Abstract: This article modifies the Melitz model of heterogeneous enterprises, analyses the years 2001-2010 panel data of China's major manufacturing industry, examine the main factors of influencing China's domestic market demand empirically. The results shows that “productivity paradox” exists in our country, higher market trade costs will have a negative impact on the domestic market. In order to expand domestic demand,the key is to reduce the excessive domestic trade costs.

摘要： 本文扩展了Melitz的异质性企业模型，通过对我国主要制造业2001-2010年面板数据的分析，实证检验了影响我国国内市场需求的主要因素。研究结果表明，我国确实存在“生产率悖论”，较高的国内市场贸易成本对国内市场需求产生不利影响，扩大内需关键是降低过高的国内市场贸易成本。