The aim of this paper is to understand the rationale of cooperation within online sharing communities. How can we explain the extent of cooperative interactions between anonymous distant Internet users ? We build a game theoretic framework to study the exchange of services within virtual...

Regulation in telecommunication industry is one of the most sophisticated sectorial regulation. Two main goals are targeted by public authorities. In one hand, the regulator is trying to build a competitive market to replace the historic monopolistic situation. Now the emphasis is less on the...

This paper aims to study how Facebook use influences individual well-being. We use a survey conducted on a representative sample of 2,000 French Facebook users. Our results show that Facebook interferes with subjective well-being through its effects on friendships and self-esteem. Hence we find...

As people are spending more time online, it is important to evaluate the impact of Internet use on individual well-being. Internet use yields direct utility and economic returns (e.g. better job, higher productivity) that may increase life satisfaction. But the Internet might also have...

This paper develops a model of oligopolistic price competition to analyze the impact of online intermediaries such as Autobytel.com on the price setting process in the automobile market. The roles of dealer search costs, the fraction of buyers using the intermediary, the value of the item being...

French E-commerce sales have tremendously grown these last two years, even if the estimated amount of transaction is still marginal. Beyond this relative success, E-commerce raises many questions. Are electronic markets more competitive than traditional markets? How can we explain price...