We collect more than eight million German-language tweets on the war in Ukraine and use a machine learning approach toconstruct a daily index of uncertainty about the war. In an empirical model, we show that fluctuations in uncertainty have strong effectson financial markets and real economic...

This study tests the impact of usage of Twitter as a microblogging service provider on shareholders’ returns and abnormal returns. In accordance with this purpose, two portfolios were created based on measurement of whether firms had a Twitter account and, if so, their number of followers and...

This study tests the impact of usage of Twitter as a microblogging service provider on shareholders' returns and abnormal returns. In accordance with this purpose, two portfolios were created based on measurement of whether firms had a Twitter account and, if so, their number of followers and...

Presidential elections can impact world peace, global economics, and overall well-being. Recent news indicates that fraud on the Web has played a substantial role in elections, particularly in developing countries in South America and the public discourse, in general. To protect the...

Presidential elections can impact world peace, global economics, and overall well-being. Recent news indicates that fraud on the Web has played a substantial role in elections, particularly in developing countries in South America and the public discourse, in general. To protect the...

We leverage a temporary block of the Chinese microblogging platform Sina Weibo due to political events, to estimate the causal effect of online word-of-mouth content on product demand in the context of TV show viewership. Based on this source of exogenous variation, we estimate an elasticity of...

This study seeks to further the research on online language learning by examining the level at which intermediate ESL students understand and process sociopragmatic information in their second language (L2) in globally networked environments like Twitter. In this semester-long study, L2 English...

Purpose Since its launch in 2007, research has been carried out on the popular social networking website Tumblr. The purpose of this paper is to identify published Tumblr-based research, classify it to understand approaches and methods, and provide methodological recommendations for others....

Purpose Celebrity endorsement on microblogging platforms (such as Twitter or Weibo) has become a widely adopted marketing practice. Compared to its counterpart on traditional mass media, celebrity endorsement on microblogging platforms has some unique characteristics. For example, the...

Initial adoption of technology is examined. Initial adoption refers to the point at which the decision to adopt a technology is made, before the user has formed perceptions of - for instance - how easy it is to use or how useful it is. Adoption behaviour is explained in terms of information...

Despite the perception that face-to-face classrooms provide speaking opportunities, studies by , , and have conveyed that there is limited interaction in a traditional college lecture setting. Social media networks such as Twitter provide an opportunity for instructors to utilize popular mobile...

Purpose – Since its introduction in 2006, messages posted to the microblogging system Twitter have provided a rich dataset for researchers, leading to the publication of over a thousand academic papers. This paper aims to identify this published work and to classify it in order to understand...

Purpose – Despite rapid growth in organizational use of Twitter, there is little theoretical or empirical research examining how different organisations use Twitter. This paper aims to analyse and compare use of Twitter in 12 accounts held by six organisations in the USA and Australia, drawing...