贸易自由化、行业质量差异化程度与企业加成率

Trade Liberalization,Quality Differentiation of the Industry and Firms' Markups

文章将企业进口行为引入扩展的Melitz-Ottaviano模型,基于中国企业数据研究了行业质量差异化程度对贸易自由化与企业加成率关系的影响,发现:无论行业的质量差异化程度如何,最终品贸易自由化均降低了企业加成率,中间品贸易自由化提高了企业加成率;但是在质量差异化程度大的行业,贸易自由化对企业加成率的影响幅度更大。同时,该影响具有明显的异质性,依赖于企业的类型、企业的生产率水平、企业从事的贸易方式及所在行业的市场集中度。

By including the firms import behaviors in the extended Melitz-Ottaviano model and based on the data of Chinese firms, this paper discusses the impact of trade liberalization on the firms＇ markups by taking quality differentiation of the industry into account. The results show that no matter how the degree of the industry＇ s quality differentiation is, trade liberalization of the final goods significantly reduces the firms＇ markups but trade liberalization of the intermediate goods increases them. We further find that trade liberalization has greater impact on the markups in the industries with high quality differentiation and the impact has obvious heterogeneity which depends on the firms＇ type, productivity level, trade pattern and the market concentration.