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企业异质性、贸易自由化与市场扭曲
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TitleFirm Heterogeneity, Trade Liberalization and Market Distortion  
作者毛海涛 钱学锋 张洁  
AuthorMao Haitao,Qian Xuefeng and Zhang Jie  
作者单位中南财经政法大学工商管理学院 
OrganizationZhongnan University of Economics and Law 
作者Emailqrmaohaitao@163.com;xfqian@126.com; 
中文关键词企业异质性;贸易自由化;市场扭曲 
Key Wordsfirm heterogeneity; trade liberalization; market distortion 
内容提要即使没有任何政策干预,市场本身的不完全也可能导致扭曲。本文基于Behrens类型的需求结构,在企业异质性框架下,研究贸易自由化对市场扭曲程度的影响。通过比较静态分析,发现贸易自由化(市场规模扩张或者贸易成本下降)并没有减缓市场扭曲,这是因为,贸易自由化导致市场均衡和社会最优的消费者福利上升幅度相同。此外,随着一个经济体平均生产率的上升,会出现消费者福利上升和市场扭曲加剧并存的局面,原因是,市场均衡和社会最优的消费者福利都上升,但是后者上升的幅度更大,导致二者差距拉大。因此,单纯的贸易自由化政策虽然能导致消费者福利上升,但是并不能起到降低市场扭曲程度,从而降低资源误置的作用。政策含义是,产业政策和贸易政策应该协调使用;随着一个经济体平均生产率的上升,产业政策的重要性加强。进一步研究发现,中国消费者的需求结构满足Behrens类型。因此,本文得到的一般性结论同样适用于中国。 
AbstractIn the absence of any policy intervention, the market imperfection can also result in distortion. Based on the demand structure of Behrens type, this paper studies the effect of trade liberalization on market distortions under the framework of firm heterogeneity. With comparative static analysis, it was found that trade liberalization (market expansion or declining trade costs) did not slow down the market distortions, as trade liberalization led to a similar market equilibrium and social optimal consumer welfare. In addition, with the increasing of a economy’s average productivity, there will be a rise in consumer welfare and market distortions deterioration coexist, because the market equilibrium and social optimal consumer welfare are both rising, but the latter rise a greater range, resulting in widening the gap between the two. Therefore, the simple trade liberalization policy can lead to the rise of consumer welfare, but can not play to reduce the degree of market distortions and thereby the misallocation of resource. The policy implication is that industrial policy and trade policy should be used together; with the increasing of a economy’s average productivity, the importance of industrial policy is strengthened. Further research found that the Chinese consumer demand structure to meet the Behrens type. Therefore, the general conclusions obtained in this paper apply equally to China. 
文章编号WP1291 
登载时间2018-08-28 
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