In this work, we estimate the market power and interconnection costs with the Lerner index
on the interconnection market. Our work will focus on the hypothesis 'Balanced Calling …

Cet article étudie le choix de la charge d'accès à une infrastructure essentielle dans un
processus totalement décentralisé. Une entreprise intégrée verticalement est en monopole …

Information infrastructures are characterized by the existence of direct and indirect network
externalities. However, the presence of externalities poses two types of problem: they create …

We try in this paper to characterize the state of mobile phone market in Tunisia. Our study is
based on a survey of foreign experience (Europe) in detecting collusive behavior and a …

We present a Cournot model that compares the critical threshold of collusion in Duopoly and
Oligopoly Markets where the actors are private, mixed or public. We assume that the …

With imperfect competition in the mobile phone market, the regulator cannot easily control
the behaviour of the operators. In this paper, we develop an indicator" critical threshold …