one of these factor's effect on price may hide the influence of the law.
Moreover, granting that PC and CC had sufficient similarities 20 years ago, there might be fundamental distinctions between them as time elapses. It's entirely possible that people in CC are more willingly to buy house than PC, and this tendency accelerates year after year. This tendency turns into actual housing buying action and causes the house price’s increasing. At mean time, restriction on new housing construction promotes the price in PC. In this scenario, housing price in PC and CC seem to have no relationship with the law, nevertheless it’s not the case in fact.
Besides, Admitting that all the factors remains unchanged over years and bear decisive similarities, the wave curve of housing price in both cities should be statistically similar, as the law is an irrelevant factor--in other word, all the things matters are same, the results of price should be same too, or show certain comparability at least. However, the editor provides no evidence of such comparability’s existence. Hence, it’s too presumptuous to deduce the conclusion that the law does not influence housing price.
Further more, even if the irrelevance between restriction and housing price is proved in PC, the irrelevance may not exist in AC. In common sense, no new building will leads to lacking of room, and make housing more “valuable”—that’s price rising. As an illustrate, both city of PC and CC might experience population dropping, which guarantee room abundance, and make the law lost its significance in price deciding. In other term, the law does not have effect on housing pricing only in PC and CC; therefore, the editor’s assertion is unwarranted at most, let alone the differences between now and two decades ago.
To recapitulate, the conclusion is unconvincing as it stands. To bolster it, the editor should prove similarities among PC, CC and AC from 20 years ago to future, and rule out other possibilities that may mask the relationship between restriction law and housing price. Otherwise, I will suspend my judgment on this argument as premature at most.
Word:479 time:很久很久……快两个小时……真难写啊!
[ 本帖最后由 红药 于 2007-3-5 08:19 编辑 ] |
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