TY JOUR TI FORMATION OF CONSUMER BEHAVIOR: ANALYSIS OF METHODS, ESSENCE AND FEATURES KW consumer behavior KW cardinalist and ordinalist approach KW theory of consumer behavior KW theory of revealed preferences KW stages of consumer behavior formation KW digitalization JO Trade, service, food industry AU Tolstihina, E.I. AU Demchenko, S.K. PY 2022 IS 2 PB Siberian Federal University