在 經濟學 中， 外部性 （英語：externality）或 外部成本 （英語：external cost）、 外部效应 、 溢出效应，是作為另一方（或多方）活動的影響而產生的未參與第三方的間接 成本 或 收益。

Aug 10, 2025 · What Is an Externality? An externality occurs when an activity by one party causes a cost or benefit to another party. These effects can be either negative or positive.

三者共同构建了外部性研究的理论基础。 [1-2] 中文名 外部性 外文名 Externality 定 义 一个人或一群人的行动和决策使另一个人或一群人受损或受益的情况 别 称 溢出效应、外部影响、外差效 …

在经济学中，外部性（Externality）指的是经济主体（包括生产者或消费者）的经济活动对他人和社会造成的非市场化的影响。

An externality, in economic terms, is a side effect or consequence of an activity that is not reflected in the cost of that activity, and not primarily borne by those directly involved in said …

The meaning of EXTERNALITY is the quality or state of being external or externalized. How to use externality in a sentence.

The concept of externality was first developed by Alfred Marshall in the 1890s [1] and achieved broader attention in the works of economist Arthur Pigou in the 1920s. [2] The prototypical …

Other articles where externality is discussed: market failure: Externalities: When goods are produced, they may create consequences that no one pays for. Such unaccounted-for …

EXTERNALITY definition: 1. a positive or negative effect for someone else as a result of something that you do: 2. the…. Learn more.

2 days ago · What Is an Externality? An externality is a cost or benefit that is caused by one party but financially incurred or received by another. Externalities can be negative or positive. A …