Interrelationships among foreign direct investments, renewable energy, and CO2 emissions for different European country groups: a panel ARDL approach

This study estimated unbalanced panel data analysis to investigate the relationship among CO2 emissions, GDP, renewable and non-renewable energy utilization, and foreign direct investment (FDI) inflow in 26 European countries. Moreover, we investigated the role of environmental regulations in validation of the pollution haven hypothesis (PHH) in two EU country groups, namely 1–4th and 5th enlargement countries of EU, since their adaptation periods of environmental legislation may indicate differences. Empirical results confirmed the validation of environmental Kuznets curve (EKC) hypothesis and PHH for overall EU countries. However, results differ between country groups in EU. For example, while results confirm the evidence of EKC in 5th enlargement countries, they do not support in 1–4th enlargement countries. Moreover, while environmental regulations do not play an important role in the validity of PHH, they are important factors in the validity of EKC in overall EU countries. Granger causalities showed that economic growth causes energy consumption and FDI inflow. Since renewable energy mitigates the emissions, EU countries should enhance green technology and energy efficiency to ensure sustainable development. What is more, EU countries need to tighten the environmental regulations on FDI inflow. Therefore, our results support the new framework by European Commission on screening the FDI inflows throughout the EU zone.