Impact of value-consciousness and brand-self value congruity on sustainable luxury brands and commodities

Drawing on Self-Congruity and Equity Theories, this research examines the distinct impacts of communicating uniform sustainability initiatives for luxury brands versus commodity brands. This paper introduces a conceptual model that highlights the moderated mediation effect of brand-self value congruity and the three-way moderating effect of value-consciousness on the adverse impact of sustainability on luxury versus commodity brands. The findings from two experimental studies demonstrate that communicating sustainability initiatives has distinct effects on different brands. Specifically, sustainability initiatives enhance the evaluations of commodity brands but diminish the evaluations of luxury brands. The negative impact of sustainability on luxury brands is mediated by brand-self congruity. Moreover, value-consciousness moderates the relationship between sustainability and luxury brands, such that low value-conscious consumers tend to value sustainable luxury brands less than their non-sustainable counterparts, unlike high value-conscious consumers. These findings offer valuable managerial and practical insights for brand managers and communication strategists considering adopting sustainability communication strategies.