A Note on Affine Aggregation


Economics Letters

1995, vol. 47, pp.177-183

Départements : Economie et Sciences de la décision, GREGHEC (CNRS)

If a vector-valued function has convex range and one of its components is related to the others by a Pareto-like condition, that component must be affine w.r.t. the others; sign restrictions on the coefficients follow from suitably strengthening the unanimity condition. The theorem is applied to social choice and decision theories

Aggregation of Semi-Orders: Intransitive Indifference Makes a Difference

I. GILBOA, R. Lapson

Economic Theory

1995, vol. 5, pp.109-126

Départements : Economie et Sciences de la décision, GREGHEC (CNRS)

An Integrated Model of Waste Management Behavior: A Test of Household Recycling and Composting Intentions


Environment and Behavior

septembre 1995, vol. 27, n°5, pp.603-630

Départements : Information Systems and Operations Management, GREGHEC (CNRS)

This study examines the antecedents of recycling and composting intentions in the context of an integrated waste management behavior model. This model incorporates a wide variety of important factors from previous research on environmental behavior. The theory of planned behavior provides a theoretical framework to integrate these factors. The model was tested using both recycling and composting data from a sample of more than 700 individuals. Overall, the results suggest that this model fits the data well, helping to explain intentions to engage in recycling and composting

Applying Social and Traditional Marketing Principles to the Reduction of Household Waste: Turning Research Into Action


American Behavioral Scientist

1995, vol. 38, n°4, pp.646-657

Départements : Marketing, GREGHEC (CNRS)

Assessing IT Usage: The Role of Prior Experience


MIS Quarterly

décembre 1995, vol. 19, n°4, pp.561-570

Départements : Information Systems and Operations Management, GREGHEC (CNRS)

Mots clés : IT usage, user experience, Technology Acceptance Mode

A variety of models that incorporate attitudinal, social, and control factors have been advanced to explain IT usage (e.g., Davis, 1989; Davis, et al., 1989; Hartwick and Barki, 1994; Mathieson, 1991; Moore and Benbasat, 1991; Thompson, et al., 1991), of which the Technology Acceptance Model (TAM) (Davis, 1989) is the most well known. One goal of such models is to develop diagnostic tools to predict information systems acceptance and facilitate design changes before users have experience with a system (Davis, 1989). However, empirical tests of these models have generally focused on either systems that were already in use by the study participants, or systems that the participants were familiar with, such as word processing packages and spreadsheets. Given this, it is unclear: (1) whether models such as TAM are predictive of behavior for inexperienced users and, more importantly, (2) whether the determinants of IT usage are the same for experienced and inexperienced users of a system. To address these issues, this paper reports on a study of 430 experienced and 356 inexperienced potential users of an IT system--specifically, a student computing information resource center. Using an augmented version of TAM that incorporates social influences and behavioral control, the experienced and inexperienced user groups are compared. To address issue (1) above, the model was tested to show whether it provides an equivalent understanding of usage for both groups. Then to test issue (2), specific paths in the model were compared between the two groups. The overall goal of this research is to assess the efficacy of the augmented TAM in helping, a priori, to understand the behavior of inexperienced users

Assessing the Social Influence of Television: A Social Cognition Perspective


Communication Research

1995, vol. 22, n°4, pp.402-429

Départements : Marketing, GREGHEC (CNRS)

Belief Closure - A Semantics of Common Knowledge for Modal Propositional Logic

L. Lismont, P. MONGIN

Mathematical Social Sciences

1995, vol. 30, pp.127-153

Départements : Economie et Sciences de la décision, GREGHEC (CNRS)

The paper investigates the relations between iterate and fixed-point accounts of common belief and common knowledge, using the formal tools of epistemic modal logic. Its main logical contribution is to introduce and axiomatize the following (fixed-point) notion of common belief. We first define a proposition to be belief-closed if everybody believes it in every world where it is true. We then define a proposition to be common belief in a world if it is implied by a belief-closed proposition that everybody believes in that world. Using the belief closure semantics of common belief, the paper proves soundness and completeness theorems for modal logics of varying strength. The weakest system involves a monotonicity assumption on individual belief; the strongest system is based on S5. Axiomatizations of common knowledge are secured by adding the truth axiom to any system. The paper also discusses anticipations of the belief closure semantics in the economic and game-theoretic literatures

Buyer Characteristics of the Green Consumer and Their Implications for Advertising Strategy


Journal of Advertising

1995, vol. 24, n°2, pp.71-82

Départements : Marketing, GREGHEC (CNRS)

Canonical Representation of Set Functions

I. GILBOA, D. Schmeidler

Mathematical Methods of Operations Research

1995, vol. 20, pp.197-212

Départements : Economie et Sciences de la décision, GREGHEC (CNRS)

Case-Based Decision Theory

I. GILBOA, D. Schmeidler

Quarterly Journal of Economics

1995, vol. 110, pp.605-639

Départements : Economie et Sciences de la décision, GREGHEC (CNRS)