我国贸易多样性的影响因素和生产率增长——基于内延边际与外延边际的考察

China′s Trade Variety and Industrial Productivity Growth

依据Feenstra等人的检验方法,本文测算了中国省份层面的初级品和制成品贸易多样性,结果发现,制成品进口多样性的地区区域出现扩散形态,而出口多样性走向区域趋同。在计算样本期我国省份TFP指数基础上,研究进一步考察了贸易多样性与生产率增长的双向关联,结果发现,除了科研投入,贸易多样性成为我国生产率提高的重要因素;就贸易多样性扩张来看,显性或隐性壁垒以及汇率波动干扰等构成壁垒因素,而TFP指数、科研投入、产业结构差异化、中小企业规模都成为其贡献因素。

Based on Feenstra′s methods,this paper calculates the level of China′s trade variety for both primary and manufactured goods.The reslut shows that our country has imported manufactured goods diversely,but exported concentratedly.By the calculation of China′s TFP index ,our study further investigates the relationship between trade variety and productivity growth,and found that both scientific research and trade variety are important factors promoting industrial productivity.As for the expansion of trade variety,there existed resistance factors such as trade barriers and exchange-rate fluctuations,while the TFP index,scientific research,industrial differentiation and SMEs are postive variables for varierty growth.