We investigate the impact of self-organized reputation versus certification by an independent institution on demand for online shops. Using data from a large Austrian price comparison site, we show that quality seals issued by a credible and independent institution increase demand more than...

This paper summarizes the peculiarities of online markets and discusses recent antitrust cases related to online markets. Following a brief description of the online markets' characteristics and potential tendencies for concentration the paper first discusses the antitrust allegations and...

Für die einen gilt: "Nur Warnhinweise auf Lebensmitteln können vor der Volksseuche Übergewicht noch retten." Für die anderen hingegen ist klar: "Eine rote Ampel auf kalorienreichen Lebensmitteln bedeutet eine unerträgliche Entmündigung der Bürger." Die aktuelle Kontroverse um die von der...

Since the launch of the iTunes Music Store in the US in 2003 and in much of Europe in the following years, music trade has shifted rapidly from physical to digital products, raising the availability of products in di erent countries. Despite substantial growth in availability, the available...

It is often assumed that consumers benefit from the internet because it offers a “long tail” with more variety of products to choose from. However, search costs may block the long tail effect and result in the dominance of superstars. This paper examines the variety hypothesis in the entire...

We investigate experimentally on eBay how sellers set prices in "Buy-It-Now" (BIN) auctions. We find that the eBay format leads to prices substantially below those expected in second-price auctions. Moreover, our results reveal that the information available on eBay about buyer experience and...

We study ethnic discrimination in the sharing economy using the example of Europe’s largest carpooling marketplace. Based on a unique dataset with more than 17,000 rides, we estimate the effects of drivers’ perceived name origins on the demand for rides. The results show sizable ethnic...

In Buy-It-Now (BIN, hereafter) auctions, sellers can make a \"take-it-or-leave-it\" price offer (BIN price) prior to an auction. We analyse experimentally how eBay sellers set BIN prices and whether they benefit from offering them. Using the real eBay environment in the laboratory, we find that...

This dissertation consists of three chapters relating to various topics in empirical Industrial Organization. The first two chapters deal with the empirical treatment of sales in online markets. The third chapter explores the level of pass-through for taxes on soft drinks. In the first chapter...