Election outcomes under different ways to announce preferences: an analysis of the 2015 parliament election in the Austrian federal state of Styria

Abstract

We use preference data from the 2015 parliament election in the Austrian federal state of Styria to analyze different voting rules. An exit poll right after the election collected data on ordinal and cardinal preferences from approximately 1000 actual voters. Our analysis is threefold. First, we determine the hypothetical social outcomes under different voting rules; second, we investigate the stability of the outcomes under those rules. Finally, we provide a categorization of different types of parties and analyze the impact of certain voting rules (Plurality Rule, Plurality Run Off, Hare System, Condorcet Method, Approval Voting, Borda Rule, Evaluative Voting, and Majority Judgment) on the performances of parties in those scenarios.

Some regrettable grading scale effects under different versions of evaluative voting

“…Following Baujard et al (2014 ) and Darmann et al (2017), in drawing distinctions between the election outcomes for different rules or different versions of one rule, we suppose that assertions such as "this type of candidate is favored or unfavored" make sense since it allows us to refer to general categories of candidates independently of their political color.…”

Une expérimentation de deux modes de scrutin en Martinique lors du premier tour de l’élection présidentielle de 2017

“…Des expériences similaires ont été menées en Allemagne (Al÷s-Ferrer et Granic, 2010), au Bénin (Kabre et al, 2012). Des expériences du même genre, mais sur Internet, ont aussi été menées au Canada, en France et en Islande (Van der Straeten et al, 2013, Blais et al, 2015, et plus récemment en Autriche (Darmann et al, 2017). Le lecteur pourra se référer à la remarquable revue de la littérature faite par Baujard et al (2016) pour avoir un aperçu des diérentes expérimentations menées en France lors des élections présidentielles de 2012.…”