Justification of the sectoral approach in the study and modeling of economic dynamics processes

The article is devoted to the analysis of theoretical approaches to the study of economic cycles and modeling of economic dynamics that determine the phases of the cycle based on macroeconomic indicators, aggregated data and an industry approach. The specifics of each individual industry and the features of its response to external and internal economic changes are taken into account. The indicators of gross added value, turnover of organizations, investments by industries of the economy for the period since 2005 are considered. The analysis made it possible to group industries depending on the nature of their dynamics.