The Effects of Foreign Direct Investment on Green Technology Innovation: New Evidence from China’s 278 Cities

Foreign direct investment (FDI) has played a pivotal role in fostering economic development, and the FDI technology spillover effect is one of the core forces driving an open economy toward new green growth milestones. Evaluating the impact of FDI inflows on green innovation is essential for sustainable and environment-friendly city design. Based on the panel data of 278 cities in China from 2010–2019, we conducted an empirical analysis to test the impact and mechanisms of FDI on green technology innovation (GTI). The results demonstrate that FDI has a positive and highly significant effect on GTI. The channel analysis indicates that the FDI significantly stimulates urban GTI through two mechanisms: alleviating financing restraints and mitigating the risk of new GTI in the early stages. In the heterogeneity analysis, we find that the FDI effect is more pronounced in China’s resource-based regions with high levels of institutional and human capital and in regions with low-carbon pilot policies and good protection of intellectual property rights. Furthermore, the study shows FDI can affect GTI in neighboring areas through spatial spillover effects. Our findings underscore the importance of encouraging and sustaining internationalization in environmentally friendly sectors to foster green transformation. In essence, developing foreign investment policies and enhancing the green technology spillover effect of FDI are vital for strengthening GTI capacity.