This paper studies optimal pricing in networks in the presence of local consumption or price externalities. It analyzes the relation between prices and nodal centrality measures. Using an asymptotic approach, it shows that the ranking of optimal prices and strategies can be reduced to the...

Depuis quelques années, les réseaux sociaux et les usages qu'ils nourrissent ont pris une place significative au sein de la galaxie Internet. Parmi ces réseaux, ceux qui pratiquent la gratuité pour les utilisateurs finals n'ont pas encore stabilisé leur modèle économique et ce, malgré...

Empirically the diffusion of competing technologies most often displays either "lock-in" to a quasi-monopoly or apparent turbulence but rarely stable market-sharing. In contrast with widespread views, we show that, first, unbounded increasing returns are neither necessary nor sufficient to lead...

L'article étudie les déterminants de la production scientifique des enseignant-chercheurs français en économie en mobilisant des données originales issues des candidatures aux campagnes nationales 2009 et 2010 de la " Prime d'Excellence Scientifique ". L'échantillon constitué à partir de...

Big airports profits are more and more often coming from commercial activities such as retailing. However, commercial services are relatively far from the original mission of the airport : providing airlines with aviation services such as ground handling, terminal management or airside...

We characterize the equilibrium of a game in vertically differentiated market which exhibits network externalities. There are two firms, an incumbent and a potential entrant. Compatibility means in our model that the inherent qualities of the goods are close enough. By choosing its quality, the...

This paper tries to elicit elements which explain the geography of science-industry collaborations by focusing on their construction process which is rarely studied regarding the existing literature. Constraints linked to the search of resources, on the one hand, and constraints linked to the...

In the late 1990s, Knowledge Management (KM) and Communities of Practice (CoPs) seemed inseparable. CoPs appeared to offer the key to reversing the failure of some of the earlier technologically based attempts to manage knowledge. However, the original CoP concept was built around a very...

Ce rapport de recherche est une synthèse de la littérature en sciences sociales abordant la question de la régulation formelle des communautés en ligne, en particulier celles des sites de réseaux sociaux, de partage de vidéos, de "fanfictions", les communautés open-source, open-media, les...

Despites the great interest caused by social networks in Business Science, their analysis is rarely performed both in a global and systematic way in this field: most authors focus on parts of the studied network, or on a few nodes considered individually. This could be explained by the fact that...