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基于联合国COMTRADE数据库提供的HS1996的数据,计算了2001～2005年中国农产品的对称显示性比较优势(RSCA)指数。运用统计描述、核函数密度估计、散点分布与线性回归、马尔可夫转换矩阵与流动指数和洛伦茨曲线等技术手段,对中国农产品的RSCA部门分布及其演变,以及部门内分布的跨时期变化进行分析。结果表明,中国绝大多数农产品不具有比较优势,中国农业的比较优势没有发生大的变化,农业贸易模式具有较大的稳定性,但是出现了一些值得令人关注的变化。
Based on the data of HS1996 provided by the UN COMTRADE database, the index of comparative advantage (RSCA) of agricultural products in China from 2001 to 2005 was calculated. Using the statistical description, kernel function density estimation, scatter distribution and linear regression, Markov transformation matrix and flow index and Lorentz curve and other technical means, this paper analyzes the distribution and evolution of China’s agricultural products RSCA sector, as well as cross-sectoral distribution Period changes for analysis. The results show that most agricultural products in China do not have the comparative advantage, the comparative advantages of China’s agriculture have not undergone major changes, and the agricultural trade model has great stability, but some changes of noteworthy concern have emerged.