TY JOUR TI Methodological approaches to estimating the impact of changes in tax legislation on tax income of mineral mining tax KW taxation KW tax legislation KW mineral mining tax KW tax income KW tax rates KW tax preference KW budget JO The Economy under Guard AU Shmakova, M.N. PY 2021 IS 2021 PB Nizhny Novgorod Academy of the Ministry of the Interior of Russia