So the later two kinds of direct outputs and the indirect profits are the positive externalities of metro projects.

直接产出中的后两类和间接产出都属于地铁项目的正外部性。

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As economic rationale for this special treatment, policymakers often cite positive externalities generated by FDI through productivity spillovers to domestic firms.

对于给予外企这些特殊待遇的经济解释，政策制定者们常常引证说明，FDI对国内企业的生产效率外溢，可以产生正的外部效应。

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In information market, there are both information product and service surplus with negative externalities and information product and service lack with positive externalities.

在信息市场中，既存在具有负外部性的信息产品和服务生产过剩，也存在具有正外部性的信息产品和服务生产不足。

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However, sewage treatment has many positive externalities as well, things not measured in market prices.

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At one point - not included in the edited interview - he mentioned "internalising positive externalities".

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When economists discuss rationales for government intervention in introductory economics courses, police services are sometimes offered as examples of goods that produce positive externalities.

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