Global value chains,firms, and wage inequality: Evidence from China

How does participating or moving to more upstream in the global value chains (GVCs) affect the premium paid to skilled compared to unskilled labor within firms? In this paper, we develop a model of heterogeneous firms with intermediate trade and two skill inputs, in which we apply the fair wage hypothesis to predict the wage premium changes according to firms' GVCs activities. The model predicts that firms' backward GVC participation, as measured by the share of foreign value-added content in exports (FVAR), has an ambiguous impact on wage inequality of skills, which depends on the relative importance of “FVAR-labor substitution effect” and “FVAR-profit effect.” However, moving to upstream sectors in GVCs, as measured by the export varieties' upstreamness (or average distance from final use), raises a firm's wage premium. Using detailed Chinese firm-level data from 2000 to 2006, we develop a Mincer-type empirical model to study the wage premium changes associated with FVAR and upstreamness. We find robust empirical evidence that the rise of wage inequality in China mainly arises from moving to more upstream sectors rather than changing GVC participation.