Approval-based primary election methods: Difference between revisions

 

The "St, Louis method" is the only one in use in public elections, as it was adopted by the city of St. Louis for their non-partisan primaries in 2019.<ref name=":0">{{Cite web|url=https://stlapproves.org/s/PETITION.pdf|title=PETITION FOR PROPOSITION D|last=STL Approves|first=|date=|website=STL Approves|url-status=live|archive-url=|archive-date=|access-date=}}</ref>

== History ==

In 2018, [[User:RobLa]] led discussions about "[[MATT]]" and "[[MAF]]" on the [[election-methods mailing list]].<ref name=":1">{{Cite web|url=http://lists.electorama.com/pipermail/election-methods-electorama.com/2018-July/001844.html|title=[EM] A simpler approval based way of replacing the CA jungle primary|last=Lanphier|first=Rob|date=2018-07-18|website=lists.electorama.com|url-status=live|archive-url=|archive-date=|access-date=2021-02-06}}</ref><ref name=":2">{{Cite web|url=https://medium.com/@robla/replacing-the-jungle-primary-c1e844a5333b|title=Replacing the jungle primary|last=Lanphier|first=Rob|date=2018-11-25|website=Medium|language=en|access-date=2021-02-06}}</ref> They led to the creation of the "[[Maximum approval top-two]]" and the "[[Majority approval filter]]" pages here on [[electowiki]].

The rules for the various methods are described below, in order from simplest to most complicated:

 

=== St. Louis method ===

[[File:STL-sample-ballot-for-2021-03-02-election.png|thumb|Heading from the sample ballot for Heading from sample ballot for the March 2021 primary election in [[St. Louis, Missouri]]<ref>https://www.stlouis-mo.gov/government/departments/board-election-commissioners/documents/upload/Mar2021AllRacesBallot2.pdf</ref><ref>https://www.reddit.com/r/EndFPTP/comments/lfn1sh/sample_approval_voting_ballot_for_the_march_2nd/</ref>

The St. Louis method is defined in a short paragraph on the 2020 ballot petition:<ref name=":0" /><blockquote>''Notwithstanding any other provision of law to the contrary, in the primary election for the [offices in question], voters shall select as many candidates as they approve of for each office. The two candidates receiving the most votes for each office shall advance to the general election. The candidate for each office receiving the most votes in the general election shall be declared the winner.''</blockquote>The ballot petition above passed with over 68% of the vote in the [[St. Louis, Missouri|city of St. Louis]] in November 2020.<ref>{{Cite web|last=Schlinkmann|first=Mark|title=Overhaul of St. Louis election system passes, residency rule repeal fails|url=https://www.stltoday.com/news/local/govt-and-politics/overhaul-of-st-louis-election-system-passes-residency-rule-repeal-fails/article_d37f0b73-c0b6-56d7-b093-8d069c314813.html|access-date=2021-02-06|website=STLtoday.com|language=en}}</ref> The system was used in the [[2021 St. Louis mayoral election]], resulting in the election of [[Tishaura Jones]].

 

=== Maximum approval top-two (MATT) ===

{{main|User:RobLa/MATT}}