Many objectives can be achieved (or may be achieved more effectively) only by a group of
agents executing a team plan. If a team plan fails, it is often of interest to determine what …

This article presents a high-level overview of the literature on norms and their uses in multi-
agent systems. We distinguish the main types of norms used in multi-agent systems, and the …

Normative multi-agent systems offer the ability to integrate social and individual factors to
provide increased levels of fidelity with respect to modelling social phenomena, such as …

We have developed a refined institutional scheme derived from Crawford and Ostrom's
Grammar of Institutions (also referred to as ADICO) that has been adapted for the detailed …

We introduce a number of logics to reason about collective propositional attitudes that are
defined by means of the majority rule. It is well known that majoritarian aggregation is …

An increasing number of applications are using the Internet for voice transmission, and
hence there is a growing demand for the Internet phone. However, the Internet was not …

The multi-agent system paradigm has proved to be very promising for solving complex
problems because agents are able to behave autonomously and cooperate to achieve …

This paper is a contribution to the development of an ontology of conflict. In particular, we
single out and study a peculiar notion of group conflict, that we suggestively label “social …

We present a number of modal logics to reason about group norms. As a preliminary step,
we discuss the ontological status of the group to which the norms are applied, by adapting …

We consider the problem of decomposing a group norm into a set of individual obligations
for the agents comprising the group, such that if the individual obligations are fulfilled, the …