Rosalie J. Carlson

Harvey Mudd College Mathematics 2013

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Thesis Proposal: Voting in Interval Societies
Thesis: Voter Compatibility in Interval Societies
Thesis Advisor: Prof. Francis Edward Su
Second Reader: Prof. Michael Orrison
E-Mail: rcarlson@g.hmc.edu

Voter Compatibility in Interval Societies

In an interval society, voters are represented by intervals on the real line, corresponding to their approval sets on a linear political spectrum. I imagine the society to be a representative democracy, and ask how to choose members of the society as representatives. Following work in mathematical psychology by Coombs and others, I develop a measure of the compatibility (political similarity) of two voters. I use this measure to determine the popularity of each voter as a candidate. I then establish local "agreeability" conditions and attempt to find a lower bound for the popularity of the best candidate. Other results about certain special societies are also obtained.