Often in cooperative situations, many aspects of the decisionmaking environment are uncertain. We investigate how cooperation is shaped by the way information about risk is presented (from description or from experience) and by differences in risky environments. Drawing on research from risky choice, we compare choices in stochastic social dilemmas to those in lotteries with equivalent levels o...

This paper presents a comprehensive conceptual framework and notation for learner modelling in intelligent tutoring systems. The framework is based upon the computational distinction between behaviour, behavioural knowledge, and conceptual knowledge (in a 'vertical' dimension) and between the system, the learner, and the system's representation of the learner (in a 'horizontal' dimension). All ...

4 This study considers the influence of the knowledge of existing mode shares on travelers 5 mode choice. This contrasts with traditional mode choice models, where the main objective 6 is to predict the overall mode shares as the aggregate of individual mode choices according 7 to variables encompassing attributes of the modes, and characteristics of the travelers. In this 8 study, a computer-a...

In contrast to the traditional modeling of voter choice based on proximity, under directional models, selection of candidates is based on the direction and/or intensity of change from a status quo or neutral point. Voter choice can also be modeled as representing both approaches, e.g., as a directional model with proximity restraint, or alternatively, in terms of proximity to discounted positio...

Abstract This paper is about rational sociality. Retaining rational choice as its basic framework, it aims to enrich it by taking seriously a well-established cultural, social and psychological phenomenon: that some inter-personal relationships have intrinsic value. These are termed primary. Because of the risk of adverse instrumental outcomes, agents offer primary relationships on certain term...

In this study some differences in brand value in online channels are examined and compared with physical channels. The arguments presented lead to two hypotheses about brand loyalty in these environments. The first is that brand loyalty will be greater in online channels and the other that this difference is greater in product categories in which sensory factors predominate (those perceived by ...

Building new and flexible classes of nonseparable spatio-temporal covariances and variograms has resulted a key point of research in the last years. The goal of this paper is to present an up-to-date overview of recent spatio-temporal covariance models taking into account the problem of spatial anisotropy. The resulting structures are proved to have certain interesting mathematical properties, ...

In this contribution our aim is to present a multicriteria linguistic decision making model in which experts might provide their assessments by using linguistic expressions based on comparative terms close to the expressions used by human beings in real world problems or single linguistic terms. To aggregate such a type of linguistic information two symbolic aggregation operators are introduced...

Using data from an e-voting experiment conducted in the 2005 Congressional Election in Argentina, we estimate the effect of different e-voting technologies on the likelihood that citizens cast their vote for different parties for the National Congress and the Legislature of Buenos Aires. Our results indicate that voters are extremely receptive to the information cues provided by the different v...

We define secure implementation with partially honest agents in a social choice model and we show that strategy-proofness is a necessary and sufficient condition for it. This result offers a behavioral foundation for rectangularity ; and it remains valid even with only one partially honest agent. We apply the concept to a single-crossing voting environment, and we prove that it characterizes th...