Stéphen Bertrand. Ces voies qui vous empruntent

Fouille d'opinion : ces mots qui changent de polarité selon le domaine

Sentiment is expressed differently in different domains. For instance, words which are used in both domains can change their polarity. In this article, we present a study on these multi-polarity words. We first show that these multi-polarity words are actually used by automatic opinion classifiers and affect their performances: the classification performance improves if the multi-polarity words...

Cancer de la cavité orale chez trois frères germains en Mauritanie

Résumé Les facteurs de risque majeurs pour les cancers de la cavité orale sont la consommation d'alcool et le tabac mais une composante héréditaire a également été évoquée. L’observation que nous vous présentons ci-dessous a pour objectif d’illustrer cette composante parmi les autres facteurs de risque plus connus. C’est l’histoire de trois frères germains ayant présenté chacun un cancer de la ...

Bertrand competition

Bertrand competition is a model of competition used in economics, named after Joseph Louis François Bertrand (1822-1900). Specifically, it is a model of price competition between duopoly firms which results in each charging the price that would be charged under perfect competition, known as marginal cost pricing. The model has the following assumptions: There are at least two firms producing ho...

Bertrand Supertraps

We study oligopoly price competition between multiproduct firms, firms whose products interact in the profit function. Specifically, we focus on the impact of intra-firm product interactions on the level of equilibrium profits. This impact is divided into two effects: a direct effect and a strategic effect (i.e., through the competitors’ actions). We derive conditions such that the strategic ef...

Optimisation des tournées d'inspection des voies