V2EX negative externality

Negative Externality

定义 Definition

负外部性:指某个经济活动给无关的第三方带来未被市场价格反映的成本或损害(例如污染、噪音、拥堵),导致社会总成本高于私人成本,市场可能出现“过度生产/过度消费”。

发音 Pronunciation (IPA)

/ntv kstnlti/

例句 Examples

The factory’s smoke creates a negative externality for nearby residents.
工厂的烟雾给附近居民造成了负外部性。

When drivers ignore the environmental cost of fuel, congestion and pollution become negative externalities that society must pay for through health and cleanup expenses.
当司机不把燃油带来的环境成本计入决策时,拥堵与污染就会成为负外部性,社会不得不通过医疗与治理清理等支出来承担代价。

词源 Etymology

externality 来自 external(外部的)+ 名词后缀 -ity(表示性质/状态),字面意思是“外部性”。在经济学里,它特指“对外部第三方产生影响但未通过价格机制结算的效应”。加上 negative 表示这种外部影响是“成本/损害”而非“收益”(与 positive externality 相对)。

相关词 Related Words

文学与经典著作 Literary Works

  • Arthur C. Pigou,《The Economics of Welfare》(《福利经济学》)系统讨论外部性与“庇古税”的思想来源。
  • Ronald H. Coase, “The Problem of Social Cost” 讨论外部性、产权与协商解决(科斯定理相关)。
  • Garrett Hardin, “The Tragedy of the Commons” 以公共资源过度使用呈现负外部性/社会成本的典型逻辑。
  • N. Gregory Mankiw,《Principles of Economics》(《经济学原理》)教材中常用污染等案例解释负外部性与市场失灵。
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