Calendrier du 28 novembre 2016
Roy Seminar (ADRES)
Du 28/11/2016 de 17:00 à 18:30
Campus jourdan,Bâtiment E, Rez de chaussée, Salle 101
LARAKI Rida (CNRS et Lamsade)
Majority Judgment vs. Majority Rule
écrit avec Michel Balinski
The validity of majority rule in an election with but two candidates---and so also of Condorcet consistency---is challenged. Axioms based on evaluating candidates---paralleling those of K. O. May characterizing majority rule for two candidates based on comparing candidates---lead to another method, majority judgment, that is unique in agreeing with the majority rule on pairs of ``polarized'' candidates. It is a practical method that accommodates any number of candidates, avoids both the Condorcet and Arrow paradoxes, and best resists strategic manipulation. It may also be viewed as a ``solution'' to Dahl's (reformulated) intensity problem in that an intense minority sometimes defeats an apathetic majority.
Texte intégral
Régulation et Environnement
Du 28/11/2016 de 12:30 à 14:00
VARIAN Hal (Google, Berkeley)
Use and Abuse of Network Effects
The term ``network effects'' has a clear meaning in the context of economic models, but it is sometimes confused with other concepts like increasing returns to scale and learning-by-doing. This essay is an attempt to clear up some of this confusion.