中国与金砖国家间农产品贸易成本弹性测度与分析

本文在Novy(2013)超越对数引力模型基础上把国内民主化程度作为政治因素从出口国和进口国两条路径引入该模型对其进行改进，并利用改进后的模型对中国与金砖国家部分农产品贸易成本弹性分别进行测度。结果显示中国与金砖国家农产品贸易成本弹性均为正，中国与金砖国家通过降低贸易成本均可提高贸易量。然而中国出口与进口贸易成本弹性差值均为负，中国总体不具有相对优势。从细分产品结构来看，中国可以优先考虑本国优势产品，重点在优势产品领域积极推进贸易自由化和便利化。中国与金砖国家存在产业内贸易潜力较大产品，中国可以与金砖国家在不同层次加深农业分工与合作，分散中国农产品贸易风险，实现对外贸易多元化和可持续发展。

Measuring and Analyzing the Agricultural Trade Cost Elasticity between China and BRICS: Revised Translog Gravity

In this paper, translog gravity is revised and the domestic democratization as political factor is introduced into it from two paths of export and import. Based on the revised model the paper measures the agricultural trade cost elasticity in 28 kinds between China and BRICS. The result shows all the elasticity is positive, which means reducing trade cost could increase the volume of trade for the BRICS. However, the difference value between export and import cost elasticity is negative, which implies China does not have a comparative advantage in general. As for the product structure, the superior products should be given priority to promote trade liberalization and facilitation. It exits potential products in intra-industry trade between China and the BRICS. China could deepen division of labor and cooperation with BIRCS to reduce trade risk and realize diversification in sustainable development.