The article examines the innovative trends in the renewable power generation, taking into account the impact of crises, as well as the impact of renewable energy on air pollution in the world (environmental change). Hierarchical agglomerative and iterative methods of cluster analysis, as well as econometric models were used to test the hypotheses. Carbon dioxide emissions and renewable power generation for 78 countries during 2000-2020 are taken into account as the database of the study. The results showed that there are groups of countries with sharp, high, moderate and low growth rates of renewable power generation. In addition, the results of econometric analysis indicate that the growth of renewable power generation does not always cause a decrease in carbon dioxide emissions. For a number of countries (Australia, Canada, Mexico, Poland) such connection is not essential at all. The results of the study can be useful in shaping and adapting environmental strategies around the world.

The article is devoted to the question of regional digitalization and telecommunication development of Ukraine. The conceptual basis of telecommunication development (TCD) assessment by system analysis methods is provided. The status classification model of the region according to the TCD level was investigated.The forecasting models of the TCD level of the region are developed by Markov chain with discrete status. The regional features have been studied. The homogeneous groups of TCD regions have been formed. Visual analysis of the obtained clustering trees by hierarchical methods allowed to conclude about a stable and high-quality division into three clusters. There are clusters of the high, medium and low level of telecommunication. The dynamics of regional clusters moving is estimated. There is set of regions that have never changed their position all the time. Thus, Volyn region was included in the cluster of regions with the medium TCD level. Kharkiv region was included in the high level TCD cluster. The most regions were characterized by a change in level. We get the opportunity at the next stage of the study to estimate the frequency of transitions of regional systems from state to state and to determine the matrices of transition probabilities for each year separately. The forecast of TCD level has been made by stochastic modeling methods, the probabilities of regions falling into different states in 2021 have been estimated. The status of systems with low TCD are likely to be in the high-level group of regions with a probability of slightly more than 2 %. for two years. The probability that the system with medium level of development for two years will remain in the same group is 61,7%. The probability that the status will worsen is 13,8 %, and that will improve – 24,5 %. The probability that the region is stayed in the same group the next two years is 69.5 %. The probability that the high level TCD region is moved to the medium level cluster of regions is 27,6 %, and probability to the low level TCD is 2,9 %.

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Many studies are devoted to the peculiarities of building the information society in the modern world and the problems of uneven development of information and communication technologies in developed and developing countries. This paper examines the influence of the information and communication technologies development on the social and political activities of modern society. The correlation and regression analysis has been used to identify the relationship between the Information and Communication Technology Development Index (ICT), the Human Development Index (HDI) and the Democracy Index (DI). The results demonstrate that there is a close link between the countries' sociopolitical attractiveness and the level of their information and communication development. However, it is not equal for different countries, which are grouped by the level of ICT, HDI and DI. Besides, the country's information and communication technologies level has a significant effect on the social and political development. The development of the information component immediately leads to improvement of the socio-political sphere in countries with high levels of HDI, DI and ICT. The EU countries belong to this cluster. Democracy development and ICT have the inverse relationship in the group of countries with average HDI, DI and ICT levels.

Information technologies forward and change all processes that are taking place in the modern society. Recent literature has been analysed as for the vector of information society development, influence of information technologies on development of business communications and social institutions. Asymmetry of information processes in the world has been analysed as well. The aim of this research is to study the moderated role of countries' IT level and its influence on social and economic development. The realised econometric research of the global indices (ІСТ, Doing Business, Global Competitiveness Index) for 113 countries of the world indicate different intensity of information and communication development influence in certain groups of countries (identified by the ІСТ level) on their economic level.