Maximum approval top-two

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"Maximum approval top-two" or "MATT" is an approval-based primary where voters use an approval voting ballot to select which candidates would be acceptable to advance to the general election. The maximum approval top-two method then selects no more than two candidates to advance to a general election.

Rules[edit | edit source]

Maximum approval top-two 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.

For a system that allows for more than two candidates to advance to the general election, use MAF.

(This is a voting system that was dreamed up by User:RobLa, based on these discussions on the election methods mailing list)

History[edit | edit source]

Full discussion history of this method and it's counterpart (Majority approval filter) can be found at Talk:Majority approval filter.

See also[edit | edit source]

  • Majority approval filter - a primary election voting method that is guaranteed to advance all candidates receiving a majority approval score to the general election