The more others care,the more you share? – Social contagion as a stardom trigger of social media superstars –

Emerging superstars on social media platforms reshape the media landscape. This research analyses social contagion as a stardom trigger of social media superstars (SMS). We argue that in addition to serving as a quality indicator, the number of observed consumers of SMS performances also indicates the suitability of discussing the SMS performances with others. We experimentally manipulated the number of previous views of a YouTube video and find that a high number of previous views significantly increases the perceived quality and the video’s discussion suitability even when holding all objective video characteristics constant. We discuss implications for aspiring SMS and (online) marketers.     

社会资本视角下开放式创新平台用户行为研究

近年来，随着用户创新的不断发展，开放式创新平台越来越多地被企业用于收集用户创意。但目前，国内开放式创新平台实施状况并不理想，相关领域研究也存在空白。以美创平台为例，借助社会资本理论，采用社交网络分析方法对美创平台现有数据进行分析，挖掘平台认知性资本和结构性资本，并根据不同用户在交互过程中展现的特征（发布的创意数、对其他用户的评论数以及收到的评论数）对其进行分类。根据研究结果，将美创平台所有用户分成6类，并对美创平台提出相关建议，包括用户激励措施及管理策略。最后，对未来用户互动动机方面的研究进行了展望。     

Have economic educators embraced social media as a teaching tool?

In this article, the authors discuss the results of a study of the perceptions of a national sample of economics faculty members from various institutions regarding the use of social media as a teaching tool in and out of the economics classroom. In the past few years, social media has become globally popular, and its use is ubiquitous among students. As such, some instructors have incorporated social media into their courses to engage students. Others are reluctant to embrace social media, citing privacy concerns, social media being more of a distraction than a useful tool, and the challenge of keeping up with social media developments, among others. The authors characterize economics faculty's perceptions of the use of social media platforms for economic instruction.     

Citibank; Citibank,Nader and The Facts

This paper aims to understand how Internet users may improve their social capital by investing in online social activities. We argue that the Internet can be a convenient and efficient means of maintaining existing social ties and/or of creating new ties. We seek to identify the determinants of online investments in social capital and the nature of the interaction with traditional forms of investment in social capital. Using a Luxembourg household survey, the econometric results reveal a significant positive impact of volunteer activities and trust (two measures of social capital) on online investments to maintain social capital, but more ambiguous results are found between online investments and face-to-face contacts with friends. By contrast, online investments to create new ties are poorly related to the Internet users' existing social capital, but depend on the opportunity cost of time.     

Online networks,social interaction and segregation: an evolutionary approach

There is growing evidence that face-to-face interaction is declining in many countries, exacerbating the phenomenon of social isolation. On the other hand, social interaction through online networking sites is steeply rising. To analyze these societal dynamics, we have built an evolutionary game model in which agents can choose between three strategies of social participation: 1) interaction via both online social networks and face-to-face encounters; 2) interaction by exclusive means of face-to-face encounters; 3) opting out from both forms of participation in pursuit of social isolation. We illustrate the dynamics of interaction among these three types of agent that the model predicts, in light of the empirical evidence provided by previous literature. We then assess their welfare implications. We show that when online interaction is less gratifying than offline encounters, the dynamics of agents’ rational choices of interaction will lead to the extinction of the sub-population of online networks users, thereby making Facebook and similar platforms disappear in the long run. Furthermore, we show that the higher the propensity for discrimination of those who interact via online social networks and via face-to-face encounters (i.e., their preference for the interaction with agents of their same type), the greater the probability will be that they all will end up choosing social isolation in the long run, making society fall into a “social poverty trap”.     

Banned from the sharing economy: an agent-based model of a peer-to-peer marketplace for consumer goods and services

The emergence of profit-based online platforms related to the Sharing Economy, such as BlaBlaCar and Airbnb, provides new means for end users to create an income from their possessions. With this opportunity, participants have to make strategic economic decisions despite limited formal expertise and information. Decentralization (using digital technologies) and reputation (using user reviews) are the core mechanisms chosen by these platforms to mitigate these limitations and to work efficiently as online matchmakers. We test the performance of these two mechanisms by studying the allocative efficiency (in terms of value and volume of transactions) of simulated marketplaces under different types of motivation from the participants and control from the platforms. As a result, we find an inverted-U relationship between the decision-making leeway available to the participants and the platform’s allocative efficiency. From the participants’ perspectives, too much freedom or too many barriers lead to market failures affecting specific participants: low-end consumers are banned from the marketplace while high-end providers experience lower levels of activity. As governance advice for these platforms, we show the limitations of promoting these platforms on the sole motive of monetary rewards.     

Media use and life satisfaction: the moderating role of social events

This study investigates whether and how social events, which have specific impact levels and consequences, influence the relationships between the use of different types of media and media users’ life satisfaction. The impact levels refer to the number of impact factors, which characterize social events (relevance, non-polarization, certainty, radicalness and proximity). The consequences, in turn, refer to the outcomes for media users (positive or negative outcomes). The results are based on data from the Standard Eurobarometer survey (N = 73,860) as well as on data from a content analysis and cover 36 social events in 13 European countries over a time period of 6 years. The moderated moderation analysis reveals that social events only influence the effects of the use of more interactive media types (the internet and social network sites) on media users’ life satisfaction, but they don’t influence the effects of the use of less interactive media types (written press, radio and TV) on media users’ life satisfaction. In fact, social events with positive consequences increase these effects, while social events with negative consequences buffer these effects. Previous research has investigated how the use of different types of media or specific social events affect people’s life satisfaction. This study contributes to the literature by revealing how social events and media use interact and thereby influence media users’ life satisfaction.     

社会网络联系与用户创新研究

传统社会网络理论认为,创新用户间的社会网络联系有利于提升用户创新绩效,但在考虑社会网络成本前提下,不同质量水平的社会网络联系对用户创新绩效具有不同影响。选取乐高开放式创新平台为典型案例,编写爬虫程序获取平台客观数据,通过构建创新用户社会网络,实证检验高质量和低质量社会网络联系对用户创新的异质性影响。结果发现,创新用户拥有的社会网络联系总数对用户创新绩效无显著影响,社会网络联系质量才是影响用户创新绩效的关键。其中,高质量联系能够显著提升用户创新产出价值,并显著减少创意项目淘汰概率;而低质量联系则会显著降低用户创新产出价值,且微弱提高创意项目淘汰概率。以此为基础,为创新用户和开放式创新平台方提出策略性建议。     

Does Twitter chatter matter? Online reviews and box office revenues

ABSTRACT

With a rapid rise of text-based social media and online Word-of-Mouth (WOM) activity, millions of people express their thoughts and opinions on a variety of topics. Considering that nowadays WOM is a most influential source of information when guiding consumers’ choice and purchase decisions, in this paper we look at the relationship between Twitter messages (tweets) and cinema box office revenues. Using static and dynamic panel data regression approaches, we show that the frequency, sentiment and timing of tweets posted about a film are correlated to different extent with the movie’s box office revenues, with negative tweets being particularly damaging to the box office revenues. From a managerial perspective, this is important to know, such that film production companies and distributors can adjust their strategy accordingly.     

Investment in identity in the field-Nudging refugees’ integration effort

Social identity greatly affects behavior. However, less is known about an individual’s investment in identification, i.e., in belonging to a social group. Using a language-learning platform utilized by refugees to learn the host country’s language, we design a field experiment that allows us to make effort as an investment in a new group identity salient. The social identity in our treatment is a refugee’s identification with the host society. We modified a mailing to 5600 refugees who use an online language-learning platform to learn the host country’s language. These treatment emails make salient that improving the host country’s language ability increases the belonging to the host society. Our analysis reveals that the treatment has a significant positive effect on the effort exerted on the language-learning platform, leading to more completed exercises and more time spent learning the host country’s language. This suggests that refugees invest in becoming part of the host country’s society for its social identity component. Our findings can inform policy considerations on the use of nudges for other integration measures intended for refugees and immigrants in general.     

社会资本与技术支持对学术虚拟社区知识共享的影响——基于科学网平台的知识共享要素分析

学术虚拟社区是广大学者和科研工作者进行知识交流与探讨的重要平台，也是学术碰撞和知识创新的新阵地。通过构建社会资本与技术支持对用户知识共享行为影响的理论模型，探讨社会资本（关系资本、结构资本、认知资本）和技术支持（感知有用性、感知易用性）对社区用户知识共享行为（知识共享质量和数量）的作用机理。结果表明，关系资本与结构资本分别对学术虚拟社区知识共享质量和数量具有显著正向影响，属于持续动力。伴随其它因素介入，认知资本对学术社区知识共享数量产生正向影响，技术支持对知识共享的影响具有显著差异，感知易用性对学术社区知识共享质量和数量均具有显著正向影响，而感知有用性对知识共享质量具有显著负向影响。基于此，提出社区管理者应采取措施拓展用户社会资本并加强平台技术支持，以实现学术虚拟社区可持续发展。     

Digital identity: How users value the attributes of online identifiers

This paper examines online identifiers from an economic perspective. It uses conjoint analysis survey techniques to develop empirical data on how users value the attributes of online identifiers. It is concerned in particular with three issues: (1) the degree to which identified subjects value increasing the scope of an identifier, i.e., the ability to use a single identifier to access services offered by several organizations; (2) the degree to which users’ choice may be constrained by switching costs; and (3) the value individuals place on privacy and data security relative to other attributes such as cost or scope. The survey population was located in South Korea. The results indicate that e-mail addresses dominate the world of online identifiers for ordinary consumers; that consumers highly value increased scope (e.g., single sign-on capabilities) and the security of their private data; and that switching costs are high.     

CRIME AND EDUCATION IN A MODEL OF INFORMATION TRANSMISSION

We model the decisions of young individuals to stay in school or drop out and engage in criminal activities. We build on the literature on human capital and crime engagement and use the framework of Banerjee (1993) that assumes that the information needed to engage in crime arrives in the form of a rumour and that individuals update their beliefs about the profitability of crime relative to education. These assumptions allow us to study the effect of social interactions on crime. In our model, we investigate informational spillovers from the actions of talented students to less talented students. We show that policies that decrease the cost of education for talented students may increase the vulnerability of less talented students to crime. The effect is exacerbated when students do not fully understand the underlying learning dynamics.     

Can price discrimination improve the performance of online retail platforms?

Online retail platforms are the core of online retail activities, but due to increased competition among the platforms, traditional sources of revenue such as the membership and transaction fees alone cannot guarantee platform profitability. Thus, platform enterprises are looking for other sources of revenue. In this article, we focus on the role of value-added services fees charged by platforms. Specifically, we show that price discrimination exercised by platform enterprises in value-added services fees can increase the user access scale, platform profit as well as the social welfare.     

基于社会认知理论的虚拟社区成员知识共享行为实证研究

在已有文献的基础上,基于社会认知理论,建立了虚拟社区成员知识共享行为理论模型,并提出了假设。通过设计关于虚拟社区成员知识共享行为的调查问卷,利用统计软件SPSS 17。0和结构方程模型统计软件Amos 17。0对收集到的数据进行量化分析。实证结果表明：社区氛围互惠、公平和创新与知识共享行为、自我效能和结果预期有显著的正相关关系;自我效能与结果预期、知识共享行为有显著的正相关关系;结果预期与知识共享行为没有显著的正相关关系。     

Privacy and security concerns in online health services

There is a growing interest in Internet privacy and security concerns. This article investigates Internet privacy and security concerns to determine whether such concerns hinder online health service use under different policies that enhance privacy and security protection. Empirical findings show a negative association between online privacy and security concerns and the use of online health services. Regulations enhancing customers’ privacy and security moderate the negative relation.     

Tax evasion and tax morale: A social network analysis

We study the effects of tax morale and social norms on tax evasion when individuals interact in a network. We present a model that incorporates incentives for tax compliance in the form of punishment and fines, tax morale, and reputation for social behaviour. We assume that individuals adjust their tax morale by observing the neighbours' tax morale. We simulate the model for different values of the parameters and show that the steady-state share of taxpayers as opposed to tax-evaders is affected by the probability of finding like-minded peers in the reference group (network integration), the weight that individuals attribute to reputation, and the share of individuals who update their tax morale. Last, we consider the possibility of a fiscal authority using the knowledge of the network structure and targeting ‘central’ individuals. We show that by positively affecting the tax morale of individuals whose influence within the network is high, a fiscal authority can increase tax compliance.     

MODELLING SOCIAL ENTERPRISES

The majority of research concentrates exclusively on the objectives of governments, profit entities or non‐profit organizations, while a significant number of organizations are hybrids. One form of these hybrids is the social enterprise. This paper theoretically describes social enterprises taking into consideration their main aims. Based on the ‘earned income’ school of thought, the principal‐agent theory and considering the nature of social enterprises’ activities we propose the objective functions of their owners (principals) and managers (agents). The maximization problem of the social enterprise is defined as the weighted average of the utilities of two groups of stakeholders who have an influence on the degree of the realization of the social mission and business orientations. We point out the direction which social enterprises should follow in order to obtain the highest value of their objective functions. The desired state for social enterprises should be one in which they reinvest all surpluses in the process of their mission realization and their profit is slightly higher than the required level by the principal's contract.     

Social cooperatives,social welfare associations and social networks

We use an original data-set to study how participation in two types of non-profit organizations – i.e. social welfare associations and social cooperatives – affects individual social capital, understood as a network of cooperative relationships. Participation in both the types of organization allows members to start new social relations. However, social welfare associations seem to play a significantly greater role in the development of volunteers’ social capital, favouring the creation of weak ties that are used to exchange information and advice, and offering the opportunity to establish stronger ties entailing concrete mutual support. Within social cooperatives, workers appear to develop their individual social capital to a greater extent than volunteers. Our results suggest that the composition of the workforce, the depth of members’ involvement in the organization’s activities and the human resources strategies adopted by the management influence the creation of cooperative relations through on-the-job interactions.     

How users’ Internet experience affects the adoption of mobile payment: a mediation model

Mobile payment becomes a convenient way to complete transactions due to the increasing popularity of mobile devices and the maturity of related technologies. Users’ experience of using computers and the Internet in financial activities largely affects their intention to use mobile payment. Combining the Technology Acceptance Model and Innovation Diffusion Theory, we examined the mediating effect of five factors, that is, perceived usefulness, perceived ease of use, compatibility, risk, and privacy concern, in the relationship between Internet experience and the adoption of mobile payment. Data from 922 mobile users supported the partial mediating effects of the five factors.