Die Aufwendungen für Online-Werbung sind in den vergangenen Jahren rasant gewachsen. Ihr Anteil am gesamten deutschen Werbemarkt lag 2007 bei sieben Prozent und die Tendenz zeigt weiter steil nach oben. Der Versuch von Microsoft, den weltweit zweitgrößten Suchmaschinenbetreiber, Yahoo, zu...

This paper analyses the equilibrium effects of individual information filters. Information is modelled as advertisements which are distributed across a population of consumers with heterogeneous preferences. An advertisement that provides knowledge about a product with little or no utility for a...

We propose a duopoly model of competition between internet search engines endowed with different technologies and study the effects of an agreement where the more advanced firm shares its technology with the inferior one. We show that the superior firm enters the agreement only if it results in...

This paper analyses the equilibrium effects of individual information filters. Information is modelled as advertisements which are distributed across a population of consumers with heterogeneous preferences. An advertisement that provides knowledge about a product with little or no utility for a...

We develop a duopoly model with advertising supported platforms and analyze incentives of a superior firm to license its advanced technologies to an inferior rival. We highlight the role of two technologies characteristic for media platforms: The technology to produce content and to place...

We survey the economics literature on media as it applies to the Internet. The Internet is an important driver behind media convergence and connects information and communication technologies. While new Internet media share some properties with traditional media, several novel features have...

We investigate whether the publicly available information on Facebook about job applicants affects employers' hiring decisions. To this end, we conduct a field experiment in which fictitious job applications are sent to real job openings in Belgium. The only characteristic in which these...

We analyze a search engine market from a law and economics perspective and incorporate the choice of quality improving innovations by a search engine platform in a two-sided model of internet search engine. In the proposed framework we first discuss the legal issues the search engine market...

Increasingly detailed consumer information makes sophisticated price discrimination possible. At fine levels of aggregation, demand may not obey standard regularity conditions. We propose a new randomized sales mechanism for such environments. Bidders can "buy-it-now" at a posted price, or...

Many video ads are designed to go 'viral,' so that the total number of views they receive depends on customers sharing the ads with their friends. This paper explores the relationship between number of views and how persuasive the ad is at convincing consumers to purchase or to adopt a favorable...