引力模型作为解释双边贸易流向和流量问题的有力的分析工具，已经在国际贸易实证研究中获得了相当的成功。

Gravity model is a good tool to explain the direction and flow of bilateral trade, and has gained success on the empirical research in international trade.

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本文在借鉴前沿理论的基础上，试图将投入产出表的更新技术——双边比较算法转为结构变化的分析工具。

In this paper, we apply the biproportional approaches method to decompose the changes in Input-Output Structural into column-specific, row-specific, and cell-specific changes.

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