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SARS以其巨大的外部性——传染速度和规模给中国经济带来意想不到的影响。本文从 SARS外部性导致行为主体之间发生相互作用入手 ,研究不同行为主体面对突发事件的不同行为选择 ,在此基础上解释非典时期出现的特殊经济现象。文章最后提出改进政府反应模式的相应建议。本文的观点是 ,非典时期的特殊经济现象产生于不同行为主体的相互作用。政府作为其中的一个行为主体其政策导向出现转折的根本原因在于采用“投票理论”的反应模式。为实现经济的帕累托改进有必要改变政府反应模式、引入政府约束机制。
SARS with its huge externalities - the speed and scale of infection have an unexpected impact on the Chinese economy. This paper starts from the interaction between the actors of SARS, investigates the different behavior choices of different actors in the face of emergencies, and then explains the special economic phenomena that emerged during SARS. Finally, the article puts forward some suggestions to improve the government response mode. This article’s point of view is that during the SARS period, special economic phenomena arise from the interaction of different actors. The fundamental reason why the government is one of the main actors in its policy guidance turning point lies in adopting the response model of “voting theory.” In order to realize economic Pareto improvement, it is necessary to change the government reaction mode and introduce the government restraint mechanism.