According to the economic externality theory in public economy, the economic externality in network media falls into two sides: positive externality and negative externality.
按照公共经济学的经济外部性理论，网络媒体的外部性问题分为正外部性和负外部性两个方面。
According to the economic externality theory in public economy, the economic externality in network media falls into two sides: positive externality and negative externality.
按照公共经济学的经济外部性理论，网络媒体的外部性问题分为正外部性和负外部性两个方面。
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