This essay expounds the concept of externality in the wider category and summarizes its features , starting with analysis of behavioral systems, then analyses the orientation and quantity of externality using economic methods ,on the basis of which the essay presents some fundamental trains of thought to solve the problems of externality with the economic scope and studies fundamental policy of government regulation as well as internal and external mechanism of governance typed as pollution governance and environment protection .In contrast with economic externality,the essay goes on to expound inevitability along with main features of political externality, to explore governance approaches of political corruption problems as the typical example of political externality ,and to argue the materialistic attitude towards corruption .
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