User:RobLa/MAF
"majority approval filter" or "MAF" is an approval-based primary election method that advances all candidates who are approved by a majority of the electorate, as well as usually selecting an opposition candidate. Voters use an approval voting ballot to select which candidates would be acceptable to advance to the general election. If most voters engage in bullet voting, it would typically select two candidates to advance to a general election.
Rules
Draft 3
in progress...
Draft 2
published November 22, 2018
See 2018-11-22 email from RobLa
Draft 1
published November 20, 2018
Majority approval filter uses the following steps:
- The candidate who receives the highest approval rating (the "front-runner") qualifies for the general election
- Example: if there are 100 voters, and 40 approve of "A" and "B", 30 approve of only "B", and 30 approve of only "C", then
- "B" advances to the general election, since "B" is approved by 70% of voters.
- Example: if there are 100 voters, and 40 approve of "A" and "B", 30 approve of only "B", and 30 approve of only "C", then
- A second candidate (the "complementary candidate"), who maximizes the approval of the electorate, also qualifies (i.e. by having the highest approval among voters that did not approve of the front-runner). If two candidates both satisfy an equal part of the remaining electorate, the candidate with the highest overall approval rating advances.
- Example: if there are 100 voters, and 40 approve of both "A" and "B", 30 approve of only "B", and 30 approve of only "C", then
- "B" advances with 70% approval (per step 1)
- "C" advances (per this step). "B" satisfies 70% of the electorate, and "C" satisfies the other 30%. So, 100% of the voters will be satisfied with one of their choices in the general election.
- Example: if there are 100 voters, and 40 approve of both "A" and "B", 30 approve of only "B", and 30 approve of only "C", then
- All candidates who receive over 50% approval ("majority approval candidates") also qualify for the general election
- Example: if there are 100 voters, and 50 approve of "A" and "B", 20 approve of only "B", and 30 approve of only "C", then :
- "B" advances with 70% approval (per step 1)
- "C" advances, satisfying the other 30% of the electorate, making the total 100% (step 2)
- "A" advances as well (having achieved 50% approval)
- Example: if there are 100 voters, and 50 approve of "A" and "B", 20 approve of only "B", and 30 approve of only "C", then :
History of MAF
- 2018-11-20 - first draft published on electowiki.org and as "Replacing the jungle primary" by User:RobLa
Full discussion history of this method can be found at Talk:Majority approval filter
See also
- Maximum approval top-two (MATT) - a simplification of MAF that is guaranteed to advance no more than two candidates.