出口产品多样性与中国制造业全要素生产率关系的研究——基于制造业行业面板数据的实证分析

Variety of exported commodities and total factor productivity: an empirical analysis of the panel data

本文首先通过理论分析阐述了有关产品多样性与生产率之间的关系,随后利用我国2001至2009年分行业面板数据进行了实证研究。研究发现:(1)我国的出口产品多样性与生产率大致上呈现出了负相关性,而且结果是稳健的。但对于具有不同特点的行业,其影响会有所不同;(2)从总体上来看,R&D投入和行业规模都对生产率有正向促进作用;外资因素和出口密集度也同样表现出了积极的影响;(3)本文没有发现加工贸易单独或通过多样性降低生产率的确切证据,这说明加工贸易不是导致我国出口产品多样性负作用于生产率的主要原因;(4)对于劳动密集型行业和资本密集型行业,出口产品多样性有着不同的作用,其对前者生产率的影响是不显著的,对后者生产率影响则是较为显著的负向作用。

This paper first discusses in detail the relationship between variety of exported commodities(VEC) and productivity and then studies empirically the panel data from 2001-2009.The results show that 1) VEC has negative correlation with productivity and the results are robust;2) R& D investment and industrial scale both have positive impact on productivity and foreign capital and export intensity also exert positive influence;3) Processing trade is not the cause of the negative correlation between VEC and productivity;4) The influence of VEC on the productivity of labor-intensive industries is insignificant while the influence on that of capital-intensive industries is significantly negative.