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...

The internet has facilitated the creation of new markets characterized by large scale, increased customization, rapid innovation and the collection and use of detailed consumer and market data. I describe these changes and some of the economic theory that has been useful for thinking about...

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...

Studie zu Dispozinsen / Ratenkrediten Aktenzeichen: 514-06.01-2810HS034 Laufzeit 8/2011 – 5/2012 - Zusammenfassung – In Deutschland verfügen etwa 80 Prozent der Haushalte über einen Dispositionskredit. Bei beträchtlicher Variation liegt der eingeräumte Kreditrahmen bei knapp dem 3-fachen...

It is well-known that a monopolist cannot commit to offer a high-quality contract to a consumer reading costs are positive. This paper shows that this also holds in a competitive environment with consumer heterogeneity if the contract space is unrestricted. If firms can offer standardized...

The increasing pervasiveness of the Internet has dramatically changed the way that consumers shop for goods. Consumer-generated product reviews have become a valuable source of information for customers, who read the reviews and decide whether to buy the product based on the information...

ResumenLa cantidad de información disponible y su dispersión, hace que los individuos acudan a fuentes de información externas a la hora de tomar decisiones de compra o cuando están buscando información con fines académicos y/o investigativos, a fin de obtener recomendaciones que optimicen...