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【经济增长质量】多产品公司与产品质量


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摘要:本文发现质量差异化是多产品公司的一个重要特征。多产品公司不同产品间的质量差异是通过不投入品的不同质量来实现的。公司的核心竞争力体现在带来更多销量的高质量产品种类上,虽然这些产品价格更贵些。我们的结论依赖于中国海关数据的四个典型事实。第一,公司从价格更贵的产品中获得更多的双边和全球收入。第二,出口商关注最贵的那些产品,舍弃那些便宜的产品,在那些销售品种少的市场中收益也更少。第三,在销售品种较少的目的市场,公司倾向于销售更贵的核心产品。最后,出口价格与公司内部不同产品的投入品价格正相关。本文的结论对贸易改革的效果和贸易促进政策的设计有重要意义。

Abstract:This paper argues that quality differentiation is an important feature of the operations of multi-product firms. Manufacturers vary product quality across their product range by using inputs of different quality levels. Firms’ core competency is in varieties of superior quality that bring higher sales despite being more expensive. We base these conclusions on four stylized facts that we establish using detailed customs data for China. First, firms earn more bilateral and global revenues from their more expensive products. Second, exporters focus on their top expensive goods, drop cheaper articles and earn lower revenues in markets where they sell fewer varieties. Third, companies sales are more skewed towards their core expensive goods in destinations where they offer less items. Finally, export prices are positively correlated with input prices across products within a .rm. We rationalize these stylized facts with a model of international trade with multi-product, multi-quality .rms. Our results have important implications for the effects of trade reforms and the design of trade-promoting policies.

作者:Kalina Manova 和Zhiwei Zhang 

来源:2013年10月发表的NBER Working Paper “Multi-Product Firms and Product Quality”(w18637)







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