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1.       You have the following information about the three electricity generation plants in Cleanland.

Source                Capacity (in GW-hour)      Marginal Cost (C$/GW-hour)

1. Coal                          4.6                                                1,310

2. Gas                            2.7                                               1,860

3. Oil                             2.0                                                 1,730

 (C$=Cleanland dollars)

The demand for electricity varies depending on the season. Cleanland has two seasons: Dry and Wet. A recent estimation of the demand is as follows:

Dry:                      Q = 14.25 – 0.005 P

Wet:                         Q = 18.3 – 0.005 P

(quantities expressed in GW-h and prices in C$/GW-h)                   
You can assume that the electricity market is perfectly competitive (and that supply and demand are constant over the day).

a.       Draw a graph showing the supply-demand equilibrium for each season. What would be the price paid by consumers in each season? What would be the surplus of each plant? What would be the consumer surplus?

b.       Assume that the government imposes a tax on the oil used as an input for electricity generation. This tax raises the marginal cost of this plant by 20%. How will this measure affect the producers and consumers? How do you think that the different producers and the consumers will react to this tax?

[此贴子已经被作者于2009-4-5 15:37:35编辑过]

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关键词：微观经济学 微观经济 经济学 Electricity information 微观经济学

我只会苯办法,就是你先用油的MC试,如果Quantity超过2了你就用油气的加权平均MC试，如果超过4.7了用油气煤的加权平均MC试。

coal、gas、oil由于是完全可替代产品，由于又处于完全竞争市场，边际成本应当就是最终的市场价格，即均衡价格，所以相对最便宜的应当就是均衡价格，而根据各自的需求方程可得到各自的均衡产量
至于加税后依照同样的分析框架分析，将税加入边际成本中就可以了

zhangibt  金钱 +10  奖励下次答题不妨把结果写了，论述不太容易说清 2009-4-5 17:52:52

补充一点，上面的边际成本当然是要换算成发每单位电时的边际成本

刚好有点空，帮你写一下算了。

供给是分段的：P=1310  (0<Q<=4.6)

             P=1730-1932/Q     (4.6<Q<=6.6)

             P=1860-2790/Q      6.6<Q<=9.3

      然后需求线你自己画上去，找均衡就是了，懒得算。

      加税了也是一样，无非是几个能源使用顺序调一下，价格变一下，算法还是这样，打出来属于重复劳动，你自己写算了。

      还有，老兄你都有空打出英文来，最好顺便翻译一下，不然这里没几个人给你答题的，版主也不会把所有事都包了。

没想到回复这么快!!谢谢大家了，特别是斑竹. 第一次发贴,谢谢斑竹的意见.

还有就是想问一下1932以及2790是怎么来的，本人刚刚学微观，基础不好，还望版主海涵，并不吝赐教！谢谢

[此贴子已经被作者于2009-4-6 15:59:16编辑过]