Loss Assessment of Qualitative and Quantitative Composition of The Middle Class in Terms of Sustainable and Digital Development

The article studies the trends of quantitative changes in social class in Ukraine as an important factor of sustainable socio-economic development. The use of a complex criterion for determining the core of the middle class in the population structure is substantiated. It takes into account the level of income, self-identification, and qualitative characteristics. The article proves the hypothesis of conformity of the distribution of households by average per capita equivalent income to the theoretical log-normal distribution. The paper provides the quantitative characteristics of the impact of digitalization on the size of the middle class, determines the consequences of distribution of information technology for its existence. The main directions and tools for influence are proposed to ensure the conditions for the formation, development, and growth of the middle class in modern society, and to achieve a high level of economic development and welfare of the population.