TY JOUR TI Economic Efficiency Assessment of Oil Producers during the Transition to Added Income Tax KW oil and gas companies KW fiscal regime KW efficient exploitation of fields KW taxation systems KW tax burden KW economic efficiency JO Bulletin of Kemerovo State University. Series: Political, Sociological and Economic sciences AU Kamdina, L.. AU Simchenko, O.L. PY 2022 IS 7 PB Kemerovo State University