ch08-The Economics of the Public Sector(9)

曼昆微观经济学分册英文版 教材PPT

Other Examples of Positive Externalities

正外部性的其他例子Being vaccinated against contagious diseases protects not only you, but people who visit the salad bar or produce section after you. R&D creates knowledge others can use. Renovating your house increases neighboring property values.Thank you for not contaminating the

fruit supply!8

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