We study and compare two frameworks: a model of influence, and command games. In the influence model, in which players are to make a certain acceptance/rejection decision, due to influence of other players, the decision of a player may be different from his inclination. We study a relation...

Finding a solution concept is one of the central problems in cooperative game theory, and the notion of core is the most popular solution concept since it is based on some rationality condition. In many real situations, not all possible coalitions can form, so that classical TU-games cannot be...

This article explains the level of economic freedom in Muslim countries through the theory of institutional path dependency. Islamic countries are generally not free and they have a poor record regarding property rights. To explain these realities we use the institutional history of Muslim...

The paper concerns a model of influence in which agents make their decisions on a certain issue. It is assumed that each agent is inclined to make a particular decision, but due to a possible influence of the others, his final decision may be different from his initial inclination. Since in...

L'étude de la relation paysage - marché n'est pas aisée car elle met en perspective deux réalités difficiles à appréhender : le marché et le paysage. L'introduction du présent ouvrage a exposé une revue des approches et des définitions du paysage. Pour ce chapitre la définition...

The paper concerns a dynamic model of influence in which agents have to make a yes-no decision. Each agent has an initial opinion, which he may change during different phases of interaction, due to mutual influence among agents. The influence mechanism is assumed to be stochastic and to follow a...

We study cooperative games associated with a communication structure which takes into account a level of communication between players. Let us consider an undirected communication graph : each node represents a player and there is an edge between two nodes if the corresponding players can...

This article explains the level of economic freedom in Muslim countries through the theory of institutional path dependency. Islamic countries are generally not free and they have a poor record regarding property rights. To explain these realities we use the institutional history of Muslim...

We deliver a short overview of di erent centrality measures and influence concepts in social networks, and present the relation-algebraic approach to the concepts of power and influence. First, we briefly discuss four kinds of measures of centrality: the ones based on degree, closeness,...

Cooperation structures without any {\it a priori} assumptions on the combinatorial structure of feasible coalitions are studied and a general theory for mar\-ginal values, cores and convexity is established. The theory is based on the notion of a Monge extension of a general characteristic...