noun
positive externalities
Economics term referring to beneficial effects on third parties not involved in a transaction, such as education or vaccination benefits to society.
教育は正の外部性を持つと経済学では考えられている。
In economics, education is considered to have positive externalities.
予防接種の普及は正の外部性をもたらす。
The spread of vaccination brings about positive externalities.
Compound of 正 (positive) + の (attributive particle) + 外部性 (externality), a direct translation of the English economics term 'positive externalities'.