The **San Francisco 2010 Municipal Election - District 8** took place on **2010-11-02**. **Scott Wiener** won after **two** runoff rounds, and was also the Condorcet winner.

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.

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.

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

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.

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 voterâ€™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.

Candidate | Most Favorable Scenario | |
---|---|---|

Scott Wiener | Wins 24,843 to 13,617 | |

Rafael Mandelman | Wins 22,031 to 16,161 | |

Rebecca Prozan | Wins 23,105 to 16,959 | |

Bill Hemenger | Loses 15,444 to 7,048 | |

Write-in | Loses 14,828 to 176 |

Name | San Francisco 2010 Municipal Election - District 8 |

Date | 2010-11-02 |

Total Ballots | 38,551 |

Input Format | us_ca_sfo |

Tabulation Method | eager_irv |

Normalized Ballot Data | us/ca/sfo/2010/11/d8/us_ca_sfo_2010_11_d8.normalized.csv.gz |

File Name | SHA-1 |
---|---|

us/ca/sfo/2010/11/MasterLookup-D8.txt | ff3686d5fc8c1d05320fac925038c92b0a5301e4 |

us/ca/sfo/2010/11/BallotImage-D8.txt | 2d4bcc45600ba662aa50ae53c7acf540babf8991 |

Created by Paul Butler. The content on this page may be reproduced freely under the terms of the CC BY license.