L'exposé présente un certain nombre d'éléments expliquant pourquoi les activités se développant sur le Net ne peuvent pas être bien appréhendées dans un contexte de concurrence parfaite, et discute la nature des barrières à l'entrée. Nous verrons que l'essentiel des changements...

Participants in a market, buyers and sellers, may need the service of an intermediary who will put them into contact and give them information about their potential trading partner. The intermediary chooses what price it will charge to each side to have access to its service. It also chooses...

[fre] Cet article présente des éléments d'analyse dérivés de la théorie de l'organisation industrielle qui éclairent le développement récent des activités économiques sur Internet. L'exposé présente de façon synthétique une partie du matériel développé plus en détail dans...

This article presents some pieces of analysis derived from the theory of industrial organisation that shed light on the recent development of electronic commerce on Internet. Classification JEL : L 86

This article presents some pieces of analysis derived from the theory of industrial organisation that shed light on the recent development of economic activities on Internet. The survey draws in a synthetic way from material exposed more extensively in Gaudeul-Jullien [2000], concerning online...

Platforms use search diversion in order to trade off total consumer traffic for higher revenues derived by exposing consumers to unsolicited products (e.g. advertising). We show that the entry of a platform competitor leads to higher (lower) equilibrium levels of search diversion relative to a...

We consider a network that intermediates traffic between free content providers and consumers. Two-sided pricing of consumers and content providers allows profit extraction by the network and transmission of information on the social value of content. Profit maximizing tariffs give the content...