文章从研究方法、经验证据和外包的生产率效应在中国的适应性三个方面对这一领域的实证研究文献进行了系统梳理，并做简要评论。
This paper summarizes these researches from methodology, empirical evidence and the suitability of productivity effect of outsourcing in China, and gives some brief comments.
但服务业产出增长相对较高，却不会对工业生产率增长产生同样的推动效应。
But relatively high growth of service output does not have the same propulsive effect on growth of industrial productivity.
关于技术溢出效应的证据比较有限，但外资比重大的产业生产率提高的幅度似乎也高于其他产业，从而显示出正效应。
Evidence on technology spillovers is more limited, but industries with higher FDI seem to have higher productivity increases than other industries, suggesting a positive effect.
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