Advertising competes for scarce consumer attention, so more profitable advertisers send more messages to break through the others' clutter. Multiple equilibria can arise: more messages in aggregate induce more "shouting to be heard", dissipating profit. Equilibria can involve a small range of...

Cet article rend compte d'une recherche sur l'utilisation de la messagerie électronique (e-mail) dans la relation de contrôle hiérarchique. Trois caractéristiques de cette NTIC (caractère quasicontractuel, large diffusion et convivialité) expliquent que l'e-mail soit un outil de...

In recent years, there has been a rising concern about the policy of major search engines, and more specifically about their ranking in so-called organic results corresponding to keywords searches. The associated proposition is that their behavior should be regulated. The concern comes from...