Measuring social influence for firm-level financial performance
Introduction
Social influence is defined as the change in an individual’s thoughts, feelings, attitudes, or behaviors that result from interactions with another individual or a group (Rashotte, 2007). Social influence is transmitted through social networks and has a strong impact on individual behavior (Amaldoss and Jain, 2015). For example, William Johnson, an editor at Big Eye Deers, reported that 81% of respondents indicated that posts from their friends and family directly influenced their purchase decisions (smallbiztrends.com/2014/10/influence-consumer-purchase-decisions.html). The social influence effect also occurs with social entities other than humans. For example, the performance of a firm is affected by its related companies. Michael Porter, a professor at Harvard Business School, and James Heppelmann, the president and CEO of the software company PTC, have said that connected products increasingly strengthen the relationships between companies, and, in such situations, the performance of one company can significantly affect other companies (hbr.org/2015/10/how-smart-connected-products-are-transforming-companies). Some supply chain studies have also demonstrated that a firm’s performance is strongly affected by companies it cooperates with (Cao and Zhang, 2011, Huo, 2012, Tan et al., 1998).
In past research, social influence has been demonstrated to have enormous impact on individual behavior, such as purchasing (Sridhar and Srinivasan, 2012, Wang et al., 2012) and decision-making (Baddeley and Parkinson, 2012, Zhou, 2011). For example, Lee et al. (2011) found that positive social influence reinforces the relationship between beliefs and attitudes toward online shopping, as well as the relationship between attitude and intention to shop. Kwon et al. (2014) investigated the influence of peer behavior on group formation in social network sites. In these studies, there was a focus on friendship networks in which the participants are people.
As web-based applications have evolved, public information has provided a great number of resources to discover the nature of relationships between entities, especially between products and companies. As opposed to humans, who have social intelligence and emotions, the social relations between such objective entities are virtual and stable. Thus, methods of measuring social influence on objective entities should be different from previous studies on friendship networks. Zhang et al., 2013a, Zhang et al., 2013b mined product networks based upon product reviews, and investigated the impact of network structures on product sales. To construct a company network, Ma et al. (Ma et al., 2011, Ma et al., 2009) focused on network links, and companies’ competitive relationships (supporting or opposing). The social influence of company networks has also been investigated in network structures (Creamer et al., 2013, Jin et al., 2012).
We focus on the company influence network, which includes network links (company relationships) and node attributes (company influence), and companies’ financial performance to investigate how to objectively measure social influences. We ask:
- (1)
How is the company influence network constructed?
- (2)
How can the social influence effect be measured in an objective entity network (OEN)?
- (3)
Does social influence affect a company’s financial performance?
We propose a novel method to construct the company influence network and measures of social influence. We use vector autoregression (VAR) in our simulation work. This method allows us to examine the immediate and lagged effects of social influence on a firm’s performance, and it accounts for biases such as endogeneity, autocorrelation and reverse causality (Luo et al., 2013). This method also captures the carry-over effects over time through generalized impulse response functions and facilitates the assessment of the relative contribution of the different variables through generalized forecast error variance decomposition (Pesaran and Shin, 1998).
This study contributes to the literature in several ways. First, we propose a general approach to measure social influence in an OEN. It works well in company networks to measure social influence and demonstrates predictive power for financial performance, which can also be studied in other OENs, such as product networks and financial institution networks. Second, we use a VAR model to handle time-series data and estimate correlations. This study extends existing prior research on static models. Third, our approach combines multiple data sources, including news and search indice, to measure social influence.
Section snippets
Social influence
Social influence has been extensively researched in Social Science (Lewis et al., 2012), Marketing and Information Systems (Jin et al., 2012). These studies have indicated the strong effects of social influence on an actor’s behavior (AB) (whether an actor will join a group, buy a product, behave in the same manner as their friends) and on an actor’s performance (AP) (a product’s sales, stock return, or risk). In Table 1, we summarize social influence research, which has mostly been related to
Data and measures
We now discuss the data that we used, and the measures that we employed for this research.
Empirical model for estimation
We used a VAR model to analyze the effects of time-varying interactions among firm influence, social influence and firm performance, by leveraging the analytical capabilities of impulse response functions and error term variance decomposition. Our empirical time-series analysis had several steps. First, we estimated the stationarity metrics using a unit root test. Second, we tested for causal relationships among the variables with a Granger causality test. Third, we estimated how the carry-over
Estimation results
We execute the VAR model for individual firms in the banking and real estate industries. Among the 31 firms studied, there are four firms (000046, 000656, 600340 and 600376) whose names are in the news less frequently, especially in an opposing and negative manner, so we could not use these data in the VAR model. The data are from a one-year period, and they include 238 stock trading days in 2013. There are a total of 27 firms evaluated; their stock codes are shown in the left column of Table 4.
Conclusion
This study proposed a research approach to measure social influence in an objecOEN, specifically a company network, and examined social influential effects on company financial performance. The main findings of this study are threefold: social influence measures (the number of peers and peer effects that were derived from public information) show a significant correlation with firm financial performance; a competitive relationship has higher predictive power for firm return and risk; and
Acknowledgment
This study was partly funded by National Natural Science Foundation of China (Nos. 71532004 and 71601090).
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