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Opinion leader recommendations (OL’ eWOM) and Online Consumer Reviews (OCR) are the two most important ways to know about new brands on the Internet. This research analyzed which source provides more credible information: OL' eWOM or OCR. A sample of 146 university students was randomly divided into three groups (OL, OCR, Control Group) in an online experiment field. A Nonparametric Analysis of Variance (N par Test) with the Omnibus Kruskal-Wallis Test was conducted between groups with OL' eWOM, OCR, and CG. The results evidenced that OCRs are a more useful source of information than OL’ eWOM and when the consumer shopping experience was included, this influence is even stronger. As more online shopping experience a consumer has, the less they are influenced by OLs. JEL classification: M31; M37. Resumen Las recomendaciones de líderes de opinión (OL' eWOM) y las reseñas de consumidores en línea (OCR) son las dos formas más importantes de conocer nuevas marcas en Internet. Esta investigación analizó qué fuente proporciona información más creíble: OL' eWOM u OCR. Una muestra de 146 estudiantes universitarios se dividió aleatoriamente en tres grupos (OL, OCR, Grupo de control) en un experimento en línea. Los datos fueron analizados con un Análisis no Paramétrico de Varianza con prueba Omnibus Kruskal- Wallis entre grupos. Los resultados evidenciaron que los OCR son una fuente de información más útil que OL' eWOM, y cuando se incluyó la experiencia de compra del consumidor, esta influencia es aún más fuerte. Los consumidores con menos experiencia de compra online pueden verse influenciados por las OL' eWOM. Resumo As recomendações de líderes de opinião (OL' eWOM) e as Online Consumer Reviews (OCR) são as duas formas mais importantes para conhecer as novas marcas na Internet. Esta pesquisa analisou qual fonte fornece informações mais confiáveis: OL' eWOM ou OCR. Uma amostra de 146 estudantes universitários foi dividida aleatoriamente em três grupos (OL, OCR, Grupo de controle) em um experimento online. Os dados foram analisados com uma Análise de variância não paramétrica com o teste Omnibus Kruskal- Wallis entre grupos. Os resultados demonstraram que os OCR são uma fonte de informação mais útil do que OL' eWOM, e quando a experiência de compra do consumidor foi incluída, esta influência é ainda mais forte. Os consumidores com menos experiência em compras online podem ser influenciados pelas OL' eWOM.

Carbohydrate responsive element-binding protein (ChREBP) has been identified as a primary transcription factor that maintains energy homeostasis through transcriptional regulation of glycolytic, lipogenic, and gluconeogenic enzymes in response to a high-carbohydrate diet. Amino acids are important substrates for gluconeogenesis, but nevertheless, knowledge is lacking about whether this transcription factor regulates genes involved in the transport or use of these metabolites. Here, we demonstrate that ChREBP represses the expression of the amino acid transporter sodium-coupled neutral amino acid transporter 2 (SNAT2) in response to a high-sucrose diet in rats by binding to a carbohydrate response element (ChoRE) site located -160 bp upstream of the transcriptional start site in the SNAT2 promoter region. Additionally, immunoprecipitation assays revealed that ChREBP and silencing mediator of retinoic acid and thyroid hormone receptor (SMRT) interact with each other, as part of the complex that repress SNAT2 expression. The interaction between these proteins was confirmed by an in vivo chromatin immunoprecipitation assay. These findings suggest that glucogenic amino acid uptake by the liver is controlled by ChREBP through the repression of SNAT2 expression in rats consuming a high-carbohydrate diet.

Opinion leaders and eWOM are becoming two of the most effective ways to launch a brand on social media by creating viral marketing. However, how much influence does an opinion leader&rsquo, s eWOM (OL eWOM) have on consumer purchasing decisions? This research looks at the role of OL eWOM as well as the effect of its valence and product type on the decision to buy or not buy from a realistic experimental online store design. In total, 300 undergraduate students were randomly assigned to one of five scenarios in a 22 experimental arrangement. Results show that OL eWOM influences consumer online decisions when purchasing experience-type goods and the valence of eWOM is positive. However, if we compare the OL eWOM with a control group, then OL eWOM does not have a significant influence. This research provides novel empirical evidence for the limited influence of OL in modeling shopping behaviors in e-commerce contexts.

Consumption can be more than just a necessity; it can become a leisure activity. With the emergence of e-commerce and social media, products and services are just one click away; a trend that is further driven by gamified systems. This research aims to systematically analyze the most relevant academic literature on gamification, to establish if it influences online consumer decisions and, if so, which elements, mechanisms, and theories can explain it. After a thorough search from Web of Science and Scopus databases using SciMAT, 257 papers were analyzed. Twenty-nine (29) of the 36 papers found show empirical evidence that the inclusion of game elements in non-game activities has a significant influence on consumer engagement and online consumer decisions in digital contexts. Moreover, rewards and challenges were identified as the two most used mechanisms, with points, badges, and leaderboards being the most tested gamification elements. The Self-Determination Theory (SDT) and the Technology Acceptance Model (TAM) are the two most common theoretical explanations for why gamification works. Lastly, possible future studies to include thematic, methodological and theoretical agendas were discussed.