Economics Talk: A Taxonomy of Non-dictatorial Domains | Shiv Nadar University
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Economics Talk: A Taxonomy of Non-dictatorial Domains

shiv nadar university economics talk
Event Date: 
Friday, March 19, 2021 -

The Department of Economics invites you to a virtual talk titled ‘A Taxonomy of Non-dictatorial Domains’ by Dr. Huaxia Zeng, Associate Professor - Microeconomic Theory and Mechanism Design, Shanghai University of Finance and Economics, on March 19, 2021.

Abstract of the Talk
A preference domain is called a non-dictatorial domain if it allows the design of unanimous social choice functions (henceforth, rules) that are non dictatorial and strategy-proof; otherwise it is called a dictatorial domain. The researchers propose a richness condition on the domain and establish that the unique seconds property (introduced by Aswal, Chatterji, and Sen (2003)) separates non-dictatorial domains from dictatorial domains. The principal contribution of the paper is the subsequent exhaustive classification of all rich non-dictatorial domains based on a simple property of two-voter rules called invariance. The preference domains that constitute the classification are semi-single-peaked domains (introduced by Chatterji, Sanver, and Sen (2013)) and semi-hybrid domains (introduced here) which are two appropriate weakenings of single peaked domains and which, importantly, are shown to allow strategy-proof rules to depend on non-peak information of voters’ preferences. As a refinement of the classification, single-peaked domains and hybrid domains emerge as the only rich preference domains that force strategy-proof rules to be determined completely by the peaks of voters’ preferences. 

Friday 19, Mar 2021
04:00 PM - 05:30 PM