Global value chains and the effects of outsourcing and offshoring on firms: Evidence from matched firm-employee data

This paper studies the effects of outsourcing and offshoring on the skill structure of firms. The study verifies whether controlling for both activities in one model alters previous empirical studies, which controlled only for one factor in their models; whether controlling for destination country of outsourcing and offshoring brings new insights; and whether controlling for occupational level of workers when defining skills brings additional contribution to the results. Regarding the latter, besides the conventional approach for defining skills, i.e. the educational level, skills are also defined by three major occupational groups; Managers, Professionals and Technicians. To empirically estimate the abovementioned hypotheses, a matched employer-employee dataset for Slovenian manufacturing and service firms during 1997 to 2010, and the methods for panel data analysis were used. Results of the model on average show a positive impact of offshoring on the skill share of firms, while the results for outsourcing are uncommon. When controlling for high- and low-income countries, the results for manufacturing firms show a positive and similar effect of offshoring to both groups of countries on the share of skilled employees. In service firms, results show a weaker impact of offshoring to high-income countries on the relative employment of skilled, compared to offshoring to low-income countries. When taking into account also occupational levels for defining skills, the results show that the impact of education differs between occupational groups, indicating that firms differentiate between more and less educated individuals within the same occupational group.