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 paper is dedicated to the answer of the unresolved question since the turning 1989 whether the popular for their advantages joint ventures manifest in Bulgaria one of their most important disadvantages, namely the realization of the two main types of infringements of competition –...

The European Commission is introducing new regulations on submission and publication of data in electricity markets (SPDEM) and on wholesale energy market integrity and transparency (REMIT). I discuss issues relevant for undertaking an evaluation such regulations. I argue that, for market...

Are there circumstances when antitrust courts should condemn above-cost predatory pricing? To what extent would Brooke Group need to be relaxed to condemn such conduct? The premise is that there are circumstances where antitrust courts should conduct a further inquiry and potentially condemn...

The impact of product variety on welfare has received little attention in the electronic commerce literature. The problem with product variety is that more variety does not necessarily imply higher welfare. This paper finds the conditions under which more variety, if caused by lower fixed costs,...

Following the Internet’s widespread adoption, much economic work has studied ‘online platforms’: firms that mainly interact with consumers in cyberspace. This article surveys such work, focusing on the ways in which traditional economic models have been adapted to incorporate...