53 552.08 Baltic Shield GMDH GRU Granitoids LSTM RNN Ukrainian shield adequacy of models analysis and forecasting control system critical proportions financial security and financial management formation rapakivi increase accuracy of forecasting input-output table integrated system intellectualization intelligent control man-machine systems matrices of social accounts method modeling national accounts non-stationary processes organization of control systems share prices forecasting subsectors of the public sector system analysis system of financial balances of the national economy