San Francisco 2010 Municipal Election - District 6

The San Francisco 2010 Municipal Election - District 6 took place on 2010-11-02. Jane Kim won after 12 runoff rounds, and was also the Condorcet winner.

Runoff Rounds

This diagram shows the votes of each remaining candidate at each round, as well as the breakdown of votes transferred when each candidate was eliminated.

Jane Kim Debra Walker Theresa Sparks James Keys Matt Drake Glendon ''Anna Conda'' Hyde Elaine Zamora Dean Clark Jim Meko George Vazhappally Matt Ashe H. Brown George Davis Fortunate ''Nate'' Payne Write-in Exhausted Ballot Jane Kim Debra Walker Exhausted BallotRound 1Round 2Round 3Round 4Round 5Round 6Round 7Round 8Round 9Round 10Round 11Round 12

Pairwise Preferences

For every pair of candidates, this table shows what fraction of voters preferred one to the other. A preference means that either a voter ranks a candidate ahead of the other, or ranks a candidate but does not list the other. Ballots which list neither candidate are not counted towards the percent counts.

Less PreferredMore PreferredJane KimDebra WalkerTheresa SparksJames KeysMatt DrakeGlendon ''Anna Conda'' HydeElaine ZamoraDean ClarkJim MekoGeorge VazhappallyMatt AsheH. BrownGeorge DavisFortunate ''Nate'' PayneWrite-inJane KimDebra WalkerTheresa SparksJames KeysMatt DrakeGlendon ''Anna Conda'' HydeElaine ZamoraDean ClarkJim MekoGeorge VazhappallyMatt AsheH. BrownGeorge DavisFortunate ''Nate'' PayneWrite-in54.1%65.9%84.9%86.6%86.6%88.4%89.0%89.5%95.1%95.9%95.0%95.5%95.2%99.5%45.9%60.8%82.7%82.0%83.2%83.3%86.3%87.7%93.5%95.3%92.8%94.9%94.3%99.4%34.1%39.2%74.7%79.8%70.2%78.6%80.9%83.3%91.6%93.6%90.1%92.6%92.4%99.0%15.1%17.3%25.3%54.5%44.5%53.0%58.4%61.0%79.2%82.1%75.9%80.9%80.5%97.3%13.4%18.0%20.2%45.5%39.8%48.7%55.6%58.2%77.8%80.0%71.9%78.1%79.2%96.8%13.4%16.8%29.8%55.5%60.2%58.6%64.3%66.2%82.5%85.8%79.7%84.4%84.2%97.9%11.6%16.7%21.4%47.0%51.3%41.4%55.8%58.0%77.4%80.3%73.7%79.6%78.2%97.0%11.0%13.7%19.1%41.6%44.4%35.7%44.2%52.2%73.5%76.5%70.4%74.9%74.9%96.3%10.5%12.3%16.7%39.0%41.8%33.8%42.0%47.8%71.3%75.5%66.3%73.1%72.3%95.9%4.9%6.5%8.4%20.8%22.2%17.5%22.6%26.5%28.7%54.3%44.3%51.9%53.9%90.6%4.1%4.7%6.4%17.9%20.0%14.2%19.7%23.5%24.5%45.7%39.7%48.1%47.0%88.9%5.0%7.2%9.9%24.1%28.1%20.3%26.3%29.6%33.7%55.7%60.3%57.3%57.2%92.4%4.5%5.1%7.4%19.1%21.9%15.6%20.4%25.1%26.9%48.1%51.9%42.7%49.4%89.8%4.8%5.7%7.6%19.5%20.8%15.8%21.8%25.1%27.7%46.1%53.0%42.8%50.6%90.1%0.5%0.6%1.0%2.7%3.2%2.1%3.0%3.7%4.1%9.4%11.1%7.6%10.2%9.9%

First Alternate

For every pair of candidates, this table shows the fraction of voters who ranked one candidate first ranked the other candidate second.

Second ChoiceFirst ChoiceJane KimDebra WalkerTheresa SparksJames KeysMatt DrakeGlendon ''Anna Conda'' HydeElaine ZamoraDean ClarkJim MekoGeorge VazhappallyMatt AsheH. BrownGeorge DavisFortunate ''Nate'' PayneWrite-inJane KimDebra WalkerTheresa SparksJames KeysMatt DrakeGlendon ''Anna Conda'' HydeElaine ZamoraDean ClarkJim MekoGeorge VazhappallyMatt AsheH. BrownGeorge DavisFortunate ''Nate'' PayneWrite-inExhausted Ballot22.2%15.3%4.5%3.8%6.9%5.8%3.1%2.4%0.8%0.8%2.2%0.8%0.6%0.1%30.8%36.8%13.2%5.4%0.9%5.0%3.2%2.8%2.9%0.4%0.7%1.1%0.8%0.6%0.2%25.8%21.4%16.0%3.7%8.7%4.6%4.2%2.0%4.0%0.9%0.9%1.3%0.9%1.0%0.1%30.2%25.2%21.8%10.8%1.4%4.5%2.5%3.1%4.1%0.9%0.3%1.0%1.3%0.9%0.1%22.1%16.3%5.9%14.7%1.4%1.8%7.3%7.9%9.6%4.5%2.1%0.5%2.0%4.8%0.1%21.1%18.2%27.5%10.7%6.4%1.7%2.9%2.7%3.2%0.7%1.6%2.5%2.6%3.9%0.3%15.2%16.8%12.9%12.4%5.7%7.5%3.6%4.1%3.0%1.4%1.3%1.9%2.7%1.1%0.2%25.6%14.3%20.4%7.0%8.0%5.6%2.2%3.0%1.5%4.7%1.2%6.5%1.2%2.3%0.2%22.1%17.0%16.7%9.3%9.3%6.1%3.9%3.2%1.7%4.2%2.5%0.7%2.7%3.2%0.2%19.2%8.3%4.5%5.4%1.7%10.3%1.7%6.2%6.2%9.5%1.2%2.5%2.1%23.6%0.0%16.9%14.6%13.0%9.2%2.2%12.4%8.1%4.3%3.2%5.4%1.6%2.2%7.0%1.1%0.5%15.1%12.1%8.8%6.0%6.6%3.8%3.3%7.1%15.4%5.5%3.3%2.7%2.7%1.6%0.5%20.3%7.0%16.5%5.7%5.1%4.4%8.2%5.7%7.0%2.5%5.1%1.9%7.0%2.5%0.0%21.5%8.0%12.7%4.0%4.0%5.3%10.7%2.0%6.7%8.7%12.7%1.3%2.7%1.3%0.7%19.3%6.9%3.4%0.0%0.0%0.0%3.4%0.0%0.0%0.0%0.0%3.4%0.0%0.0%0.0%82.8%

Final-round vote by First vote

For each candidate who was eliminated before the final round, this table shows which final-round candidate the eliminated candidate's first-round ballots went to.

Final Round ChoiceFirst ChoiceTheresa SparksJames KeysMatt DrakeGlendon ''Anna Conda'' HydeElaine ZamoraDean ClarkJim MekoGeorge VazhappallyMatt AsheH. BrownGeorge DavisFortunate ''Nate'' PayneWrite-inJane KimDebra WalkerExhausted Ballot27.5%20.4%52.1%30.2%26.9%42.9%27.0%9.5%63.5%25.1%37.1%37.7%25.7%17.3%57.0%20.3%24.9%54.8%24.8%26.5%48.6%12.0%8.3%79.8%21.1%18.9%60.0%20.3%14.8%64.8%11.4%23.4%65.2%13.3%20.7%66.0%6.9%3.4%89.7%

Honest Approval Set

Another voting system is Approval Voting, which involves indicating one or more candidates you approve of without ranking them. The candidate with the most voters who approve of them wins. It is impossible to know how voters would vote on an approval ballot based on their ranked ballot, but two reasonable assumptions we can narrow down the set of possibe approval ballots. With these possible approval ballots, we can determine which candidates would have had a chance of winning under an approval voting system.

The assumptions we make are:

  • Every voter who ranked at least one candidate would have voted for at least one candidate in an approval vote.
  • Every voter’s approval votes would be consistent with their ranked ballot, that is, they would not vote for a candidate unless they also voted for every candidate who appeared above that candidate on their ranked ballot.

The table below shows the maximum vote margin each candidate could have received (over the next best candidate) in an approval system, subject to these assumptions.

CandidateMost Favorable Scenario
Jane KimWins 11,978 to 6,112
Debra WalkerWins 10,217 to 7,077
Theresa SparksWins 7,556 to 7,089
James KeysLoses 6,850 to 2,890
Matt DrakeLoses 6,781 to 2,417
Glendon ''Anna Conda'' HydeLoses 7,609 to 3,642
Elaine ZamoraLoses 6,831 to 2,577
Dean ClarkLoses 6,752 to 2,064
Jim MekoLoses 6,775 to 1,902
George VazhappallyLoses 6,655 to 787
Matt AsheLoses 6,663 to 652
H. BrownLoses 6,682 to 978
George DavisLoses 6,659 to 725
Fortunate ''Nate'' PayneLoses 6,655 to 739
Write-inLoses 6,626 to 82

Meta

NameSan Francisco 2010 Municipal Election - District 6
Date2010-11-02
Total Ballots25,057
Input Formatus_ca_sfo
Tabulation Methodeager_irv
Normalized Ballot Dataus/ca/sfo/2010/11/d6/us_ca_sfo_2010_11_d6.normalized.csv.gz

Raw Input Data

File NameSHA-1
us/ca/sfo/2010/11/MasterLookup-D6.txtb10fed89fabb544fdc0d5cae907c2921d6a21c0f
us/ca/sfo/2010/11/BallotImage-D6.txtbbbd670db2c583dda13fb4d314902b94b2b08936
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Created by Paul Butler. The content on this page may be reproduced freely under the terms of the CC BY license.