Firms are increasingly using social media influencers to promote their products. We develop a two-period model to investigate a firm’s strategy for introducing a product via an influencer, where there is uncertainty in the influencer-product match. In the second period, the influencer exerts an effort to promote the product to her followers, who can spread the product information to non-followers via word-of-mouth (WOM). In the second period, the firm sells to the non-followers. We show that the firm’s pricing, production, and commission contract decisions depend on the influencer’s incentive-independent excess payoff from the promotion and on the difference between the WOM effect of followers who do or do not make a purchase rather than the WOM effect of each group. As the influencer’s incentive-independent payoff increase, the firm will increase (decrease) commissison rate and commission rate when the followers’ sensitivity to product price is relatively low (high) compared with that to the influencer’s effort. As the marginal WOM benefit of the first-period sales increases, the firm tends to reduce his unit net profit from sales. The influencer with a medium-sized follower base receives the highest commission rate and exerts the largest promotion effort. While the followers of influencers with a medium-sized follower base may pay the highest price. We also show that (i) there exists a threshold for the probability of match, above which the firm faces zero demand in the first period if an influencer-product mismatch occurs; and (ii) the firm may charge followers a lower price than non-followers, even though followers are less sensitive to price than non-followers. Finally, regarding influencer selection, we find that the firm may not be better off employing an influencer with a larger follower base.

Social networking sites (SNS) is an image-oriented sharing platform and can form social relationships among users. This allows individuals to create and share the contents which include their stories, ideas, reviews, opinions, and evaluations, etc. Consumers who sympathize with and trust these contents will follow them and form the relationships. Contents created and shared by individual users is more effective than advertisements delivered by brands in generating electronic word of mouth (e-WOM). Accordingly, opinion leaders and influencers who influence potential customers based on their opinions and style related contents have emerged in various fields such as health, fitness, fashion, beauty, food, and high-tech.

With social media spreading and social media influencers (SMIs) becoming popular and monetising their content, research on how they become entrepreneurs and the enterprising characteristics of SMIs remains limited. Due to this, the study examines through the use of case studies the evolution of hobbyist SMIs into professional entrepreneurs.

Advanced web technologies enable consumers can create and exchange the content in various social media platforms (SMPs). As an interactive communication channel, SMPs serve as a new and updated form of online community where consumers and companies benefit from each other. Due to its minimal threshold in cost and skills necessary for accessing these SMPs, consumers use SMPs to acquire information in addition to seeking for socialization, which affect a purchase decision making process (Wang, Yu, and Wei, 2012). With various benefits of using SMPs among consumers, product reviews and photos posted by the customers in SMPs perform as an emerging type of endorsement to other users of SMPs. Individuals who actively share and disseminate the such product/service related-contents often become micro-celebrities among SMPs users. According to DiSilvestro (2016), customers no longer trust advertising created by brands, but they prefer to reply on reviews via SMPs, and in fact, 67% of consumers visit SMPs to reviews generated by other customers. In this regard, increasing number of brands tries to find influential micro-celebrities to build positive brand image and provide meaningful customer engagement which potentially increase sales in the end (Khamis, Ang, and Welling, 2016). Despite the increasing popularity of SMPs and influencers to brands, marketers struggle to measure their returns on investment, such as customer retention and increased customer lifetime value (Hennig-Thurau et al., 2010). Thus, a focal interest of this study is the role of a sense of community in building participants’ positive relational outcomes for a given brand that implementing the promotional activities via SMPs (Hudson et al., 2016).

This study attempts to investigate consumers’ perceptual process of influencer advertising and its impact on brand attitude formation on social media. Perceived congruence between the influencer and the product and sponsorship disclosure are manipulated as key independent variables. In so doing, this study examines whether consumers can infer two types of motives (affective vs. calculative) from different levels of perceived congruence (high vs. low) and sponsorship disclosure (present vs. absent). The impact of multiple motive inference on brand attitude is also examined in this study. The result indicates that perceived congruence of influencer and posting has a significant effect on the affective motive inference. When the posting is perceived to be relevant to and expected from the influencer, the participants infer the affective motive of the influencer. However, the participants do not infer calculative motives from the incongruent posting of the influencer. As native advertising can obfuscate the boundary between editorial and commercial contents (Conill, 2016), perceived congruence is significant to successfully cover the posting as a natural posting by influencer and induce affective motive inference. In addition, the disclosure of sponsorship did not reveal any effect on the calculative and the affective motive inferences. Even though the disclosure of sponsorship can make viewers recognize an advertising intent (Boerman, Willemsen, & Van Der Aa, 2017), the message did not induce motives inference behind it. It is significant to investigate whether there are intervening variables that moderate the linkage between sponsorship disclosure and motive inference processing. Furthermore, affective motive inference impacted the attitude for the brand whereas calculative motive inference exerted no significant effect. These findings suggest that when the product promoted in influencer advertising is congruent with the influencer, consumers form positive attitude toward the brand through affective inference processing. To successfully implement influencer advertising, marketers should design a content congruent with the influencer’s original postings and encourage audience to engage in affective motive processing.

디지털혁명이 세상을 주도하는 기업 환경에서 경쟁력을 제고 할 수 있는 새로운 이론과 전략연구는 산업혁명 이후에 끊임 없이 제기되어왔다. 디지털 시대에는 인류 문명의 발전적 도약이 시장의 통찰력을 요구하는 방향으로 새롭게 진화하고 있다. 마켓 4.0시대에 변화된 환경에 맞는 마케팅 전략은 사람을 중심으로 하여 지인 간의 상호작용과 콘텐츠 생산 및 소비의 순환 서클을 구성하는 네트워크 구조로 가고 있다. 이에 SNS 뉴미디어를 통한 혁신적인 마케팅이 대두되고 있는데 그 중심에 서 있는 부류가 바로 소셜 인플루언서이다. 본 연구에서는 과거의 수직적인 마케팅이 아니라 수평적인 마케팅을 통해 소셜 미디어를 무대로 활동하고 있고, 소셜 마케팅의 새로운 주역이 된 인플루언서 마케팅 영역에 대한 필요성을 고찰하고 근간에 대한 이론적 요소를 정리하였다. 그리고 실제 소셜 인플루언서 활동에 대한 분석, 그리고 평가와 전략의 필요성에 대한 근거를 제시하고 그에 적합한 평가 도구를 제시하였다. 앞으로 인플루언서 평가 도구 활용을 통하여 SNS에 기반한 바람직한 콘텐츠의 전파가 기업과 개인에게 새로운 마케팅 강화 전략으로 발전할 수 있기를 기대한다.