I quantify spillovers of attention in a network of content pages, which is challenging, because such networks form endogenously. I exploit exogenous variation in the article network of German Wikipedia to circumvent this problem. Wikipedia prominently advertises one featured article on its main...

Peer influence through word-of-mouth (WOM) plays an important role in many information systems but identification of causal effects is challenging. We identify causal WOM effects in the empirical setting of game adoption in a social network for gamers by exploiting differences in individuals'...

Endogeneity in network formation hinders the identification of the role social networks play in generating spillovers, peer effects and other externalities. This paper tackles this problem and investigates how the link network between articles on the German Wikipedia influences the attention and...

We develop a model of R&D competition between an incumbent and a potential entrant with network externalities and durable goods. We show that the threat of entry eliminates the commitment problem that an incumbent may face in its R&D decision due to the goods? durability. Moreover, a potential...

This paper analyzes the impact of network externalities on R&D competition between an incumbent and a potential entrant. The analysis shows that the incumbent always invests more than the entrant in the development of higher quality network goods. However, the incumbent exhibits a too low level...

This paper studies the incentives to undertake uncertain R&D initiatives in a dynamic duopoly network industry. It is shown that network externalities positively affect the incentives to invest in R&D. In the model, competition resembles a preemption race and, therefore, market performance...

Much of the empirical literature analysing the relation between environmental innovation and competitiveness has focused on the question whether 'it pays to be green'. We differentiate between different types of environmental innovations, which will be disentangled in those aiming at reducing...

Globalization has provided many companies with new opportunities for growth and efficiency. This requires them to operate successfully across cultural and social borders. These can be stumbling blocks to internationalization and have been found to cause frequent errors and delays for...

Die Zusammenführung von Forschungs- und Entwicklungsbereichen als Folge einer Fusion oder Akquisition erfordert in der Regel ein umfassendes Integrationsprojekt, um die Innovationsfähigkeit des Unternehmens auch in Zukunft sicherzustellen. Auf Basis eines konzeptionellen Bezugsrahmens erfolgt...

The combination of research and development units following a merger or an acquisition usually requires a broad and widespread integration project to ensure that a company?s innovative capabilities are carried forward into the future. Previous research has shown, however, that the combined...