We develop an index that measures the overall trade effects of domestic support payments. Our index is based on the Mercantilist Trade Restrictiveness Index (MTRI) and is capable of analysing the development of the trade restrictiveness of domestic support payments over time and across countries. It facilitates the evaluation of agricultural policy reforms introducing changes in the composition of domestic support payments. We conduct this analysis with a computable general equilibrium model that is extended to depict detailed agricultural policies using the Common Agricultural Policy of the European Union (EU) as an example. For the representation of agricultural policies, we updated the underlying database by incorporating detailed EU domestic support payments taken from the OECD Producer Support Estimate (PSE) tables and reconcile PSE data with the WTO classification scheme. Our index confirms a decrease in trade distortion stemming from the implementation of decoupled support in the EU. In addition, the trade‐equivalent protection rate shows that the trade restrictiveness of domestic support payments depends on the assumptions made with regard to the degree of decoupling of those payments.

中文翻译：

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以欧盟共同农业政策为例来衡量国内支持的贸易限制

我们建立了一个衡量国内支持付款总体贸易影响的指数。我们的指数基于重商主义贸易限制指数（MTRI），能够分析一段时间内以及不同国家/地区对国内支持付款的贸易限制发展情况。它促进了对农业政策改革的评估，从而改变了国内支持付款的构成。我们使用可计算的一般均衡模型进行此分析，该模型可扩展为使用欧盟（EU）的共同农业政策来描述详细的农业政策。为了代表农业政策，我们通过合并从OECD生产者支持估算（PSE）表中提取的详细欧盟内部支持付款，并将PSE数据与WTO分类方案进行对帐，从而更新了基础数据库。我们的指数证实，由于欧盟实施了脱钩支持，贸易失真有所减少。此外，按贸易当量计算的保护率表明，国内抚养费的贸易限制取决于对这些抚恤金的脱钩程度所作的假设。