6Greenaway D,Hine R and Milner C. Country-Specific Factors and the Pattern of Horizontal and Vertical Intra-Industry Trade in the UK[J]. Weltwirtschaftliches Archiv, 1994,130: 77-100.
7Falvey R E, Kierzkowski H. Product Quality, Intra-Industry Trade and (Im)Perfect Competition[C]// Kierzkowski H (Ed), Protection and Competition in International Trade: Essays in Honor of Corden W M , Oxford , 1987