Scarcity Appeals in Advertising: The Moderating Role of Expectation of Scarcity
通过三项研究，发现稀缺诉求对产品评价的影响受消费者稀缺预期的调节：预期高时效果正面，预期低时无效；认知负荷是边界条件。
Advertisers often use scarcity appeals to influence consumers, with announcements such as "hurry, limited quantities," and "limit: two per customer." Based on a persuasion knowledge framework, we show in three studies that the effect of scarcity appeals on product evaluation is moderated by consumers' expectation of scarcity, such that scarcity appeals have a positive effect when expectation of scarcity is high but not when it is low. We also show that this interaction effect holds for expectation of scarcity due to demand as well as supply, and that cognitive load constitutes a boundary condition for this effect. These findings contribute to the literature by identifying expectation of scarcity as a moderator, persuasion knowledge as a mechanism, and cognitive load as a boundary condition for the effect of scarcity appeals on product evaluation. From a managerial perspective, this research indicates that scarcity appeals are more effective when consumers have high compared to low expectations of scarcity; that activation of persuasion knowledge can eliminate the positive effect of scarcity appeals; and that cognitive load can reinstate the positive effect of scarcity appeals on product evaluation.