Offshoring, either as FDI or offshore outsourcing, is a phenomenon of increasing importance that has been widely studied in the economics literature. Studies analysing the impact of offshoring on the labour market report divergent results. In this paper we develop a meta-analysis of the empirical literature that estimates the effect of offshoring on wages. We find that, after correcting for the presence of publication bias, the average effect is not significantly different from zero in either the origin or the destination countries. We also find that the wage impact of offshoring depends on methodological characteristics of the primary studies, such as the way offshoring is measured, the nature of goods/services that are offshored, the workers’ skill level, the unit of analysis, the structure of the data, and the estimation technique.

离岸外包，无论是FDI还是离岸外包，都是一种越来越重要的现象，在经济学文献中已得到广泛研究。分析离岸外包对劳动力市场影响的研究报告了不同的结果。在本文中，我们对经验文献进行了荟萃分析，以估计离岸外包对工资的影响。我们发现，在纠正了出版偏见的存在之后，无论是原籍国还是目的地国，平均影响都没有显着不同于零。我们还发现离岸外包对工资的影响取决于基础研究的方法学特征，例如离岸外包的计量方式，离岸商品/服务的性质，工人的技能水平，分析单位，数据和估算技术。