ECX2953-ECX5953 Economics
ECX2953-ECX5953经济学
Homework No 1
作业 1 号
Chapter 1, Problems and Applications
第1章 问题与应用
4. You win $100 in a lottery. You have a choice between spending the money now and putting it away for a year in a bank account that pays 5 percent interest. What is the opportunity cost of spending the $100 now?
4. 您在彩票中赢得了 100 美元。你可以选择现在花掉这笔钱,或者把它放在一个支付5%利息的银行账户里一年。现在花这 100 美元的机会成本是多少?
Chapter 4, Problems and Applications
第 4 章,问题和应用
Explain each of the following statements using supply-and-demand diagrams.
使用供需图解释以下每个陈述。
When a cyclone hits Queensland, the price of bananas rises in supermarkets throughout Australia.
当飓风袭击昆士兰州时,整个澳大利亚超市的香蕉价格都会上涨。
On Tuesdays, cinemas discount tickets.
周二,电影院会打折票。
When a war breaks out in Ukraine, the price of petrol rises and the price of a used SUV falls.
当乌克兰爆发战争时,汽油价格上涨,二手 SUV 价格下跌。
The market for pizza has the following demand and supply schedules:
比萨饼市场有以下需求和供应时间表:
Price ($) | Quantity demanded | Quantity supplied |
4.00 | 135 | 26 |
5.00 | 104 | 53 |
6.00 | 81 | 81 |
7.00 | 68 | 98 |
8.00 | 53 | 110 |
9.00 | 39 | 121 |
Graph the demand and supply curves. What are the equilibrium price and quantity in this market?
绘制供需曲线。这个市场的均衡价格和数量是多少?
If the actual price in this market were above the equilibrium price, what would drive the market towards the equilibrium?
如果这个市场的实际价格高于均衡价格,那么什么会推动市场走向均衡?
If the actual price in this market were below the equilibrium price, what would drive the market towards the equilibrium?
如果这个市场的实际价格低于均衡价格,什么会推动市场走向均衡?
Suppose that the price of tickets at your local cinema is determined by market forces. Currently, the demand and supply schedules are as follows:
假设您当地电影院的门票价格是由市场力量决定的。目前,供需时间表如下:
Price ($) | Quantity demanded | Quantity supplied |
4.00 | 1000 | 600 |
8.00 | 800 | 600 |
12.00 | 600 | 600 |
16.00 | 400 | 600 |
20.00 | 200 | 600 |
Draw the demand and supply curves. What is unusual about this supply curve? Why might this be true?
绘制需求曲线和供给曲线。这条供给曲线有什么不寻常之处?为什么会这样呢?
What are the equilibrium price and quantity of tickets?
门票的均衡价格和数量是多少?
Demographers tell you that next year there will be more film-goers in the area. The additional people will have the following demand schedule:
人口统计学家告诉你,明年该地区将有更多的电影观众。额外的人员将有以下需求时间表:
Price ($) | Quantity demanded |
4.00 | 500 |
8.00 | 400 |
12.00 | 300 |
16.00 | 200 |
20.00 | 100 |
Now add the old demand schedule and the demand schedule for the new people to calculate the new demand schedule for the entire area. What will be the new equilibrium price and quantity?
现在,添加旧需求计划和新人员的需求计划,以计算整个区域的新需求计划。新的均衡价格和数量将是什么?