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In spite of the increasing organic and interactive marketing activities over social media, a general understanding of the source credibility of voluntary user-generated content (UGC) is still limited. In line with the social identity theory, this paper examines the effects of consumers' perceived source credibility of UGC in YouTube videos on their attitudes and behavioral intentions. Additionally, source homophily theory is included to predict the antecedent of source credibility.

Three hundred and seventy two Generation Y respondents were interviewed using snowball sampling. Data were analyzed with component-based structural equation modeling technique of partial least squares-structural equation modeling (PLS-SEM).

Findings confirmed that perceived source credibility indirectly affects purchase intention (PI) and electronic word-of-mouth via attitude toward UGC. Besides, perceived source credibility mediates the effect of perceived source homophily on attitude toward UGC.

Since today's consumers have begun to trust and rely more on UGC than company-generated content on social media when making purchase decisions, companies may reconsider democratizing certain aspects of their branding strategies. Firms may fine-tune their marketing communication budgets – not only just by sponsoring public figures and celebrities but also by nurturing coproductive engagements with independent content creators who are ordinary consumers. Endowed with their imposing credibility, these micro-influencers and prosumers have high potentials to be uplifted to brand ambassadors.

While consumers' purchase outcome can be measured easily using metrics and analytics, the roles of source homophily in stages leading up to the purchase is still elusive. Drawing on the rich theoretical basis of source homophily may help researchers to understand not only how credibility and attitude are related to PI but also how this nexus generates positive word of mouth among UGC followers within the social media circles.

With the ever-expanding online shopping, electronic word-of-mouth (eWOM) has become a significant factor affecting the consumer decision-making behaviour. This is specially the case when considering Generation Y (Millennials), who are old enough to be independent buyers and young to be almost immersed in online living. This article aims to assess the impact of eWOM on purchase intention by developing a conceptual model of hypotheses encompassing a multitude of factors that may be associated with this relationship.

The researcher investigates what factors impact eWOM credibility and make the consumer may adopt it when making a purchase. To examine our research model, a quantitative approach is employed for this purpose using a sample through online survey from Thailand – where there is a large number portion Generation Y consumer base.

It was found that source style as a visual attribute information is the most significant factor that may impact eWOM credibility in addition to source credibility, argument quality and source homophily, respectively.

From a practical point of view, it helps firms to understand what needs to be taken into consideration when building their marketing strategy.

This is believed to add significant insights into the eWOM literature by identifying its route of impact toward the purchase intention on Generation Y.

This study aims to examine customer helping and advocacy behaviours within dyadic financial service relationships involving customers and fellow customer helpers.

The gift-giving literature was used to propose a customer-to-customer interaction model, which was tested and cross-validated among electronic banking customers in South Africa (n = 404) and Australia (n = 244). Self-administered questionnaires were distributed to respondents who are users of electronic banking services and who previously received help with the service from a fellow customer. Data analysis included multi-group structural equation modelling.

The findings support the view that selected source credibility dimensions may influence greater affective commitment towards fellow customer helpers at various levels. Subsequently, further altruistic gift-giving in the form of customer helping and advocacy behaviours may result from higher levels of affective commitment. Feeling secure in their relationships with fellow customer helpers, customer recipients of help are likely to further socialise other customers who may share a common interest in the service category (e.g. electronic banking), but do not necessarily support the financial service provider of the customer.

The findings extend the conceptual domain of affective commitment and shed light on the factors contributing to the development of strengthened bonds between customers and fellow customer helpers within dyadic financial service relationships. Additionally, greater financial service socialisation and use may be achieved when the helping and advocacy behaviours of customer helpers are not restricted to a specific service provider. Subsequently, the current investigation advances knowledge of the underlying processes involved in motivating these desired service outcomes and behaviours.

This paper aims to investigate an integrated, holistic assessment of the characteristics by which consumers judge non-sponsored product review video (PRV) source, message and medium components as credible, and how these are linked to personal values for a deeper understanding of multidimensional credibility assessments of PRVs.

Employing a means-end approach, the authors draw on credibility theory and the persuasion knowledge model to analyse data from 21 in-depth semi-structured laddering interviews.

First, the authors demonstrate distinctive contributions of the video modality towards PRV credibility assessments and the interplay between specific PRV characteristics, cognitive and socio-emotional consequences, and personal values in an ongoing process of credibility assessment. Second, high persuasion knowledge creates awareness of the potential phoniness of the market, revealing a dark side to PRV use even in non-sponsored PRV seemingly created and shared as an act of benevolent concern between consumers.

This paper focused on the credibility of non-sponsored PRVs, future studies might investigate motivations and attributes by which users judge sponsored reviews. Also, the roles of specific product categories and existing brand trust on PRVs credibility provide avenues for further research.

This research offers practical implications for reviewers and brand managers to leverage the unique informational values of video by focusing on the interplay between credibility attributes and customer values.

This work advances credibility theory in the PRV context by examining how non-sponsored PRVs are evaluated as credible, by highlighting consumer persuasion knowledge and scepticism and including the holistic effects of the interplay between source, message and video format characteristics and by linking these to consumers’ goals and values.

This study aims to examine the influence of homophily in an online community and the effect of electronic word of mouth (eWOM) consensus on young consumers’ attitudes.

This study implemented an experimental research design using a two (low/high homophily) × two (low/high eWOM consensus) mixed factorial design. This study explores young consumers’ changes in brand attitude after encountering negative eWOM.

The results indicate that a high consensus of negative eWOM among online community members leads to significant changes in attitude, while a low consensus of negative eWOM does not produce such an effect. Negative eWOM from either high or low homophilous sources produces significant changes in attitude. There are significant attitude changes when a strong consensus of negative eWOM is received from a source with a high level of homophily.

Service failures in offline service settings lead to the dissemination of negative eWOM on social media. To handle and prevent social media crises, researchers should understand online crises antecedents relating to information characteristics i.e. eWOM consensus and characteristics of online community members to evaluate the crises impact. Brands should monitor tone and dialogue of online community member on social media to remedy and diminish any damage done to their brand image from negative eWOM.

This study contributes to the application of social network theory by understanding the role of nodes on negative eWOM effect in social media.

The study examines how the three dimensions of homophily (attitude, background, and value) influence the perceived usefulness, credibility, and enjoyability of travel content and follower behavior (i.e. willingness to search for more information and intention to visit the destination and purchase the tourism product). Likewise, the study investigates how content perception influences follower behavior.

A sample of 621 Instagram users from generations Y and Z who follow at least one travel influencer and intend to travel in the next twelve months was collected through an online survey. Partial least squares structural equation modeling was adopted to examine the data.

Attitudinal homophily influences follower behavior, value homophily impacts content perception, and background homophily has a counterproductive effect. Likewise, content perceived as useful and credible induces the intention to visit and purchase the tourism product.

The generalization of the results must be performed with care, as the context of analysis is limited to a social platform and only includes Portuguese individuals.

The findings help managers better understand which homophily cues influence content perception and maximize influencer persuasion. Based on the results, they can better decide which travel influencers should endorse their tourism products.

Research on homophily has neglected the multidimensionality of the concept and its analysis in the tourism context. By using a consolidated approach to homophily, content perception, and follower behavior, this study contributes to the tourism marketing literature and expands influencer marketing research.

Word-of-mouth (WOM) literature has identified the roles of source and message in WOM influence, but the relationship between them is yet to be investigated. The purpose of this paper is to explore this relationship by examining the mediation of message on the impact of perceived source characteristics from the perspective of the receiver. The paper also considered the mutual relationships between source characteristics and message quality.

A quantitative survey of prospective students was conducted to empirically examine the proposed conceptual model. A sample of 509 respondents was analysed using structural equation modelling.

The findings suggest the significant impact of expertise, trustworthiness, homophily and opinion leadership of the WOM source on the judgement of message quality and the indirect effects on WOM influence mediated by the message quality. The results also indicate the moderating effects of receiver involvement and the valence of the message on the impact of message quality.

The findings of this paper can inform the strategic development of WOM marketing. A deeper understanding of source characteristics and the role of the message may enable marketing practitioners to better target appropriate influencers for seeding programmes that stimulate WOM communication about their brands or products.

This study examines how the receiver’s evaluations of message content mediate the relationship between source characteristics and WOM influence. Source and message are two elements of communication which are processed when people receive information. However, nascent research examines their effects on each other. This research contributes to the understanding of this relationship through an empirical examination of the direct effects of primary source characteristics on perceived message quality.

As a new communication paradigm, social networking sites (SNS) have boosted information diffusion and viral marketing. Prior researchers have identified various factors affecting information dissemination on SNS. However, they often focus on limited factors and there is a lack of an integrated theoretical framework that explains aspects of relevant factors. Besides, the research on the impacts of relationships on individual retweeting behavior is still controversial. The purpose of this paper is to propose a theoretical framework to systematically investigate the determinants of individual dissemination behavior on SNS based on the elaboration likelihood model (ELM). Moreover, the authors also examine the relative importance of those relevant factors.

The authors randomly selected 1,250 members of Twitter and crawled posts published by each member since he/she created the Twitter account using Twitter API. The authors processed the data to create panel data and tested hypotheses with the panel logit model.

Factors both on the central route and on the peripheral route of ELM have positive impacts on individual dissemination behavior. Among them, information receiver-related factor and relationships-related factors are the most influential. Contrastingly, source-related factors are the least influential. Furthermore, the authors find that social tie strength mediates almost 50 percent of the effect of value homophily on individual dissemination behavior.

The authors are the first to directly apply ELM to examine individual dissemination behavior on SNS. By integrating factors into the two information processing routes, They incorporate relevant factors into the model and systematically analyze their impacts on individual retweeting behavior on SNS. The research offers at least one explanation for the contradictory findings about the effect of homophily on individual sharing behavior in previous research. The authors propose new variables that gauge topical relevance and interpersonal value homophily on SNS.

This study explores the effects of interpersonal determinants (tie strength and homophily) and informational determinants (source trustworthiness and customer endorsement) on perceived positive electronic word-of-mouth (eWOM) review credibility (PPERC), which subsequently affects attitude toward the product (ATP), attitude toward the Fan Page (ATFP), and eWOM review adoption (ERA) based on the cognition-affection-behavior (CAB) model.

The research sample consists of 402 subjects who used the Fan Page of Fashion Guide for more than one year. This research adopts a Structural Equation Modeling (SEM) to test the proposed model, which shows a good fit.

The results indicate that tie strength, homophily, source trustworthiness and customer endorsement each have a significant and positive effect on PPERC, respectively. In addition, homophily has a significant and positive effect on the strength and source trustworthiness. Furthermore, the results reveal that PPERC has a significant and positive effect on ATP, ATFP and ERA.

This study contributes to the literature by integrating multi perspectives and factors from informational determinants and interpersonal determinants. In addition, this study proposes that these determinants affect ERA via PPERC and dual attitudes (ATP and ATFP).

This paper aims to examine when travelers are more influenced by friends (word-of-mouth [WOM]) with limited knowledge of hotels but an understanding of the traveler, and when by review sites (electronic word-of-mouth [eWOM]) which have immense experience of hotels but cannot know the individual traveler. Sites such as TripAdvisor® offer millions of reviews, and travelers often reduce that to a manageable amount by focusing on reviews by writers who show homophily, i.e. are similar to them in terms of travel interests. These sites represent a form of eWOM recommendation; what is not clear is how much they replace or augment traditional WOM.

Dual-method content analysis of semi-structured interviews with a heterogeneous purposive sample of regular users of TripAdvisor (N = 30), followed by a survey of TripAdvisor users (N = 237).

Friends were considered the most credible information source, although friends showing greater homophily were more valued than others. However, in some circumstances, subjects found eWOM more credible: when they wanted greater certainty in their hotel choice, so complete information was important; when the hotel was for a special occasion or special people; and for feelings of empowerment. Most subjects compared all sources rather than relying on one.

This study reminds hotel managers that while eWOM is accessible and analyzable, it may not fully represent guests’ opinions; hotels’ marketing strategy should balance it with other recommendation networks. As guests compare sources, consistency in all forms of customer engagement is also essential.