This paper investigates the behaviour of multiple decision-maker organisations or bodies, operating in a stochastic environment. Behaviour with a delegated decision maker is examined. A crucial decision is when to delegate to another decision maker. The problem may be intrapersonal, as occurs when there are endogenously changing tastes, or interpersonal where delegation is intuitionally necessa...

A growing literature has focussed attention on ‘expressive’ rather than ‘instrumental’ behaviour in political settings, particularly voting. A common criticism of the expressive idea is that it is rather ad hoc and lacking in both predictive and normative bite. We agree that no clear definition of expressive behaviour has gained wide acceptence to date, and no detailed understanding of the rang...

An important aspect of mechanism design in social choice protocols and multiagent systems is to discourage insincere and manipulative behaviour. We examine the computational complexity of false-name manipulation in weighted voting games which are an important class of coalitional voting games. Weighted voting games have received increased interest in the multiagent community due to their compac...

In parliamentary systems, party leaderships accomplish unity by promising positive incentives to their members of parliament (MP) and threatening them with negative incentives. Regarding reselection, ‘loyal’ active MPs should be rewarded list positions, while rebellious ‘slacking’ punished worse positions or even denied renomination. Although this assumption is central explaining induced discip...

In this paper we start with analysing conservative stable standard of behaviour (CSSB), (Greenberg (1990)) and find that it has very little predictive power in social environments with farsighted players (modelled in Xue (1998)) although intuitively it is quite nice. Therefore, we go into two directions: modify this solution notion a bit and also restrict the class of feasible deviations. We st...

This paper presents a multi-expert system for dynamic signature verification. The system combines three experts whose complementar behaviour is achieved by using both different features and verification strategies. The first expert uses shape-based features and performs signature verification by a wholistic analysis. The second and third expert uses speedbased features and performs signature ve...

The Dutch robot soccer team Clockwork Orange is a research project of the Delft University of Technology and the University of Amsterdam. In this project we study multi-robot collaboration, robot vision and robot control. Our research focus, overviewed in this paper, is on automatic calibration for robust colour segmentation, behaviour based robotics, reinforcement trained dribbling with the ba...