在习题1的基础上加入外国,其需求曲线为: D*= 80-20P,供给曲线为: S* =40+20P。
a.推导并绘出外国的出口供给曲线,同时计算没有贸易时外国的小麦价格。
b.如果本国和外国进行贸易,且运输成本为零。计算自由贸易时的均衡点,与之对应的世界价格是多少?贸易量又是多大?
Now add Foreign, which has a demand curve
D*=80-20P
and a supply curve
S*=40+20P
a. Derive and graph Foreign's export supply curve and find the price of wheat that would prevail in Foreign in the absence of trade.
b. Now allow Foreign and Home to trade with each other, at zero transportation cost. Find the equilibrium under free trade. What is the world price? What is the volume of trade?
此题为判断题(对,错)。
序数效用理论中关于消费者偏好的基本假定是()
A.完备性 B.可传递性 C. 消费者无法知道效用的数值
D.效用是一种心理感觉 E. 消费者总是偏好于多的而不是偏好于少的
(1)推导商品X的市场需求函数和市场供给函数;
(2)在同一坐标系中,给出商品X的市场需求曲线和市场供给曲线,并表示出均衡点;
(3)求均衡价格和均衡产量;
(4)假设每个消费者的收入有了增加,其个人需求曲线向右移动了2个单位,求收入变化后的市场需求函数及均衡价格和均衡产量,并在坐标图上予以表示;
(5)假设每个生产者的技术水平有了很大提高,其个人供给曲线向右移动了40个单位,求技术变化后的市场供给函数及均衡价格和均衡产量,并在坐标图上予以表示。
A.等效前后磁势平衡不变化
B.把转动的转子看作不动的转子,然后进行其它参数的折算
C.等效前后转子电势不能变
D.不管进行什么样的折算,能量平衡不能变
2007年,美国人消费了192亿包香烟。他们支付的平均零售价格为4.5美元/包。
(1)给定供给弹性为0.5,需求弹性为-0.4,推导香烟的线性需求与供给曲线。
(2)香烟税是联邦税种,2007年大约为每包40美分,该税收对市场出清价格和产量产生了什么影响?
(3)消费者将支付多少香烟税?生产者呢?
In 2007,Americans smoked 19. 2 billion packs of cigarettes. They paid an average retail price of $ 4.50 per pack.
a. Given that the elasticity of supply is 0. 5 and the elasticity of demand is -0. 4 , derive linear demand and supply curves for cigarettes.
b. Cigarettes are subject to a federal tax, which was about 40 cents per pack in 2007. What does this tax do to the market - clearing price and quantity?
c. How much of the federal tax will consumers pay? What part will producers pay?