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The purpose of this research is to evaluate the extent to which credibility of news sources and fact-checkers individually and jointly influence online users' beliefs and intended behaviors regarding online misinformation. The broader goal is to understand why fact-checking seems to have inconsistent effects on the beliefs and behavioral intentions about disinformation. 10;

An online experiment was conducted in a public health (COVID-19) context with 429 validated participants to test three hypotheses linking the main and interaction effects of two independent variables (news source credibility and fact-checker credibility) on three dependent variables (users' believability, reading intention and sharing intention of online news claims). The data was analyzed using multilevel (fixed effects) models controlling for individual differences, claim differences and order effects.

The author observed a nuanced pattern of effects; news source credibility had a positive main effect on believability but negative effects on reading and sharing intention; fact-checking credibility had a positive main effect on believability, but no effects on reading or sharing intentions, but negatively moderated the effects of source credibility on all three dependent variables.

This paper introduces, conceptualizes and tests whether a more credible fact-checker shapes the beliefs and intentions about online misinformation differently from less credible fact-checkers, especially when examined concurrently with similar effects of the original sources of misinformation claims. Additionally, it suggests that, on average, users have a low perception of credibility for fact-checkers (even reputed ones), which may explain why fact-checking is often ineffective in shaping the beliefs and intended behaviors.

Word‐of‐mouth is a powerful communication tool which is often beyond the control of the marketer. This study used a 3 x 2 x 2 factorial experiment in a laboratory simulation to examine the main and interaction effects of three independent variables — message, source and user‐type — on credibility and behavior intention. The experiment involved 1,440 respondents from two different demographic sample groupings — secondary school students and undergraduates. ANOVA results for the experiments showed that, generally, source and user‐type were found to be significant factors affecting the credibility of word‐of‐mouth. In terms of source, father was perceived to be more credible than close friend as a word‐of‐mouth source. Likewise, past users were found to be more credible than non‐past users. Message was, however, found to affect significantly the behavioral intention variable. Negative message was found to generate the strongest negative behavioral intention than positive message and two‐sided messages. Two‐sided message was also found to have a stronger effect than positive message in behavioral intention. In addition, t‐tests results also revealed significant differences in perceptions between the two samples.

Through two experiments, this study assessed source and message effects of Instagram-based pro-veganism messages.

Experiment 1 (N = 294) examined effects of organization (brand vs nonprofit) and message types (egoistic vs altruistic) on consumer responses to Instagram-based pro-veganism content. Experiment 2 (N = 288) examined effects of source type (celebrity vs noncelebrity) and message valence (positive vs negative) on consumer responses to Instagram-based pro-veganism content.

Results demonstrated significant main effects of organization type, with consumers indicating more positive attitudes and higher credibility toward the brand. Significant main effects of message type were also found, with altruistic messages eliciting higher perceived information value than egoistic messages. Subjective norms had moderating effects on attitude toward the organization, while attitude toward veganism had moderating effects on perceived information value. Results also indicated significant main effects of message valence on perceived information value of pro-veganism Instagram posts and significant interaction effects of the two manipulated factors on intention to spread electronic word-of-mouth (eWOM) about pro-veganism.

Implications for use of Instagram-based health marketing communication about veganism were discussed. Specifically, organizations looking to use social media to influence attitudes and behavioral intentions toward health issues should seek to reach their target audiences through selecting endorsers and messages that will optimally present the health issue in a relatable and engaging way.

This study aims to examine the effects of different types of endorsers (expert vs consumer vs celebrity) in testimonial vs non-testimonial message contexts on consumers’ responses toward direct-to-consumer advertising (DTCA).

An online experiment was conducted with a 3 (endorser type: expert vs consumer vs celebrity) × 2 (message type: testimonial vs non-testimonial) plus control group (no endorser, no testimonial) factorial design to assess the various dependent variables.

Perceived source credibility and similarity was significantly different across the endorser types, and the expert endorser (i.e. a doctor) generated the highest mean level of source credibility, while consumer endorsers generate the highest mean source similarity. The interaction of endorser type and message type significantly impacted ad believability and skepticism. Specifically, the endorser type factor had a significant impact on the dependent variables only in the testimonial ad condition, but not in the non-testimonial ad condition. The effects were mediated by source credibility.

While the focused results show celebrities may not be the strongest choice to endorse when using testimonials, the overall lack of main effect of testimonials lends to the possibility of a plateauing of effects with the various appeals used in DTC ads. DTCA has now been around for over 20 years, and this study lends to the possibility consumers are becoming unaffected by the various appeals used by pharmaceutical manufactures and only respond when a multitude of personally relevant factors are in place.

This paper seeks to explain the serial persistence as well as the substantial number of zeros characterizing global bilateral investment holdings. We explore the different sources of serial persistence in the data (unobserved country pair effects, genuine state dependence, and transitory shocks) and examine the crucial factors affecting the decision to invest in a host country.

Based on a gravity setup, we consider investment behavior at the extensive (participation) margin and employ dynamic first-order Markov probit models, controlling for unobserved cross-sectional heterogeneity and serial correlation in the transitory error component, in order to explore the sources of persistence. Within this modeling framework we explore the importance of institutional quality of the host country in attracting foreign investment.

The data support that the strong persistence is driven by true state dependence, implying that past investment experiences strongly impact on the trajectory of future investment holdings. Institutional quality appears to play a significant role to attract foreign investment.

The empirical findings suggest that due to the existence of genuine state dependence, inward-investment stimulating policy measures could have a more pronounced effect since they are likely to induce a permanent change to the future trajectory of inward investment.

Both the substantial number of zeros and the salient persistence characterizing bilateral investment holdings decision have been previously overlooked in the literature. A study modeling jointly the levels and the selection mechanism could prove a fruitful direction for future research.

The goal of this study is to investigate the relationships among brand attachment, online source credibility, and severity of negative online information on perceived negative change in brand evaluation and perceived brand risk.

A 2×2×2 experiment was conducted to explore the effects of brand attachment (low or high), online source credibility (low or high), and online information severity (low or high) on perceived negative change in brand evaluation and perceived brand risk.

The results showed that the severity of negative online information affects perceived negative change in brand evaluation and perceived brand risk significantly. However brand attachment can reduce the effects of negative online information on perceived negative change in brand evaluation and perceived brand risk significantly. The results also showed that the effect of the severity of negative online information on perceived negative change in brand evaluation and perceived brand risk is moderated by online source credibility.

In addition to the main effects in the proposed research model, it is the first study to explore the moderating effects of brand attachment and online source credibility on the relationship between negative online information and perceived negative change in brand evaluation and perceived brand risk.

This paper aims to determine factors that influence people living with HIV (PLHIV) to engage in internet-based HIV information seeking behaviour in selected Tanzanian public regional hospitals.

The authors conducted a questionnaire-based survey to 221 PLHIV in two regional public hospitals in Mwanza and Dar es Salaam, Tanzania. They assessed the validity and reliability of the measurement model by using exploratory factor analysis and also used hierarchical regressions to examine the research hypotheses by using Statistical Package for Social Science.

The study found that there is low usage of internet (24.3 per cent) to search online HIV information. Factors related to attitude and information source accessibility predicted usage intentions of internet, while facilitating conditions, information source accessibility and usage intention of internet determined actual use of internet among PLHIV. Age moderated the effects of information source quality and social influence on usage intention of internet, and the effects of the information source accessibility and social influence on actual use of internet. The findings imply that younger PLHIV were more likely to use internet to access HIV information than the older respondents due to perceived ease of accessing information and quality of the online content. Further, older PLHIV were more influenced by the views of others when making decisions to use internet.

Health-care providers and libraries need to conduct regular studies on health needs of patients, and promote benefits of accessing online information; website designers need to design user-friendly databases; public libraries need to include a section on health information; hospital and public librarians need to provide catalogues of health information resources on their websites; and health-care providers need to improve technological infrastructure.

This is a comprehensive study that provides empirical findings to better understand the HIV information seeking behaviour from actual internet users, particularly factors that may influence PLHIV to seek online information in Tanzania.

The purpose of this paper is to examine the causal relationship between interactive and personal campaigning on social media and political involvement, and the mechanisms that explain the effects. Specifically, this study examines whether personal and interactive communication on Twitter increases political involvement among citizens through social presence and perceived expertise.

An experimental design – a 2 (low vs high interactivity)×3 (depersonalized vs individualized vs privatized communication) between-subjects design – is used.

The findings show that interactive communication leads to a stronger sense of social presence and source expertise, which positively affect involvement. The effects of personal campaigning differ. Individualized communication positively affects involvement via source expertise. Interestingly, privatized communication positively affects involvement via social presence, but negatively via source expertise.

Although a growing body of work examines the political consequences of social media, there is still very little understanding why social media affect citizens. The current study fills this void by investigating how the use of social media affects political involvement among citizens.

The purpose of this paper is to examine the way the message source and presence of positive social cues influence the evaluations (attitude toward the corporate social responsibility (CSR) message and company, and word-of-mouth intention to support the campaign) of the decreased use CSR messages on Facebook.

In the context of Facebook, this study adopted 2 (message source: a CSR message in a sponsored ad format vs a CSR message posted by another Facebook user) × 2 (social cue: highly salient, positive social cues vs no social cues) factorial experimental design.

The main effects of message source types and presence of positive social cues on decreased usage CSR campaigns proved to be effective in generating better consumer responses to the company and campaign.

The findings are expected to advance the CSR literature by offering a detailed understanding of CSR campaigns that discourage consumption of the company’s own product to support a social cause. It is suggested to test the effects with other CSR examples to increase the ability to generalize the results further.

The results suggest campaign strategies on social media for public relations practitioners and corporate managers who work for companies conducting social responsibility campaigns that discourage consumption of their own products.

This study contributes to the CSR literature by examining the concept of CSR campaigns that advocate decreased usage, which has received scant scholarly attention to date.

The purpose of this paper is to investigate how the source of brand-related user-generated content (UGC) (a close friend vs a celebrity) interacts with content sponsorship (organic UGC vs sponsored UGC) to influence consumer causal attributions, brand attitude, and intention to comply with the recommendation.

In all, 285 college students participated in a two (source: a close friend vs a celebrity) by two (content sponsorship: organic vs sponsored) between-subjects online experimental design.

Results showed that recommendation from a close friend generated more information-sharing attributions and less monetary-gain attributions than did recommendation from a celebrity when the brand-related UGC was organic. In contrast, source type did not influence causal attributions differently when the UGC was sponsored. Further, this study demonstrated that both information-sharing and monetary-gain attributions mediated the effects of source type and content sponsorship on brand attitude and intention to comply with the recommendation.

This study is one of the first to examine the effectiveness of celebrities as a source of brand-related UGC. Also, this research extends the existing knowledge about source effects by examining the relative effectiveness of two sources of product information, close friends and celebrities, who have both been found to be individually effective in the traditional marketing context. Additionally, the findings of this study that the relative effectiveness of source type depends on whether brand-related UGC is sponsored or not add a further insight into how source type influences the effectiveness of brand-related UGC.