Strategyproof Choice of Social Acts

Group-Strategyproof Irresolute Social Choice Functions

We axiomatically characterize the class of pairwise irresolute social choice functions that are group-strategyproof according to Kelly’s preference extension. The class is narrow but contains a number of appealing Condorcet extensions such as the minimal covering set and the bipartisan set, thereby answering a question raised independently by Barberà (1977a) and Kelly (1977). These functions fu...

Finding strategyproof social choice functions via SAT solving

G./Endriss, 2011: Automated theorem search (through a universal reduction step) for ranking sets of objects B./G./Seedig, 2014: Finding preference profiles for k-majority digraphs G., 2014: Finding preference profiles of given Condorcet dimension • In this paper Method: more evolved technique to also treat strategyproofness for irresolute social choice functions Results: e.g., efficiency and st...

Topological Social Choice Topological Social Choice

The topological approach to social choice was developed by Graciela Chichilnisky in the beginning of the eighties. The main result in this area (known as the resolution of the topological social choice paradox) shows that a space of preferences admits of a continuous, anonymous, and unanimous aggregation rule for every number of individuals if and only if the space is contractible. Furthermore,...

Social Choice

Pretend Acts Using Social Cues

Children engage in pretend play from around 18 months of age, rarely confusing their “pretend” world with the “real” world. It has been recently suggested that various social cues and behavioural regularities presented by parents during their own pretend play enhance the ability of children to quarantine pretend acts from real acts. However, a question that has received little empirical investi...