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文章基于HS-6分位产品层面的国际贸易数据,遵循Hummels和Klenow(2005)的方法计算了1995~2011年中国进口增长的二元边际,并运用面板数据引力模型实证检验了知识产权保护对中国进口及其二元边际的影响。研究结果表明:目前中国的进口主要依靠集约边际的增长,但知识产权对中国进口积极作用则是沿着扩展边际而实现的;加强知识产权保护的市场扩张和市场势力效应分别作用于中国进口产品的种类和数量,而前者占据主导;知识产权保护增加一个单位,扩展边际增加约36%,集约边际约减少5%。
Based on the international trade data at the HS-6 quantile level, the article calculates the binary margin of China’s import growth from 1995 to 2011 according to the method of Hummels and Klenow (2005) and empirically tests the relationship between the protection of intellectual property rights by the panel data gravitation model The Import of China and Its Dual Marginal Influence. The results show that at present, China’s imports mainly depend on the growth of intensive marginalization, but the active role of intellectual property in China’s imports is realized along the expansionary margins. The market expansion and market forces that strengthen the protection of intellectual property rights act on the imports of Chinese products While the former dominates; the protection of intellectual property is increased by one unit, the expansion margin increases by about 36% and the intensive margin reduces by about 5%.