Central features of today's electronic communications markets are complementarities between the different layers of the value chain, substitutability between some applications, network effects in the provision of content and services, two-sided business models that partly involve indirect...

We analyze the treatment and impact of idiosyncratic or firm-specific risk in regulation. Regulatory authorities regularly ignore firm-specific characteristics, such as size or asset ages, implying different risk exposure in incentive regulation. In contrast, it is common to apply only a single...

In this paper, we analyze the investment and divestment patterns of different types of venture capitalists. Using a data set em- bracing all venture-backed IPOs that occurred on Germany's Neuer Markt we investigate whether the governance structures, objectives, abilities and track records of...

Using a unique, hand-collected database of all venture- backed firms listed on Germany's Neuer Markt, we analyze the history of venture capital financing of these firms before the IPO and the behavior of venture capitalists at the IPO. We can detect significant differences in the behavior and...

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...

Ownership unbundling and third party access are discussed as two options of unbundling in both the literature and political discussions. Focusing on the South American electricity sector, I contrast static and dynamic impacts of ownership unbundling and third party access regimes on customer...

The German response to the Fukushima nuclear power plant incident was possibly the most significant change of policy towards nuclear power outside Japan, leading to a sudden and very significant shift in the underlying power generation structure in Germany. This provides a very useful natural...