一道关于“公共牧场”的CR向各位过路神仙求解！！

scmsdna · 发表于 2011-6-28 19:19:14

Hardinarguedthatgrazing land held in common (that is, open to any user) would always be used less carefully than private grazing land. Each rancher would be tempted to overuse common land because the benefits would accrue to the individual, while the costs of reduced land quality that results from overuse would be spread among all users. But a study comparing 217 million acres of common grazing land with 433 million acres of private grazing land showed that the common land was in better condition.
Which of the following ,if true and known by the ranchers,would best help explain the result of the study?
a) with private grazing land,both the costs and the benefits of overuse fall to the individual user.
b) The cost in reduced land quality that is attributable to any individual user is less easily measured with common land than it is with private land
c) An individual who overuses common grazing land might be able to achieve highter returns than other users can,with the result that he or she would obtain a competitive advantage.
d) If one user of common land overuses it even slightly ,the other users are likely to do so even more,with the consequence that the costs to each user outweight the benefits
e) There are more acres of grazing land hel privately than there are held in common.

答案：D

实在不大清楚D的推理过程，求解啊~~~

多谢多谢！！

sdcar2010 · 发表于 2011-6-28 20:05:41

If D is right, then every user of common land knows that to overuse the common grazing land would in loss in his or her part. Thus, they would reason that it is in their benefit NOT to overuse the grazing land in common.

scmsdna · 发表于 2011-6-29 11:01:17

, thanks a lot!

一道关于“公共牧场”的CR向各位过路神仙求解！！

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