The impact of foreign direct investment on innovation at domestic firms: Evidence from the deregulation of foreign investment in China

This paper studies the impact of foreign direct investment (FDI) on innovation by domestic firms in China. A difference-in-difference estimation strategy yields causal evidence by exploiting China's deregulation of FDI in 2002. Analysis of a matched firm–patent data set from 1998 to 2007 shows that both the quantity and quality of innovation by domestic firms benefited from the presence of FDI. Emphasizing the importance of knowledge spillover from FDI in similar technology domains, the authors examine the role of horizontal FDI and FDI in technologically close industries—those sharing similar technology domains. Findings show that the latter generates much more substantial positive spillover than the former. The paper also shows that knowledge spillover from FDI in similar technology domains is not driven by input–output linkages. In addition, the spillover effect is stronger in cities with higher human capital stock and firms with higher absorptive capacity.