This article aims to examine how the size of P2P file-sharing communities affects their functioning and performance (i.e. their capacity to share and distribute content). Olson (1965) argued that small communities are more able to provide collective goods. Using an original database on...

The eBay Feedback Forum is claimed to be a crucial component of the success of eBay. Many empirical studies have found that this feedback system exerts a deterrent effect on the opportunistic behavior the Internet's anonymity may incite buyers and sellers to adopt. The feedback system in place...

The paper proposes an analytical framework for comparing different business models for producing information goods and digital services. It is based on three dimensions that also refer to contrasted literature: the economics of matching, the economics of assembling and the economics of knowledge...

This paper is intended to address the economic and legal challenges of regulating digital "platforms, and leads to the following conclusions. The concept of platform covers broad range of services and business models that have very little in common. Before considering regulatory measures...

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...

Sponsored search advertisements are an essential component of e-marketing strategies and a substantial source of revenue for search engines. Most sponsored ads are sold through keyword auctions. We analyze a game-theoretic model to explore the impact of organic links (links generated by the...

Most developed countries have tried to restrain digital piracy by strengthening laws against copyright infringement. In 2009, France implemented the Hadopi law. Under this law individuals receive a warning the first two times they are detected illegally sharing content through peer to peer (P2P)...

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...

The increasing demand for real-time applications (video conferencing, Internet telephony - VoIP - etc.) delivered over Internet networks requires stringent Quality of Service (QoS) guarantees. Internet traffic routing based on a Best-effort basis can hardly support these QoS requirements. This...

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...