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In ihrem Werk \"Outline of Linguistic Analysis\" schreiben die Linguisten Bloch und Trager: \"Eine Sprache ist ein System willkürlicher Lautsymbole, mit deren Hilfe eine soziale Gruppe gemeinsam handelt.\" Robert A. Hall vertritt in seinem \"Essay on Language\" die Ansicht, Sprache sei \"die Institution, mit deren Hilfe Menschen miteinander kommunizieren und unter Verwendung gewohnheitsmäßig benutzter, oral-auditiver, willkürlicher Symbole in Interaktion treten. Internetquellen I. http://blog.pasch-net.de/jugendkurse/archives/3107-Ein-Brief-an-einen-deutschenFreund.html. Zugriff am 29.09.2016 II. http://www.qualitative-research.net/index.php/fqs/article/view/2064/3584.

We develop and estimate a dynamic structural framework to analyze the social-media content creation and consumption behavior of employees within an enterprise. We focus, in particular, on employees’ blogging behavior. The model incorporates two key features that are ubiquitous in blogging forums: users face (1) a trade-off between blog posting and blog reading; and (2) a trade-off between work-related and leisure-related content. We apply the model to a unique data set comprising the complete details of the blog posting and reading behavior of employees over a 15-month period at a Fortune 1000 IT services and consulting firm. Despite getting a higher utility from work-related blogging, employees nevertheless publish a significant number of leisure posts. This is partially because the creation of leisure posts has a significant positive spillover effect on the readership of work posts. Counterfactual experiments demonstrate that leisure-related blogging has positive spillovers for work-related blogging, and hence a policy of abolishing leisure-related content creation can inadvertently have adverse consequences on work-related content creation in an enterprise setting. When organizations restrict leisure blogging, the sharing of online work-related knowledge decreases and this in turn can also reduce employee performance rating. Overall, blogging within enterprises by employees during their work day can have positive long-term benefits for organizations. This paper was accepted by Lorin Hitt, information systems .

Opinion mining of microblog messages has become a popular application of business analytics in recent times. Opinions reflected in microblogs have provided businesses with great opportunities to acquire insights into their operating environments in real time. In particular, the relationship between microblog sentiment and stock returns is of great interest to investment professionals and academic researchers across multiple disciplines. We empirically test this complex relationship in a comprehensive study. We perform vector autoregression on a data set containing close to 18 million microblog messages spanning 4 years at the market and the individual stock levels, and at the daily and the hourly frequencies. The results show that the influence of microblog sentiment on stock returns is both statistically and economically significant at the hour level. Microblog sentiment is also largely driven by movements in the market. Moreover, stock returns have a stronger influence on negative sentiment than on positive sentiment. These findings have important implications for both research and practice.