This paper presents a model of influence where agents' beliefs are based on an objective reality, such as the properties of an environment. The perception of the objective reality is not direct: all agents know is that the more correct a belief, the more successful the actions that are deduced...

We consider a model of socially interacting individuals that make a binary choice in a context of positive additive endogenous externalities. It encompasses as particular cases several models from the sociology and economics literature. We extend previous results to the case of a general...

We aim to identify the conditions under which social influence enables emergence of a shared opinion orientation among members of an organization over time, when membership is subject to continuous but partial turnover. We study an intra-organizational advice network that channels social...

Faced with strong environmental issues, the agricultural sector has to revise deeply its aims and performance criteria. Numerous methods have been proposed to involve heterogeneous stakeholders in farming system design, and several authors highlight the importance of reflexivity in such...

A vast recent literature has stressed social fragmentation's negative impact on the provision of public goods. This is a key issue, given that public goods availability has been reckoned as crucial to economic development, while developing countries' societies often exhibit high degrees of...

Stakeholder perspectives on crisis management provide a useful descriptive framework for analyzing crises and making crisis narratives. However, their "actionability" for crisis management, i.e. possibility to use stakeholder management models into operational crisis management processes,...

The ability to produce local public goods and services such as sharing savings, risk, insurance, sanitation and educational services, is a key fator for development. This ability, however, varies greatly across communities (Ostrom 1990 ; Khwaja 2009). Considering that this ability depends...

A vast recent literature has stressed social fragmentation's negative impact on the provision of public goods. It has been established theoretically that social fragmentation engenders discord and thereby undermines public goods provision. Empirical research has produced mixed results about this...

Effective solutions for integrating agricultural development and conservation of biodiversity at the landscape scale remain to be identified. We present a case study in an intensively farmed French cereal plain, where the reintroduction of grasslands has been proposed first for conservation...

A group of agents voluntarily participates in a joint project, in which efforts are not perfectly substitutable. The output is divided according to some given vector of shares. A share vector is unimprovable if no other share vector yields a higher sum of payoffs. When the elasticity of...