自Flam和Helpman将质量差异引入南北贸易模型之后,贸易质量越来越受到学者们的关注。开始贸易质量只是作为模型中的要素之一,用于研究发达国家和发展中国家的贸易模式。随后,学者们利用各种方法广泛研究各国的贸易质量水平位于何种地位,重点研究贸易质量的影响因素,以质量阶梯模型研究贸易质量与经济增长之间的关系。 Since Flam and Helpman introduced the differences in quality into the North-South trade model, trade quality has drawn more and more attention from scholars. To begin the trade quality is just one of the elements of the model used to study the trade patterns of developed and developing countries. Subsequently, the scholars used various methods to extensively study the status of trade quality in various countries, focusing on the influencing factors of trade quality and using the quality ladder model to study the relationship between trade quality and economic growth.