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User:RobLa/MAF: Difference between revisions
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In 2018, [[User:RobLa]] led discussions about "[[MATT]]" and "[[MAF]]" on the [[election-methods mailing list]]. They led to the creation of the "[[Maximum approval top-two]]" and the "[[Majority approval filter]]" pages here on [[electowiki]].
"Maximum approval top-two" or "MATT" is an approval-based primary where voters use an [[W:approval voting|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. ▼
▲* "Maximum approval top-two" or "MATT" is an approval-based primary where voters use an [[W:approval voting|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 ==
=== Maximum approval top-two (MATT) ===
Maximum approval top-two uses the following steps:
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For a system that allows for more than two candidates to advance to the general election, use [[MAF]].
[[Category:Approval methods]]▼
(This is a voting system that was dreamed up by [[User:RobLa]], based on [http://lists.electorama.com/pipermail/election-methods-electorama.com/2018-July/001844.html these discussions on the election methods mailing list])
=== Majority approval filter (MAF) ===
==History==▼
*2018-11-20 - first draft published on electowiki.org and as "[https://medium.com/@robla/replacing-the-jungle-primary-c1e844a5333b Replacing the jungle primary]" by [[User:RobLa]]▼
Full discussion history of this method and it's counterpart ([[Majority approval filter]]) can be found at [[Talk:Majority approval filter]].▼
*[[Majority approval filter|Majority approval filter (MAF)]] - a primary election voting method that is guaranteed to advance all candidates receiving a majority approval score to the general election▼
▲[[Category:Approval methods]]
▲'''"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 often selecting one or more opposition candidates.
:'''''Draft 4''' published December 28, 2018''
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This set of rules is broken into three parts: 1) The goal of MAF, 2) the definition of "Pools" of candidates advanced to the general election in this system, and 3) the rules for populating the Pools of candidates. It is written with some effort toward legal precision and legal document tools-of-the-trade (e.g. the use of [http://lexicontools.com/defined_term.php capitalized "defined terms"]), but more work is needed.
==== Goal ====
A set of rules for holding a primary election with an [[W:Approval Voting|Approval Voting]]-style ballot, providing motivation for all candidates to achieve the highest approval rating, and resulting in a general election Ballot Satisfaction Score of at least 75%. The "Ballot Satisfaction Score" is the percentage of the electorate which approves of at least one candidate on a given ballot.
==== Pools ====
Candidates advancing to the general election must qualify for one of the following "Pools". Candidates that don't qualify for one of the Pools below are "Non-advanced Candidates". By default, all candidates are Non-advanced Candidates until they qualify for one of these Pools:
* "Supermajority Candidate Pool" - all candidates who receive greater than 75% approval
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* "Opposition Candidate Pool" - a subset of candidates who receive greater than 40% approval, but do not qualify for the Plurality Candidate Pool
==== Rules ====
Sequential steps for filling the above Pools with qualified candidates:
# Select the candidate who receives the highest approval rating. This is the "Top Candidate" and automatically qualifies for the general election ballot by one of the following rules:
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# Candidate selection is complete. Advance all candidates in the Supermajority Candidate Pool, the Plurality Candidate Pool, and the Opposition Candidate Pool to the general election.
▲==History==
* MAF (note: Full discussion history of this method can be found at [[Talk:Majority approval filter]])▼
** 2018-12-28 - Draft 4 published at <https://electowiki.org/wiki/MAF>, based on conversation documented at [[Talk:Majority approval filter]])▼
** 2018-12-07 - [https://electowiki.org/w/index.php?title=Majority_approval_filter&oldid=5200 Draft 3] published (with clarifying edits continuing through 2018-12-10). See December email thread "[http://lists.electorama.com/pipermail/election-methods-electorama.com/2018-December/thread.html <nowiki>[EM] Approval-based replacement for jungle primary</nowiki>]" for more discussion about the evolution of this draft▼
**2018-11-22 - Draft 2 published in [http://lists.electorama.com/pipermail/election-methods-electorama.com/2018-November/001925.html 2018-11-22 email from RobLa] (and also available at [[User:RobLa/MAF drafts#Draft 2]]▼
**2018-11-20 - first draft published on electowiki.org and as "[https://medium.com/@robla/replacing-the-jungle-primary-c1e844a5333b Replacing the jungle primary]" by [[User:RobLa]] (and also available at [[User:RobLa/MAF drafts#Draft 1]])▼
▲*MATT: Full discussion history of this method and it's counterpart ([[Majority approval filter]]) can be found at [[Talk:Majority approval filter]]
▲**2018-11-20 - first draft published on electowiki.org and as "[https://medium.com/@robla/replacing-the-jungle-primary-c1e844a5333b Replacing the jungle primary]" by [[User:RobLa]]
===Links to 2018 articles===
▲* 2018-12-28 - Draft 4 published at <https://electowiki.org/wiki/MAF>, based on conversation documented at [[Talk:Majority approval filter]]
▲* 2018-12-07 - [https://electowiki.org/w/index.php?title=Majority_approval_filter&oldid=5200 Draft 3] published (with clarifying edits continuing through 2018-12-10). See December email thread "[http://lists.electorama.com/pipermail/election-methods-electorama.com/2018-December/thread.html <nowiki>[EM] Approval-based replacement for jungle primary</nowiki>]" for more discussion about the evolution of this draft
▲*2018-11-22 - Draft 2 published in [http://lists.electorama.com/pipermail/election-methods-electorama.com/2018-November/001925.html 2018-11-22 email from RobLa] (and also available at [[User:RobLa/MAF drafts#Draft 2]]
▲*2018-11-20 - first draft published on electowiki.org and as "[https://medium.com/@robla/replacing-the-jungle-primary-c1e844a5333b Replacing the jungle primary]" by [[User:RobLa]] (and also available at [[User:RobLa/MAF drafts#Draft 1]])
▲*[[Majority approval filter|Majority approval filter (MAF)]] - a primary election voting method that is guaranteed to advance all candidates receiving a majority approval score to the general election
▲Full discussion history of this method can be found at [[Talk:Majority approval filter]]
[[Category:Approval methods]]
* [[Maximum approval top-two]] (MATT) - a simplification of MAF that is guaranteed to advance no more than two candidates.
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