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Achieving the United Nations' Sustainable Development Goals (SDGs) requires an overall and well-balanced achievement of all SDGs rather than cherry-picking a few. While it is vital to assess the evenness of SDGs achievement, such analysis, particularly on a global scale, is still evidently absent from the existing literature. To remedy such a scholarly gap, this paper measures the evenness of SDGs achievement for 193 countries from 2010 to 2019 by adapting the evenness assessment method originating from ecology and biodiversity literature. Our analyses regarding the country-level SDG evenness index scores (EIS) indicate a significant heterogeneity across countries. Global South countries usually underperform in the evenness of 17 goals, while a significant portion of Global North countries also suffer from the unbalanced developments in SDGs. By integrating the evenness measures into the conventional global SDG monitoring framework, this study identifies six development paths in pursuing the SDGs and shows that maintaining the overall SDGs improvements while balancing the development of each goal is practical but has not taken place in at least 35% of countries. We estimate that the SDG evenness and average performance could further increase by 3.5 p.p. and 2.1 p.p., or 74 percent and 50 percent of the growth in the baseline continue past paths scenario, respectively, if each country could follow the effective development path of frontier counterparts with similar income levels. Our SDG evenness measures, complemented by inter-temporal cross-country analyses, could inform policies and cooperation strategies to identify the weaknesses in sustainable development, boost effective growth, and protect unevenly developed countries. Future research could further develop these measures to provide deeper insights into achieving rapid and well-balanced development of SDGs at various levels.
Qi et al. (Sat,) studied this question.