“新新贸易理论”为研究贸易的集约边际和扩展边际提供了理论基础,使其成为研究贸易增长方式的新维度。文章运用2001-2011年中国与30个主要国家(地区)的HS-6位数细分产品贸易数据,在对中国出口增长二元边际进行特征性事实描述的基础上,通过细分贸易成本的各种构成要素,探讨了中国对外贸易成本各组成部分对中国出口增长二元边际的作用机制。结果表明:中国的出口增长仍然主要归功于集约边际的拉动作用,与扩展边际相比,集约边际更具有“绝对主导、小幅震荡、稳步增加”的特征;不同贸易成本构成因素对二元边际的影响不同。总体上看,“距离在消亡”的同时,与一国实体经济相关的成本因素对集约边际的影响更大,而扩展边际则更多地受到外部冲击以及文化、法律等软环境因素的影响。 “New and New Trade Theory ” provides the theoretical basis for studying the intensive and expanding margins of trade, making it a new dimension for studying trade growth. Using the trade data of HS-6 digits breakdown products between China and 30 major countries and regions from 2001 to 2011, based on the characteristic facts of the dual marginal growth of China’s export growth, Various components and explores the mechanism of the components of China’s foreign trade costs on the dual marginal growth of China’s export growth. The results show that China’s export growth is still mainly attributed to the stimulating effect of the intensive marginalization. Compared with the expansionary marginalization, the intensive marginalization has the characteristic of “absolute dominance, slight concussion and steady increase”; the factors of different trade costs are more significant than the binary Different marginal effects. Overall, while the “distance is extinct”, the cost factors associated with a country’s real economy have a greater impact on the intensive margin, while the expanded margin is more influenced by external shocks and other soft environmental factors such as culture and law .