Part Two analyzes net Banks services from economic perspective, mainly involving the externalities of net Banks services, scale economy of net bank services and the pricing of net Banks services.

第二部分，从经济学的角度，对网络银行服务进行分析，主要涉及网络银行服务的外部性，网络银行服务的规模经济，最后重点论述了网络银行服务的定价问题。

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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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Externalities of the economic law have common sense with influence of the economic law in which enacting and enforcing the economic law brings unexpected costs or benefits to the third.

经济法的外部性与经济法的影响有共通之处，是指经济法的制定与实施活动对与此活动无关的第三人利益的影响。

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But free markets are inadequate or fail altogether in the allocation of public goods, in addressing systemic and catastrophic risks and economic externalities.

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But free markets are inadequate or fail altogether in allocating public goods efficiently and effectively, in addressing systemic and catastrophic risks, and in dealing with economic externalities.

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If the full economic benefits, externalities included, of energy independence are also taken into the equation, then we could well see CO2 go from a despised and destructive waste product to a valuable commodity.

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