Measuring self-selectivity via generalized Condorcet rules
Author(s)
Advisor
Koray, SemihDate
2011Publisher
Bilkent University
Language
English
Type
ThesisItem Usage Stats
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Abstract
In this thesis, we introduce a method to measure self-selectivity of social
choice functions. Due to Koray [2000], a neutral and unanimous social choice
function is known to be universally self-selective if and only if it is dictatorial.
Therefore, in this study, we confine our set of test social choice functions
to particular singleton-valued refinements of generalized Condorcet rules.
We show that there are some non-dictatorial self-selective social choice functions.
Moreover, we define the notion of self-selectivity degree which enables
us to compare social choice functions according to the strength of their selfselectivities.
We conclude that the family of generalized Condorcet functions
is an appropriate set of test social choice functions when we localize the notion
of self-selectivity.