Oleksandra Kubatko

The recent surge in publications addressing household energy efficiency and renewable energy highlights their vital roles in managing national decarbonization and green power transition. The study aims to analyze the research trends in this field to comprehend their significance in shaping residential decarbonization changes. Bibliometric and visualization analyses are applied to bridge existing knowledge gaps by focusing on technology and managerial mechanisms for implementing energy efficiency and renewable energy concepts. Leveraging the Scopus database and VOSviewer 1.6.19 software, the study covers energy efficiency publications from 1978 to 2023 and renewable energy papers from 1984 to 2023. The study clusters academic articles in two ways: keyword co-occurrence and co-authorship analyses. The first one reveals the merging of renewable energy and energy efficiency studies, covering sustainable development, heating/cooling mechanisms, and emerging technology trends. While both topics share commonalities like smart grids and the Internet of Things, renewable energy clusters spotlight specific areas such as bioenergy and wind/solar power. Co-authorship analysis highlights a notable increase in countries considering research topics, reflecting growing international collaboration. Leading contributors include the United States, the United Kingdom, China, Germany, and India. This study equips scientists with a systematic understanding of the evolution and latest research trends in managing household energy efficiency and renewable energy transformations. It aids in identifying promising research directions, further advancing these crucial fields.

Acknowledgments
The publication was prepared in the framework of the research project “Formation of economic mechanisms to increase energy efficiency and provide sustainable development of renewable energy in Ukraine’s households” (No. 0122U001233), funded by the National Research Foundation of Ukraine.

There are continuous research and practical interest to combine different renewable sources within one Smart Grid network. The paper aims to estimate the influence of key economic and social drivers of renewable energy and Smart Grid promotion in OECD member countries. The random effect of the generalized least squares method was used to estimate the empirical model based on the World Bank, OECD, Heritage Foundation, and World Energy Council datasets for a panel of 36 OECD counties. For the empirical estimation, the dependent variables considered are energy renewable electricity output and energy trilemma index, taken as two proxies for Smart Grid development. The results suggest that an increase in GDP p. c. in national economies by 10,000 USD leads on average to a 3.9% decrease in renewable electricity output during 2001–2015. The richer the society, the less renewable energy sources were used for power generation in a group of OECD countries. The last is also supported by the fact that gross fixed capital formation treated as a percentage value of GDP is negatively correlated with structural changes in renewable energy output. The empirical conclusion is that during the study period, OECD countries were mainly oriented to economic growth, which was achieved by consuming non-renewable energy resources, and limited attention was paid to sustainability and Millennium Development Goals. The paper provides policy recommendations for Smart Grid development and points in the future research within OECD countries.

Acknowledgments
Comments from the Editor and anonymous referees have been gratefully acknowledged. Leonid Melnyk gratefully acknowledges financial support from the Ministry of Education and Science of Ukraine (0118U003578). Oleksandra Kubatko gratefully acknowledges financial support from the Ministry of Education and Science of Ukraine (0119U100766) and National Research Foundation of Ukraine (2020.01/0135).

Due to the full-scale war of Russia against Ukraine in 2022, extreme danger and vulnerability have caused changes in the social and economic stability of a person both on the individual and at the family level, in various social groups, as well as in territorial communities. Thus, the study aims to investigate the sources of social and economic resilience of Ukraine’s population during the war in the context of developing a social solidarity economy in Ukrainian society to maintain fragile stability. The paper investigates the main reasons for the displacement of Ukrainians, explores the living conditions in communities where they moved, and identifies the main socioeconomic factors for ensuring the resistance of the individual and the community in wartime. The paper applies the sociological survey involving 1,200 respondents. The results show that Ukrainians recognize the authority’s right to make authoritarian decisions. The analysis gives empirical evidence on the sources of social and economic resistance and sustainability in Ukraine. This includes quantifying the role of social and financial payments, examining the intensification of social and solidarity ties, and evaluating the importance of a social solidarity economy for resilience. The study revealed the directions of supporting stability within the social solidarity economy in Ukraine under war conditions. They include incentive programs for returning qualified personnel, powerful tools of social support, encouraging socially-oriented small businesses, remote employment, state and local programs to support public organizations, and financing local initiatives.

Acknowledgments
The publication was prepared within the project Jean Monnet Module “Social Solidarity Economy: implementing EU experience for Sustainable Development” (SSExpEU-101047518-GAP-101047518) (2022–2025), funded by the European Union.