User:RobLa/MAF

"majority approval filter" or "MAF" is an approval-based primary that would typically select two candidates to advance to a general election. 

Rules

Majority approval filter uses the following steps:

1. 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.
2. 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.
3. 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)

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