The scarcity effect refers to the phenomenon that people change their buying behavior due to the scarcity of things, that is, when something becomes scarce or difficult to obtain, people will think that this thing is more valuable and more wanted. According to the above definitions, Which of the following do not reflect the scarcity effect:. ['The store hangs a discount banner for this day every day to attract a large number of customers.', 'Online sales of a certain brand of mobile phones are limited to buy, but the demand exceeds supply.', 'Xiao Zhang, who is struggling at the end of the month, depends on going to the supermarket to buy temporary food.', "Men think women's attractiveness index has risen when they snooze near bars."]