Within-Industry Specialization and Global Market Power
研究发现出口价格差异主要由富裕和偏远经济体在行业高市场势力环节的专业化驱动，这种专业化解释了30%的贸易收益和37%以上的跨国收入不平等。
Export price levels exhibit tremendous cross-national and spatial variation, even within narrowly defined industries. Standard theories attribute this variation to within-industry quality specialization. This paper argues that a significant portion of the export price variation is driven by rich and remote economies specializing in high-market power segments of industries. I also argue that this particular pattern of specialization (i) accounts for 30 percent of the overall gains from trade, and (ii) explains more than 37 percent of the observed cross-national income inequality.