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Assessor-Recorder (SanFrancisco; 2018-11-06)

🔗 2018-11-06_SanFrancisco-Assessor-Recorder     (tags: { from-bolson , actual , 2018 , 2018-11 , SF , SanFrancisco_CA , SanFrancisco-2018 , CA })

Below is the ABIF from the "2018-11-06_SanFrancisco-Assessor-Recorder" election (Assessor-Recorder (SanFrancisco; 2018-11-06))

ABIF submission area (show)
Method options
Ballot options

Voting methods: IRV • FPTP • approval • STAR • Pairwise • All methods

Results

🔗https://abif.electorama.com/id/2018-11-06_SanFrancisco-Assessor-Recorder

Below are the results of the election represented above using various election methods with abiftool/abiflib. The detected ballot type from the ABIF above is "ranked". Some methods may transform these ballots for analysis; see method notices for details. Resubmit the ABIF with "Transform ballots" turned off to minimize the transformations.

Method Winner
IRV/RCV CARMEN CHU
FPTP CARMEN CHU
Approval CARMEN CHU
STAR CARMEN CHU
Condorcet/Copeland CARMEN CHU
Election results summary showing voting method winners
click/tap to expand
tabbed view

IRV/RCV results

2018-11-06_SanFrancisco-Assessor-Recorder IRV/RCV result permalink:
🔗https://abif.electorama.com/id/2018-11-06_SanFrancisco-Assessor-Recorder/IRV#IRV

  • IRV/RCV Winner: CARMEN CHU with 232,577 votes (63.1%) in final round
  • Runner-up: PAUL BELLAR with 84,763 votes (23.0%) in final round
  • Exhausted ballots in final round: 51,238 (13.9%)
  • Number of rounds: 1
  • Ballots counted in final round: 317,340 (86.1%)
  • Majority of ballots: 184,290 (50.0%)
  • Total ballots: 368,578
Round 1
Overview:
Active ballots: 368,578 (100.0%)

Exhausted ballots: 51,238 (13.9%)
Counted ballots: 317,340 (86.1%)
Winning threshold: 158,671 (43.05%)
IRV/RCV winner:
CARMEN CHU: 232,577 (63.1%)✅
→
PAUL BELLAR: 84,763 (23.0%) (🛑eliminated)
→

FPTP result

"FPTP" is "First-past-the-post", also known as "plurality" or "choose-one"
2018-11-06_SanFrancisco-Assessor-Recorder FPTP results permalink:
🔗https://abif.electorama.com/id/2018-11-06_SanFrancisco-Assessor-Recorder/FPTP#FPTP
📝
Note — Only using first-choices on ranked ballots

  • FPTP Winner: CARMEN CHU with 232,577 first-place votes (63.1%)
  • Runner-up: PAUL BELLAR with 84,763 first-place votes (23.0%)
  • Margin of victory: 147,814 votes (40.1 percentage points)
  • First-place votes
    • CARMEN CHU: 232,577 votes (63.1 %)
    • PAUL BELLAR: 84,763 votes (23.0 %)
  • Blanks: 51,238 (13.9 %)
  • Total ballots: 368,578

Approval voting results

2018-11-06_SanFrancisco-Assessor-Recorder approval voting results permalink:
🔗https://abif.electorama.com/id/2018-11-06_SanFrancisco-Assessor-Recorder/approval#approval
📝
Note — Approval counts estimated from 368,578 ranked ballots using favorite_viable_half method
Details

The 'favorite_viable_half' conversion algorithm: find the candidate with the most first preferences, and then determine the minimum number of figurative seats that would need to be open in order for the candidate to exceed the Hare quota with the given first-prefs. We use this to estimate how many candidates are likely to be viable candidates.

Using first-choice vote totals as a rough guide, approximately 2 candidates appear viable: CARMEN CHU and PAUL BELLAR. The approximation then assumes each voter approves up to 1 of their top-ranked viable candidates (half of 2). All candidates ranked at or above the lowest-ranked of each ballot's top viable candidates receive approval (considering up to 1 viable candidates per ballot).

See transformed ballots

Note: For Approval, these choose_many ballots are inferred from ranked ballots.

Conversion method: favorite_viable_half

#------- metadata -------
{ballotcount: 368578}
{version: "0.1"}
{ballotcount_abif_metadata: "368578"}
{is_ranking_to_rating: true}
#------ candlines ------
=[CARMEN CHU]:[CARMEN CHU]
=[PAUL BELLAR]:[PAUL BELLAR]
#------- votelines ------
98232:[CARMEN CHU]/1
83106:[CARMEN CHU]/1
35369:[CARMEN CHU]/1
32427:[PAUL BELLAR]/1
27788:[PAUL BELLAR]/1
12124:[PAUL BELLAR]/1
8624:[PAUL BELLAR]/1
6744:[CARMEN CHU]/1
4738:[CARMEN CHU]/1
4388:[CARMEN CHU]/1
2230:[PAUL BELLAR]/1
1570:[PAUL BELLAR]/1
  • Approval Winner: CARMEN CHU
  • Approval Results:
    • CARMEN CHU — 232,577 approvals (63.1% of ballots) (✅ winner)
    • PAUL BELLAR — 84,763 approvals (23.0% of ballots)
  • Total: 368,578 ballots (317,340 total approvals)

STAR results

2018-11-06_SanFrancisco-Assessor-Recorder STAR results permalink:
🔗https://abif.electorama.com/id/2018-11-06_SanFrancisco-Assessor-Recorder/STAR#STAR
📝
Note — STAR ratings estimated from ranked ballots using Borda scoring method
Details

The ranked ballots have been converted to STAR ratings using Borda scoring: each candidate receives points equal to (number_of_candidates - their_rank). In this election, we have 2 candidates, so the 1st choice gets 1 points, the 2nd choice gets 0 points, etc. These Borda scores are then used as STAR ratings for tabulation by STAR.

  • STAR winner: CARMEN CHU
  • Finalists: CARMEN CHU vs PAUL BELLAR
  • Runoff result:
    • CARMEN CHU: 232,577 votes (63.1%)
    • PAUL BELLAR: 84,763 votes (23.0%)
    • No preference: 51238 voters (13.9%)
  • Total stars allocated: 317,340
  • Total ballots: 368,578
★★★★★★

★★★★★

★★★★★★
★★★★★
★★★★★★
★★★★★
★★★★★★
★★★★★
★★★★★★
(one star above is approximately 6,347 stars allocated by voters)
  • First round:
    • ★#0: CARMEN CHU received 232,577 stars (73.3%) from 232,577 voters (63.1%)
    • ★#1: PAUL BELLAR received 84,763 stars (26.7%) from 84,763 voters (23.0%)
  • Finalists:
    • ★CARMEN CHU (✅ winner) preferred by 232,577 of 368,578 voters
    • ★PAUL BELLAR preferred by 84,763 of 368,578 voters
    • ★No preference between the finalists: 51238

NOTE: Since ratings or stars are not present in the provided ballots, allocated stars are estimated using a Borda-like formula.

Condorcet/Copeland results

2018-11-06_SanFrancisco-Assessor-Recorder Condorcet/Copeland results permalink:
🔗https://abif.electorama.com/id/2018-11-06_SanFrancisco-Assessor-Recorder/pairwise#pairwise
  • Winner: CARMEN CHU
  • Runner-up: PAUL BELLAR (beats all other candidates except CARMEN CHU)
  • Smallest margin: CARMEN CHU over PAUL BELLAR (232,577-84,763; margin: 147,814)
  • Largest margin: CARMEN CHU over PAUL BELLAR (232,577-84,763; margin: 147,814)
  • Pairwise ties: none
  • Total ballots: 368,578

Win-loss-tie (Condorcet/Copeland) table

2018-11-06_SanFrancisco-Assessor-Recorder w-l-t table permalink:
🔗https://abif.electorama.com/id/2018-11-06_SanFrancisco-Assessor-Recorder/pairwise#wlt
Assessor-Recorder (SanFrancisco; 2018-11-06) pairwise matchups
CARMEN CHU
(1-0-0)
CARMEN CHU
1 victory ⇣
PAUL BELLAR
(0-1-0)
CARMEN CHU: 232,577(63.1%)
PAUL BELLAR: 84,763(23.0%)
(No preference: 51,238; 13.9%)

Pairwise tournament (Copeland ordered)

2018-11-06_SanFrancisco-Assessor-Recorder pairwise diagram permalink:
🔗https://abif.electorama.com/id/2018-11-06_SanFrancisco-Assessor-Recorder/pairwise#dot

%3 CARMEN CHU CARMEN CHU 1-0-0 (1 wins, 0 losses, 0 ties) PAUL BELLAR PAUL BELLAR 0-1-0 CARMEN CHU->PAUL BELLAR ← CARMEN CHU: 232577 PAUL BELLAR: 84763

Voting methods: IRV • FPTP • approval • STAR • Pairwise • All methods

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