1 P A 1 0 0 Q A 2
2 C Q 3
2019/3/17 Public Finance
P E 2 0 0 Q E
举例:私人品
If the good was a private good, then the aggregate demand curve is:
Q Q A Q E ( 2 0 0 22 P A ) ( 0 0 P E )
Chapter 4
公共支出分析
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Public Finance
公共品的定义
纯公共品 两个特征
Nonrival 非竞争性 – 增加一个消费者所增加的 成本为0 Nonexcludable 非排他性– 难以阻止其他人消 费该产品
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Public Finance
公共品和私人品的例子
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Public Finance
私人品提供效率
推导总需求曲线 Each person’s demand curve represents the willingness-to-pay for an additional unit of a good Private good: holding P constant, add together individual quantities to get Q 水平加总
With a private good, everyone pays the same price.
P PP A E Q 4 0 0 3 P
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Public Finance
准公共品