TY JOUR TI THE USE OF MATHEMATICAL STATISTICS TOOLS IN THE STUDY OF THE LEVEL AND DYNAMICS OF LABOR PRODUCTIVITY KW econometrics KW mathematical statistics KW labor productivity JO MOSCOW ECONOMIC JOURNAL AU Morozova, T.A. AU Gelmiyarova, V.N. AU Gorshunova, T.A. AU Manaenkova, T.A. AU Korneev, A.D. PY 2024 IS 9 PB Electronic science