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。
Negative externality rules are an important issue in public economics, and the economic efficiency in solving negative externalities is reflected in the costs and benefits in dealing with them.
负外部性规则是公共经济学要研究解决的重要问题，其解决的经济效率反映在外部性处理的成本与效益上。
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