Effects of Cigarette and E-cigarette Flavors on Substitutability in the ETM

"This study does involve experimental manipulation of nicotine/tobacco product price and availability to understand consumers' behavior. Participants will be provided with a commercially available e-cigarette to use during the study, if they wish.~Every participant will purchase tobacco products in an online store under four different scenarios: a) cigarette flavor restricted and e-cigarette flavor restricted, b) cigarette flavor unrestricted and e-cigarette flavor restricted, c) cigarette flavor restricted and e-cigarette flavor unrestricted, d) cigarette flavor unrestricted and e-cigarette flavor unrestricted."