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Evolution and stationarity are key time series empirical concepts which need theoretical assessment by extant research. This study presents a model to explain brand sales dynamics in emerging markets using two dimensions: sales behavior in time (stationary or evolution) and final position (negative, neutral or positive).

A three-step methodological approach was performed. First, individual brand sales series were classified (stationarity or evolution) after unit root tests. These series were then regressed against a time variable. These two steps enabled a qualitative classification of six proposed positions, ranging from the worst to the best scenario for marketing managers. A final multinomial model identified the marketing effect to these positions.

Descriptive statistics reveal an insignificant prevalence of stationary sales series and a small number of positive brand sales series (ascending or promising). The multinomial model shows that price is negatively associated to positive brand sales positions, the important effect of service strategies and how product decisions can lead to an avoidance of negative positions.

The model is limited to short time series of a unique transactional dataset from a multinational energy company based in Brazil.

The research provides a rational empirical framework to managers involved with decisions regarding brand sales dynamics in emerging markets.

The approach advance into the development of models to uncover conditions for market evolution and stationarity in a context marked by the shortage of data.

The purpose of this paper is to measure the impact of post type (advertising, fan, events, information, and promotion) on two interaction metrics: likes and comments. The measuring involved two popular social media, Facebook and Instagram, and in business profiles of five different segments (food, hairdressing, ladies’ footwear, body design, fashion gym wear).

The method used was multiple regression analysis with an estimator of the ordinary least squares for 1,849 posts from five different companies posted on Facebook (680 posts) and Instagram (1,169 Instagram) over an eight-month posting period. Regression analysis was used to identify the relationship between the dependent variables (likes and comments), and the independent variables (post typology, segments, week period, month, characters and hashtag).

It was seen that the post types events and promotion led to a greater involvement of followers in Instagram, in particular. In Facebook, the events post type was only significant in the like’s interaction. Another finding of the research is the relevance of the food and body design segment which was significant in both virtual social media. This indicates a user preference involving their day-to-day lives, in this case, having a tattoo done or seeing a photo of a dessert.

With the findings of this study, academics and social media managers can improve the return indicators of interactions in posts and broaden the discussion on the types of post and interaction in different virtual social media.

The nature of digital media channels are important factors in explaining consumers’ behavior over the Web, and specifically on social network sites (SNS). The purpose of this paper is to propose a conceptual framework explaining consumer engagement with electronic word of mouth (eWOM) communication via SNS, based on key attributes of this media channel.

Based on the expectancy value theory (EVT), a conceptual framework is proposed to model the effect of eWOM channel attributes on eWOM engagement process. Consumer eWOM engagement is conceptualized as a second-order construct. A structural equation modeling procedure was employed to empirically test the model using data collected from two social media communication channels.

First, results suggest that engagement with eWOM can be conceptualized as a second-order construct based on user tendency to receive or share eWOM with other network members. Second, the path analysis model supports the employment of EVT and shows that two key attributes of eWOM channels, social capital and credibility, significantly affect consumer attitude toward eWOM via SNS. Attitude toward eWOM, in turn, affects eWOM engagement. Third, SNS channel type moderates the effect on attitude.

Marketing communication practitioners should note that the strength of social ties plays a key role in spreading eWOM on SNS effectively. This insight should be employed a part of social media marketing strategy.

This is first research that models the effect of social media attributes on eWOM engagement and demonstrates the moderating role of channel type. The model is highly valuable in light of the importance of the concept of engagement in internet research.