Calendrier du 19 novembre 2018
Roy Seminar (ADRES)
Du 19/11/2018 de 17:00 à 18:30
Salle R1-09, Campus Jourdan, 48 boulevard Jourdan, 75014 Paris
MOLDOVANU Benny (Bonn University)
Monotonic norms, orthogonality and incentive compatibility in multi-dimensional voting
We study issue-by-issue voting and robust mechanism design in multi-dimensional frameworks where privately informed agents have preferences induced by general norms (distances). We uncover the deep connections between dominant strategy incentive compatibility (DIC) on the one hand, and several geometric/functional analytic concepts on the other. Our main results are: 1) Marginal medians are DIC if and only if they are calculated with respect to a basis such that the norm is orthant-monotonic in the associated coordinate system. 2) Equivalently, marginal medians are DIC if and only if they are computed with respect to coordinates determined by an Auerbach basis such that, for any vector in the basis, any linear combination of the other vectors is Birkhoff-James orthogonal to it. 3) We show how semi-inner products and normality provide an analytic method that can be used to compute all DIC marginal medians. 4) As an application, we derive all DIC marginal medians for lp spaces of any finite dimension, and show that they do not depend on p (unless p = 2).
Régulation et Environnement
Du 19/11/2018 de 12:00 à 13:00
salle R1-13, campus Jourdan, 75014 Paris
TREICH Nicolas (TSE)
An economic model of the meat paradox
écrit avec N. Hestermann et Y. Le Yaouanq
How can individuals care about animals and, at the same time, eat
meat? We design a survey study to explore this meat paradox.
Survey participants (N = 3054) underestimate farm animal suffer-
ing, and underestimate it more (i.e., are less realistic) when they
eat more meat. Building on the literature on cognitive dissonance,
we develop a model in which individuals form self-serving beliefs in
order to reduce the moral guilt associated with meat consumption.
The model characterizes how individuals' beliefs about animal wel-
fare and their attitude towards information are affected by the eco-
nomic environment (e.g., price of meat, salience of animal welfare),
and by individuals' preferences (e.g., taste for meat, moral cost of
guilt). Several empirical observations are consistent with our model.
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