Abstract:  The development of the Yangtze River Economic Belt is important to China's sustainableeconomic development and the construction of a new pattern of spatial economy. To stimulate the economic development potential of the Yangtze River Economic Belt, it is necessary that study the effect of FDI on economic growth. Based on the panel data of 108 cities from 2003 to 2016, this paper empirically analyses the effect of FDI on economic growth in the Yangtze River Economic Belt by using threshold regression model. The results show that FDI plays a positive role in promoting economic growth in the Yangtze River Economic Belt, and the effect depends on the increase of FDI utilizing ability, the expanding of FDI scale, the accumulation of human capital and the expanding of firm size. Moreover, the effect and the threshold of FDI on economic growth are different in different regions of the Yangtze River. In order to promote economic growth in the Yangtze River Economic Belt, we should further improve openingup, speed up the accumulation of human capital, cultivate corporate competitiveness, and implement differentiated development strategies.

Key words: Yangtze River Economic Belt , FDI, economic growth , threshold regression model

摘要： 长江经济带建设事关中国经济可持续发展以及空间经济新格局的构建，研究FDI的经济增长影响效应对于激发长江经济带经济发展潜力具有重要现实意义。本文基于2003—2016年108个地级市面板数据，运用门槛回归模型对FDI能否促进长江经济带经济增长进行了实证检验，结果表明：FDI对长江经济带经济增长产生积极影响，促进效果的产生有赖于当地FDI吸收能力的提升，FDI规模增大、人力资本累积以及企业规模扩张有利于发挥FDI在推动长江经济带经济增长中的作用。与此同时，FDI对经济增长的影响效果及其门槛效应在长江流域不同地区有所差别。鉴于此，本文提出未来应该进一步提高对外开放水平，加快人力资本积累速度，培育企业竞争力，重视区域差异化发展，以更好地发挥FDI促进作用，推动长江经济带经济增长。

关键词: 长江经济带 , FDI , 经济增长 , 门槛回归模型