This study investigates how foreign direct investment (FDI) contributes to green economic development by examining the underlying transmission mechanisms and the conditions under which these mechanisms are strengthened or weakened. Moving beyond the t...
This study investigates how foreign direct investment (FDI) contributes to green economic development by examining the underlying transmission mechanisms and the conditions under which these mechanisms are strengthened or weakened. Moving beyond the traditional static debate on whether FDI improves environmental performance, this paper focuses on the dynamic question of how and under what conditions FDI-generated technological spillovers are transformed into green economic outcomes. Using panel data for OECD countries, this study proposes and empirically tests a structural transmission framework in which industrial energy efficiency (IEE) serves as a key mediating channel linking FDI to the green economy (GE). The analysis further incorporates two external conditions: electricity price change (ΔPrice), representing market cost pressures and price instability, and government green R&D budgets (GRD), capturing policy support and technological absorption capacity. Rather than treating these factors as direct determinants of green outcomes, the study examines how they moderate the effectiveness of the FDI → IEE → GE transmission pathway. The empirical results indicate that FDI promotes green economic development primarily through improvements in industrial energy efficiency. However, large electricity price changes weaken both the absorption of FDI-related technologies and the conversion of efficiency gains into green economic performance along the FDI → IEE → GE transmission pathway. In contrast, government green R&D investment strengthens these transmission mechanisms by enhancing absorptive capacity and reducing the risks associated with technology adoption. Moreover, green R&D support partially offsets the adverse effects of electricity price changes, highlighting a joint moderation effect between market conditions and policy support. Overall, the findings demonstrate that the green impact of FDI is not automatic but highly conditional on market cost environments and policy frameworks. By clarifying the mediating role of industrial energy efficiency and the moderating roles of electricity price dynamics and green R&D investment, this study provides new insights into the mechanisms and boundary conditions through which FDI contributes to green economic development.