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本文利用2001—2010年CEPIIBACI数据库、细化到HS-6位产品层面的WTO关税和CAFTA协定关税数据,基于企业异质性假设的理论框架,研究了CAFTA框架下中国的协定关税和非关税政策对进口增长的二元边际的影响。结果表明,目前中国的进口主要依靠集约边际增长,中国对外关税下降和CAFTA的建设均能提高中国进口贸易流量。更进一步,CAFTA政策对中国进口集约边际的促进作用主要通过协定关税的下降实现,而对扩展边际的促进作用则更多地是通过非关税政策的实施实现的。此外,相对中国多边最惠国关税的下降,扩展边际从CAFTA协定关税的等量下降中获得了更多的增长。这些结论为调整中国进口结构提供了有力的政策依据。
Based on the CEPIIBACI database from 2001 to 2010, this paper detailed the WTO tariffs and the CAFTA tariff data at HS-6 product level. Based on the theoretical framework of the heterogeneous assumptions of enterprises, this paper studies China’s tariffs and non-tariff policies under the framework of CAFTA Implications for the Dual Margin of Import Growth. The results show that at present, China’s imports mainly depend on the intensive marginal growth. The decline of China’s foreign tariffs and the construction of CAFTA can both raise the volume of China’s import trade. Further, the role of CAFTA in promoting the import-intensive marginalization of China is mainly realized through the reduction of the tariffs agreed, while the promotion of the expansion of marginalization is realized more through the implementation of non-tariff policies. In addition, relative to the decline in MFN tariffs in China, the expansion margin has seen more growth from the equivalent reduction of CAFTA tariffs. These conclusions provide a strong policy basis for adjusting the structure of China’s imports.