摘要
本文运用理论模型分析不同类型对外直接投资(OFDI)对母国企业产出的影响机制,模型从中间品进出口视角,分析了水平型和垂直型对外直接投资的差异化影响。基于企业层面数据的经验研究发现,总体上OFDI对企业产出呈现促进效应。但是不同类型OFDI对产出的影响存在差异性,商贸服务型、前向垂直型OFDI能够促进企业产出增长;水平型OFDI只有在中间品出口比重高于门槛值,后向垂直型OFDI只有中间品进口比重高于门槛值时,才对企业产出呈现促进效应;研究开发型、没有中间品出口的水平型OFDI对产出呈现显著"挤出"效应。
This paper theoretically analyses the complicated impact of the different types of OFDIs on the output of home-country firms, and further introduces the perspective of imports and exports of intermediate goods to distinguish differences in impact between horizontal and vertical types of OFDIs. Based on micro-firm level data, this paper analyses and finds that OFDIs have a certain promotion effect on firm output. However, there are significant differences in the impact of OFDIs in their different subdivisions: business service OFDIs and forward vertical OFDIs can promote firm output. Only when horizontal OFDIs' intermediate goods export or backward vertical OFDIs' intermediate goods import exceeds a certain threshold value, horizontal OFDIs or backward vertical OFDIs can promote firm output, while R&D-oriented OFDIs and horizontal OFDIs without intermediate goods have a significant "crowding-out" effect.
引文
蒋冠宏(2016):《我国企业对外直接投资的“就业效应”》,《统计研究》第8期。
李磊、白道欢、冼国明(2016):《对外直接投资如何影响了母国就业?——基于中国微观企业数据的研究》,《经济研究》第8期。
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(1)这些变量主要包括工业销售额、营业收入、就业人数、固定资产总额、出口额和中间投入品总额。
(2)这里特别做出说明的是,本文之所以未同时考虑OFDI与其一阶滞后项的原因在于OFDI与其滞后项之间存在显著的共线性(VIF值远高于10),本文模型估计中分别进行了回归检验。
(3)由于工业企业数据库中没有2008、2009年工业增加值数据,本文利用收入法来进行测算,具体公式为增加值=本年应付工资总额+增值税+所得税+营业税+利润总额+本年折旧。对于缺失中间投入数据的年份,假设中间投入=总产值+增值税-增加值。2001年缺少增加值数据,则在对前述公式恒等变形后计算获得,即增加值=总产值-中间投入+增值税。为补充部分年份工资数据缺失,将“主营业务成本+管理费用”作为劳动工资成本折算基础,例如2009年工资=2008年工资×工资成本折算基础增长率。通过一系列会计等式对缺失数据进行补充,可获得计算TFP所需数据。
(4)下文中两个统计量分别简称K-P LM统计量和K-P F统计量。
(5)限于篇幅,本文只报告两步系统动态GMM结果。