Aggressive interactions are a common means of contesting resources for most animals. Considerable variation occurs in whether a specific individual wins a particular aggressive contest. Influences on the behaviour of individuals that might produce this variation include, among many factors, hunger, size, residency and age (Beaugrand et al. 1996; Hsu et al. 2005). Behavioural ecologists have bee...

Incentives are more likely to elicit desired outcomes when they are designed based on accurate models of agents’ strategic behavior. A growing literature, however, suggests that people do not quite behave like standard economic agents in a variety of environments, both online and offline. What consequences might such differences have for the optimal design of mechanisms in these environments? I...

The Arc Segmentation Contest, as the fifth in the series of graphics recognition contests organized by IAPR TC10, was held in association with the GREC’2003 workshop. In this paper we present the report of the contest: the contest rules, performance metrics, test images and their ground truths, and the outcomes.

We address the presence of supplier-induced demand in the Belgian primary care market, which is characterized by a …xed fee system and a high density of General Practitioners (GP). Using a unique dataset on the number of visits of all Belgian GPs, we …rst investigate whether we can …nd evidence of demand inducement by Belgian GPs. Novel to this literature is that we furthermore investigate whic...