In response to the UN 2030 Agenda for Sustainable Development, this paper proposes a new National Sustainable Development Index (NSDI), based on the modification of the Human Development Index (HDI). The purpose of our research was to improve the widely adopted HDI index by incorporating more comprehensive sustainability perspectives, so as to help policy makers to better analyze the sustainability-related issues facing their countries. After clarifying the concept of sustainable development, our research suggests that this term represents a coordination and configuration of economic, social, and environmental aspects of development, with its major focuses on balancing intra-generational welfare and maximizing the total welfare across generations. We then put forward a novel NSDI framework including 12 indicators from dimensions of economy, resource environment, and society, and calculated the weights of 12 indicators using the entropy method. To further validate our proposed index, this paper also measured the NSDIs of 163 countries in the world, and compared this index with the HDI and other well-known modification indices of HDI. The results showed that the NSDI is a reliable and relative complete index for sustainable development assessment, which makes up for the shortcomings of existing indices.

While digital finance and renewable energy consumption (REC) are two timely issues, it remains unclear whether the former affects the latter, especially in developing economies. This paper examines the impact of digital finance on China’s REC between 2011 and 2018 and explores the underlying mechanisms. Results show that digital finance, along with its coverage breadth and usage depth, significantly improved REC in China and that digital finance in the area of credit has had the most significant impact. Additionally, the results show that loan scale and income level are the main mediation variables, through which digital finance affects REC. The findings also suggest that economic growth and technological progress have increased REC in China, while carbon dioxide emissions have had no meaningful effect on this consumption. The results further indicate that policymakers must pay close attention to the role of digital finance when formulating policies on REC. To promote REC and environmental sustainability, developing economies like China should strengthen the breadth and depth of digital finance development, focus on the influence channels of digital finance, and promote economic growth and technological progress.

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