[EM] Electowiki article about VoteFair representation ranking

VoteFair electionmethods at votefair.org
Sat Jan 18 21:11:08 PST 2020

I wrote an Electowiki article that describes VoteFair representation 
ranking.  The "history" section explains its origin and usage.  Here is 
the link to it:


The section titled "calculation steps" describes it in detail, and an 
example is supplied.

Richard Fobes

For convenience, below is the opening text from the article:

VoteFair representation ranking is a Proportional-representation (PR) 
vote-counting method that uses ranked ballots and selects a candidate to 
win the second seat in a two-seat legislative district. The second-seat 
winner represents the voters who are not well-represented by the 
first-seat winner. Any single-winner election method that uses ranked 
ballots and pairwise counting can be used for the popularity calculations.

This method can be repeated, such as to select the winners of the second 
and fourth seats in a five-seat district.


This method first identifies which voters are well-represented by the 
first-seat winner. Then a reduced influence is calculated for these 
ballots. Their influence is determined by the extent to which they 
exceed the 50% majority minimum that is needed to elect the first-seat 
winner. The remaining ballots have full influence. Using these adjusted 
influence levels, the most popular of the remaining candidates becomes 
the second-seat winner.

This method ignores which political party each candidate is in, yet the 
winners typically are from different political parties.

If a district has 5 seats, the third-seat winner and the fourth-seat 
winner are identified using the same steps that were used to fill the 
first two seats. In this case the fifth-seat winner would be determined 
by asking voters to indicate their favorite political party, calculating 
which party is most under-represented, looking at just the ballots that 
indicate that party as their favorite, and identifying the most popular 
candidate from that party.

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