上游垄断对中国出口二元边际影响的实证研究

An Empirical Study on the Impact of Upstream Monopoly on the China’s Export Binary Margin

本文从上游行业视角出发,结合企业中间品价格、质量和规模三个维度,构建上游垄断、中间品投入和出口二元边际的理论模型,并利用2000—2013年中国工业企业数据库和海关贸易数据,采用GMM两步法构建计量模型进行实证研究。检验结果表明:上游垄断通过减少企业中间品投入抑制了中国出口二元边际的增长。异质性分析表明:上游垄断对本土企业、资本密集型行业出口二元边际的抑制作用较大,并且这种抑制作用会随着政府补贴规模的增加而增强。

From the perspective of the upstream industry,this paper constructed a theoretical model of upstream monopoly,intermediate input products and export binary margin by introducing three dimensions of intermediate products—price,quality and scale from the microcosmic perspective of firm. Then the GMM two-step methods were adopted to empirically test the influence and channels of upstream monopoly on export binary margin in China’s manufacturing enterprises based on the matched data of China’s industrial enterprise database and China’s customs trade data from 2000 to 2013. The empirical results show that upstream monopoly significantly inhibits the growth of the binary margin of China’s manufacturing export firms by increasing the price,reducing the quality and scale of intermediate input products. The heterogeneity analysis shows that upstream monopoly has stronger inhibition of export binary margin on the capital-intensive industry and local enterprises. Moreover,the larger the scale of government subsidy is,the stronger this effect will be.