Comparison of electoral systems
Electoral systems are the rules for conducting elections, a main component of which is the algorithm for determining the winner (or several winners) from the ballots cast. This article discusses the justifications which have been offered for different algorithms, both those which elect a unique candidate from a 'single-winner' election and those which elect a group of representatives from a multiwinner election. The choice between the two types of election is a political question not discussed here.
|Part of the Politics series|
A panel of 22 experts on voting procedures were asked in 2010 to say which of 18 representative single-winner voting methods they endorsed. One member abstained. The ranking (with number N of approvers from a maximum of 21) of the various systems was as follows.
|1||Approval voting||15||10||Black's method||3|
|2||Alternative vote (IRV)||10||11=||Range voting||2|
|3||Copeland's method||9||Nanson's method||2|
|4||Kemeny–Young method||8||13=||Leximin method||1|
|5=||Two-round system||6||Smith's method||1|
|Coombs' method||6||Uncovered set method||1|
|Majority judgement||5||Untrapped set||–|