This paper analyses the incentives of a vertical integrated Internet service provider (ISP) to block competitors from content markets. Using a simple model we find that the ISP does not block competing content providers as long as the contents are differentiated sufficiently. Exclusion only...

Google is supposed to be the dominant player in most search markets around the world. But what is a search market? To calculate a market share of 90% or more, it has to be clear what the denominator is: Does the search market also include product search and therefore Amazon and eBay or the...

The fundamental change of energy policy in Germany (the so-called Energiewende) has lead to a discussion how the security of electricity supply will be affected by the heavily subsidised expansion of electricity generation from renewable energies, as electricity generation from renewable...

We explore whether lawful cooperation in buyer groups facilitates collusion in the product market. Buyer groups purchase inputs more economically. In a repeated game, abandoning the buyer group altogether or excluding single firms constitute credible threats. Hence, in theory, buyer groups...

We estimate the impact of renewable energy sources on the merit order and the wholesale price in Spain. We use a structural vectorautoregressive model for the merit order of production and argue that wind and solar production are exogenous to the system. As expected the overall effect is...

We explore whether lawful cooperation in buyer groups facilitates collusion in the product market. Buyer groups purchase inputs more economically. In a repeated game, abandoning the buyer group altogether or excluding single firms constitute credible threats. Hence, in theory, buyer groups...

This paper analyzes the influence of advertisers on the results of the ASP World Tour in surfing. The close connection of the event with its sponsor, the interest of the sponsor in the outcome of the event, and the observability of the results allow to test the existence of a profit-orientated...