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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According to the characteristics of price elasticity of demand of prots this paper analyses the reason why port tariff remains relatively stable.

根据港口企业需求的价格弹性特点，分析了港口费率相对稳定的原因。

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Studying on tariff equilibriun, this paper derives the relation between the tariff set byeach country at a Nash equilibrium of tariff game and the elasticity, of demand for its export.

通过对关税均衡的探讨，导出了当关税对策处于雷希增衡时各国制定的关税与其出口需求弹性之间的关系。

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The tariff on paper products announced by the administration Friday is a significant first step in reducing that deficit.

FORBES: China Trade Sanctions

This move, according to Ann Robinson, of price comparison website Uswitch, is leading to a narrowing of the gap between the annual cost to those paying when they receive a paper bill and those on an online tariff.

BBC: Gas and electricity bills hide internet savings

British Gas said that the cheapest tariff was not necessarily the best option for every customer, such as those who would like to have paper bills and advice over the phone.

BBC: Cheapest gas and electricity deals 'ignored'