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传统的贸易理论下,贸易增长的动力来自于要素禀赋的比较优势,而随着贸易的向前发展,产业内贸易已越来越重要,因此就产生了新的贸易理论来解释当今的贸易现象。产品差异化理论是产业内贸易理论的重要方面。产品的水平差异,技术差异,垂直差异是贸易产生的主要原因,经典的贸易模型就用不同的方法解释了差别化产品的贸易是如何产生和带来社会福利的提高的。而产品差异价格模型则是讲述了差异的大小与产品价格和利润的关系,使企业摆脱价格困境,提高出口竞争力。所以,产品差异化理论对于我国贸易政策的制定有着不可忽视的借鉴作用。
Under traditional trade theory, the driving force of trade growth comes from the comparative advantage of factor endowments. With the development of trade, intra-industry trade has become more and more important. Therefore, a new trade theory has been created to explain the current phenomenon of trade . Product differentiation theory is an important aspect of intra-industry trade theory. The differences of products, technical differences and vertical differences are the main causes of trade. The classic trade model explains in different ways how the trade of differentiated products is generated and social welfare is brought up. The product difference price model tells the difference between the size and product price and profit, so that enterprises out of price dilemma and improve export competitiveness. Therefore, product differentiation theory for our country’s trade policy has a reference can not be ignored.