May and Trump Alex Wong/Getty Images

美丽新世界中的脱欧

发自布鲁塞尔——在双边贸易的过程中,收益和损失会在较大和较小的经济体之间呈现不对称分布。在年景好的时候,这对英国来说也算不上是个好消息,因为它正寻求与欧盟和其他国家订立新的贸易协议,更何况如今好年景已经一去不返了。

按照经济理论推算,建立新的贸易壁垒会使双方都利益受损。但经济原则也表明,两个经济体中较大的一个可能损失较少。

以关税为例,较大经济体的较低需求会倾向于压低其进口商品的价格。而较小的经济体不太可能对其进口商品的总体需求产生足够大的影响,从而无力左右其价格。

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