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This paper presents a conceptual model of the impact of social media influencer power on consumer attitudes toward a brand. The research uses naïve theories of social influence, consumer socialization theory and market signaling theory to support the contention that social media influencer power will impact consumer brand attitudes. However, the impact of the social media influencer power on consumer brand attitudes is posited to be mediated and/or moderated by the social media influencer source credibility. In turn, the social media influencer source credibility is modeled as being positively related to the social media influencer’s expertise/competence with respect to the product, the social media influencer’s goodwill toward the consumer, and the social media influencer’s trustworthiness.



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