This article studies the identity-based incentives to produce individual efforts on social networks. We integrate self-esteem in individual utilities and we assume that this factor internalizes the assessments of neighbors on own production level. We examine the impact of the structure of social...

We present a model of directed communication network with endogenous link strength. Agents are endowed with a fixed amount of resource which they can distribute over links. They obtain indirect benefit by the path maximizing the product of link strength. In this environment, the wheel...

We study the formation of a communication network under perfect foresight. We show the existence of a non-monotonic relationship between the cost of link formation and the total number of links created in stable networks. This result enhances a dilemma between stable and efficient networks....

We explore collective behaviors in a deterministic mode of interacting agents. We relate unanimity of diversity to the structura conditions of the interaction network.

This paper describes inter-firm partnerships in three major high-tech industries over the 1985-2005 period. We found that the architecture of the respective networks had evolved toward a 'small world' in the early 1990s. We also found that the number of alliances collapsed in the late 1990s....

[eng] While adopting an approach of innovation diffusion in terms of interacting agents, we emphasise the role of cumulated influence in the context of social networks. We first introduce a cumulative effect in the classical epidemic model which involves a slower starting phase followed by a...

[eng] The role of social networks in innovation diffusion remains a strategic question. In former works, we have introduced a relational learning, based on hebbian rule, that leads to a critical state, in which few agents reach structural positions of opinion leaders. In this paper, we show that...

[eng] A recent literature studies economic situations where agents have to form links with others for strategic goals. A major contribution in this field is the focus on dilemmas between stable networks - in the sense of strategie interests - and efficient networks - in the sense of maximization...

A set of agents is organized in a social network, which conveys synergies in two activities. Each agent has one unit of a resource to allocate between two activities. We show that individual choices are shaped by Bonacich centrality measures and an attractiveness multiplier. The latter, combined...