This paper analyzes the substituting effect of forest certification against tariff barriers using a space-price gradient model, and gives Suggestions.
本文利用空间价格梯度场模型分析了森林认证对关税壁垒的替代效应，并在最后提出了相关建议。
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The Ministry of Commerce announced that the China-Peru Free Trade Agreement took effect Monday. More than 90% of goods would be tariff free in several phases.