中间产品进口与企业出口质量

Imported Intermediate Inputs and Firm's Export Quality

文章采用2002—2006年中国制造业企业微观数据，借鉴Harrigan等（2011）的方法测算我国制造业企业出口质量指数，实证分析中间产品进口与企业出口质量之间的相关关系。研究发现，进口中间产品与企业出口质量间存在显著正相关关系，即进口中间产品对企业出口质量存在显著促进提升作用。通过将进口来源地划分为高收入国家和低收入国家进一步实证分析发现，高收入国家和低收入国家的中间产品都对企业出口质量存在显著促进提升作用，而从低收入国家进口的中间产品对企业出口质量的提升更大，即产品多样性互补效应的作用更大。另外，企业人力资本水平、研发营销、企业规模与企业出口质量呈显著正相关关系，而资本密集度与企业出口质量的相关关系并不显著。按照行业要素禀赋和贸易方式划分的分样本回归结果验证了实证结果的稳健性。

This paper studies how the varieties of imported intermediates affect the firms' export quality. Using a full set of micro-level data of Chinese manufacturing enterprises from 2002 to 2006,this paper empirically analyzes the impact of intermediate inputs on enterprises' export quality. The empirical results indicate that the intermediate inputs boost the improvement of enterprises' export quality. Dividing the import origin into high-income and low-income countries,we find that the imported intermediates from highincome countries and low-income countries simultaneously have strong positive effect on firms' export quality,the latter stronger.Besides,human capital,R&D investment and firms' scale have strong positive relation with export quality,while the effect of capital intensity is uncertain. The results of sub-samples regression testify the robustness of the conclusions.