In the past years we have observed enormous adoption and use of digital technologies in almost all domains of human life. In this context, researchers and practitioners have been using the term “digital transformation” (DT) to characterize phenomena related to the changes caused by increased...

This paper presents first results from research into open source projects from a software engineering perspective. The research methodology employed relies on public data retrieved from the CVS-repository of the GNOME project and relevant discussion groups.(...)

Referenzmodelle sind ein zentraler Untersuchungsgegenstand der Wirtschaftsinformatik. Ihre Entwicklung ist nicht nur wissenschaftlich reizvoll, sie stellen gleichzeitig eine wirksame Unterstützung der Praxis in Aussicht. Diesen Verheißungen zum Trotz verlief die Entwicklung und - vor allem -...

Referenzmodelle sind ein zentraler Untersuchungsgegenstand der Wirtschaftsinformatik. Ihre Entwicklung ist nicht nur wissenschaftlich reizvoll, sie stellen gleichzeitig eine wirksame Unterstützung der Praxis in Aussicht. Diesen Verheißungen zum Trotz verlief die Entwicklung und - vor allem -...

In this paper we will discuss the organization of work which is found to be present in open source projects, and the implications for the expended effort as well as achieved efficiency. The paper is based on several empirical analyses of open source communities. The main method employed is...

This paper serves two purposes. First, we introduce a new data set on the German stock market which is publicly available to all researchers. It comprises factor returns (a market factor, a size factor, a book-to-market factor, and a momentum factor) as well as returns of portfolios which are...

This paper examines the impact of illiquidity on equity returns on the German stock market. Since illiquidity has many facets, we cover the whole spectrum of illiquidity measures: trading speed, trading costs, trading quantity, and price impact. Based on these illiquidity measures we construct...

Although most of the empirical and theoretical asset pricing literature predicts a positive or no signi ficant relationship between idiosyncratic volatility and returns, Ang et al. (2006, 2009) find that high idiosyncratic volatility stocks have low returns and vice versa. We deliver further...