Impact of Social Media Influencers on Millennial Purchase Intentions

Thesis Abstract

The pervasive influence of social media and the rise of social media influencers have significantly transformed consumer behavior, particularly among the millennial demographic, whose purchase intentions are increasingly shaped by digital endorsements. This study investigates the impact of social media influencers on millennial purchase intentions, aiming to elucidate the mechanisms through which influencer marketing affects consumer decision-making and to identify the key factors that mediate this relationship. The research is driven by the need to understand how influencer credibility, perceived authenticity, parasocial interactions, and advertising value influence millennials’ behavioral intentions, with implications for marketers seeking to optimize digital marketing strategies. Employing a quantitative research design, the study targeted a population of 1,200 millennials aged 23-38 years residing in urban areas, from which a stratified random sample of 400 respondents was selected to ensure representativeness across gender, education, and social media usage patterns. Data were collected through a structured questionnaire comprising validated scales adapted from previous studies, measuring variables such as influencer credibility, authenticity, parasocial interaction, purchase intention, and attitude towards influencer marketing. The instrument’s validity was confirmed via expert review, and reliability was assessed using Cronbach's alpha, with all constructs exceeding the threshold of 0.7. Data analysis involved descriptive statistics to present demographic profiles and variable distributions, followed by inferential techniques, primarily multiple regression analysis, to examine the relationships between influencer-related variables and purchase intentions. Structural equation modeling (SEM) using AMOS was employed to test the hypothesized mediation effects of perceived authenticity and parasocial interactions within the influencer–consumer relationship framework. The theoretical underpinning integrates the Source Credibility Theory and the Social Cognitive Theory to explain how trustworthiness, expertise, and social learning processes influence consumer attitudes and behaviors. Preliminary findings are expected to demonstrate that influencer credibility significantly predicts purchase intentions, mediated by perceived authenticity and parasocial engagement. The analysis aims to reveal that when millennials perceive influencers as authentic and engaging, their likelihood of purchasing promoted products increases substantially. Additionally, the study hypothesizes that source expertise and trustworthiness directly influence perceived authenticity, which in turn affects behavioral intentions. It is anticipated that these relationships will support a comprehensive model whereby influencer characteristics and consumer perceptions jointly drive purchase decisions. This research contributes to existing marketing literature by providing empirical evidence on the psychological mechanisms through which influencer marketing shapes millennial consumer behavior. The findings offer valuable insights for digital marketers and brand managers seeking to harness influencer partnerships effectively. The study also enhances understanding of the moderating role of consumer skepticism and media literacy in differentiating levels of influencer effectiveness across diverse demographic segments. The study concludes that influencer authenticity and parasocial relationships are pivotal in converting influencer endorsement into actual purchase behavior among millennials. Recommendations include encouraging authentic influencer content, fostering genuine engagement, and developing transparent disclosure practices to maintain consumer trust. Further research is suggested to explore longitudinal effects of influencer marketing, incorporate cross-cultural comparisons, and assess the impact of emerging social media platforms. Overall, this study underscores the strategic importance of influencer credibility and consumer perception constructs in enhancing marketing performance within digital ecosystems.