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本文利用CEPII BACI 1995~2010年中国对世界各国进口的HS6分位贸易数据,采用贸易引力模型来估计出口目的国加强知识产权保护对中国出口的三元边际的影响。三元边际即中国出口的种类——出口的广延边际,以及出口的数量——出口的集约边际的影响,然后将出口的集约边际又分解为价格指数和数量指数。由于中国出口存在很多零贸易值,同时采用Tobit模型处理了零贸易值以及采用工具变量处理了模型的内生性问题。研究发现,出口目的国加强知识产权保护会提高中国出口的产品种类,减少中国出口的产品数量,对价格指数的影响为负。
Based on the CEPII BACI trade data of HS6 quantiles imported by China from 1995 to 2010 to all countries in the world, this paper uses the trade gravity model to estimate the impact of the IPR protection on the ternary marginalization of China’s exports. The ternary margins, the type of Chinese exports - the broad margins of exports, and the volume of exports - the marginalization of exports, then divide the export-intensive marginalization into price indices and volume indices. Since there are many zero trade values in China’s exports, Tobit models are used to deal with the zero trade value and the endogenous problems of the models are dealt with using the tool variables. The study found that strengthening the protection of intellectual property by exporting countries will increase the product range of China’s exports, reduce the number of products exported from China, and negatively affect the price index.