Abstract
Sustainable innovation strategies have been taken very seriously by the European Union (EU), which aims to reduce energy consumption and environmental pollutants emissions. For the sake of testing the sustainable performance of EU countries empirically, this research evaluates the sustainable innovation efficiency (SIE) of EU countries through a DEA-SBM model and analyzes the convergence trends of the EU regions by convergence analysis. The results show that the EU has attached great importance to sustainable innovation efficiency, indicating that the EU makes a concerted effort in technological innovation, energy saving, and environmental protection. Significant differences exist in SIE among EU regions, even though the southern region has the highest efficiency. In addition, there are distinct convergence trends in regional sustainable innovation efficiency. Control variables have significant impacts on the convergence of SIE in the EU regions. Furthermore, policymakers are also provided with useful decision support for regional sustainable innovation, energy conservation, and emission reduction policies.
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