trade matrix

The mathematical expression of the model contains the following modules: output and trade market module, price module economic main module, the system constraint module. Fourthly, this article gave a brief introduction of the Social Accounting Matrix ( SAM).

该模型的数学表达式分为以下几个模块：产出和贸易市场模块、价格模块、经济主体模块、系统约束模块。第四，本文对社会核算矩阵（SAM）做了简单介绍。

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