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。
Abstract: the real estate price elasticity and gradient mechanism are the major components of the real estate price mechanism.
[摘要]房地产价格弹性机制与房地产梯度机制是房地产价格机制的主要组成部分。
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