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d8 (san_francisco; 2010)

πŸ”— 2010_san_francisco-d8     (tags: { from-bolson , actual , 2010 , san_francisco-2010 , SF , SanFrancisco_CA , CA })

Below is the ABIF from the "2010_san_francisco-d8" election (d8 (san_francisco; 2010))

ABIF submission area (show)
Method options
Ballot options

Voting methods: IRV β€’ FPTP β€’ approval β€’ STAR β€’ Pairwise β€’ All methods

Results

πŸ”—https://abif.electorama.com/id/2010_san_francisco-d8

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 SCOTT WIENER
FPTP SCOTT WIENER
Approval SCOTT WIENER
STAR SCOTT WIENER
Condorcet/Copeland SCOTT WIENER
Election results summary showing voting method winners
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tabbed view

IRV/RCV results

2010_san_francisco-d8 IRV/RCV result permalink:
πŸ”—https://abif.electorama.com/id/2010_san_francisco-d8/IRV#IRV

  • IRV/RCV Winner: SCOTT WIENER with 16,456 votes (48.6%) in final round
  • Runner-up: RAFAEL MANDELMAN with 13,023 votes (38.5%) in final round
  • Exhausted ballots in final round: 4,352 (12.9%)
  • Number of rounds: 5
  • Ballots counted in final round: 29,479 (87.1%)
  • Majority of ballots: 16,916 (50.0%)
  • Total ballots: 33,831
Round 1 Round 2 Round 3 Round 4 Round 5
Overview:
Active ballots: 33,831 (100.0%)

Exhausted ballots: 0 (0.0%)
Counted ballots: 33,831 (100.0%)
Overview:
Active ballots: 33,831 (100.0%)

Exhausted ballots: 0 (0.0%)
Counted ballots: 33,831 (100.0%)
Overview:
Active ballots: 33,831 (100.0%)

Exhausted ballots: 255 (0.8%)
Counted ballots: 33,576 (99.2%)
Winning threshold: 16,789 (49.63%)
Overview:
Active ballots: 33,831 (100.0%)

Exhausted ballots: 3,140 (9.3%)
Counted ballots: 30,691 (90.7%)
Winning threshold: 15,346 (45.36%)
Overview:
Active ballots: 33,831 (100.0%)

Exhausted ballots: 4,352 (12.9%)
Counted ballots: 29,479 (87.1%)
Winning threshold: 14,740 (43.57%)
SCOTT WIENER: 13,274 (39.2%)
β†’
SCOTT WIENER: 13,274 (39.2%)
β†’
SCOTT WIENER: 13,845 (40.9%)
β†’
SCOTT WIENER: 13,861 (41.0%)
β†’
IRV/RCV winner:
SCOTT WIENER: 16,456 (48.6%)βœ…
β†’
RAFAEL MANDELMAN: 10,902 (32.2%)
β†’
RAFAEL MANDELMAN: 10,902 (32.2%)
β†’
RAFAEL MANDELMAN: 11,098 (32.8%)
β†’
RAFAEL MANDELMAN: 11,120 (32.9%)
β†’
RAFAEL MANDELMAN: 13,023 (38.5%) (πŸ›‘eliminated)
β†’
REBECCA PROZAN: 5,391 (15.9%)
β†’
REBECCA PROZAN: 5,391 (15.9%)
β†’
REBECCA PROZAN: 5,696 (16.8%)
β†’
REBECCA PROZAN: 5,710 (16.9%) (πŸ›‘eliminated)
β†’
REBECCA PROZAN
0000000: 2,627 (7.8%)
β†’
0000000: 2,627 (7.8%)
β†’
0000000: 2,937 (8.7%) (πŸ›‘eliminated)
β†’
0000000 0000000
BILL HEMENGER: 1,637 (4.8%)
β†’
BILL HEMENGER: 1,637 (4.8%) (πŸ›‘eliminated)
β†’
BILL HEMENGER BILL HEMENGER BILL HEMENGER
WRITE-IN WRITE-IN WRITE-IN WRITE-IN WRITE-IN

FPTP result

"FPTP" is "First-past-the-post", also known as "plurality" or "choose-one"
2010_san_francisco-d8 FPTP results permalink:
πŸ”—https://abif.electorama.com/id/2010_san_francisco-d8/FPTP#FPTP
πŸ“
Note β€” Only using first-choices on ranked ballots

  • FPTP Winner: SCOTT WIENER with 13,274 first-place votes (39.2%)
  • Runner-up: RAFAEL MANDELMAN with 10,902 first-place votes (32.2%)
  • Margin of victory: 2,372 votes (7.0 percentage points)
  • First-place votes
    • SCOTT WIENER: 13,274 votes (39.2 %)
    • RAFAEL MANDELMAN: 10,902 votes (32.2 %)
    • REBECCA PROZAN: 5,391 votes (15.9 %)
    • 0000000: 2,627 votes (7.8 %)
    • BILL HEMENGER: 1,637 votes (4.8 %)
    • WRITE-IN: 0 votes (0.0 %)
  • Total ballots: 33,831

Approval voting results

2010_san_francisco-d8 approval voting results permalink:
πŸ”—https://abif.electorama.com/id/2010_san_francisco-d8/approval#approval
πŸ“
Note β€” Approval counts estimated from 33,831 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 3 candidates appear viable: SCOTT WIENER, RAFAEL MANDELMAN, and REBECCA PROZAN. The approximation then assumes each voter approves up to 2 of their top-ranked viable candidates (half of 3, rounded up). All candidates ranked at or above the lowest-ranked of each ballot's top viable candidates receive approval (considering up to 2 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: 33831}
{version: "0.1"}
{ballotcount_abif_metadata: "33831"}
{is_ranking_to_rating: true}
#------ candlines ------
=WRITE-IN:[WRITE-IN]
=[0000000]:[0000000]
=[SCOTT WIENER]:[SCOTT WIENER]
=[REBECCA PROZAN]:[REBECCA PROZAN]
=[RAFAEL MANDELMAN]:[RAFAEL MANDELMAN]
=[BILL HEMENGER]:[BILL HEMENGER]
#------- votelines ------
2557:[REBECCA PROZAN]/1=[SCOTT WIENER]/1
2331:[RAFAEL MANDELMAN]/1
2268:[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
2078:[SCOTT WIENER]/1
1888:[REBECCA PROZAN]/1=[SCOTT WIENER]/1
1714:[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
1636:[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
1624:[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
1438:[REBECCA PROZAN]/1=[SCOTT WIENER]/1
1303:[SCOTT WIENER]/1
1240:[RAFAEL MANDELMAN]/1
1135:[REBECCA PROZAN]/1=[SCOTT WIENER]/1
990:[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
596:[REBECCA PROZAN]/1=[SCOTT WIENER]/1
571:[BILL HEMENGER]/1=[REBECCA PROZAN]/1=[SCOTT WIENER]/1
563:[REBECCA PROZAN]/1
505:[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
499:[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
448:[REBECCA PROZAN]/1
428:[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
395:[REBECCA PROZAN]/1=[SCOTT WIENER]/1
389:[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
340:[SCOTT WIENER]/1
298:[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
288:[BILL HEMENGER]/1=[REBECCA PROZAN]/1=[SCOTT WIENER]/1
185:[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
184:[BILL HEMENGER]/1=[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
162:[BILL HEMENGER]/1=[REBECCA PROZAN]/1=[SCOTT WIENER]/1
160:[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
157:[REBECCA PROZAN]/1=[SCOTT WIENER]/1
155:[BILL HEMENGER]/1=[SCOTT WIENER]/1
150:[REBECCA PROZAN]/1=[SCOTT WIENER]/1
143:[BILL HEMENGER]/1=[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
132:[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
128:[BILL HEMENGER]/1=[REBECCA PROZAN]/1=[SCOTT WIENER]/1
122:[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
115:[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
106:[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
89:[BILL HEMENGER]/1=[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
81:[BILL HEMENGER]/1=[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
80:[BILL HEMENGER]/1=[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
77:[REBECCA PROZAN]/1
73:[BILL HEMENGER]/1=[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
73:[BILL HEMENGER]/1=[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
66:[BILL HEMENGER]/1=[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
62:[BILL HEMENGER]/1=[REBECCA PROZAN]/1
61:[RAFAEL MANDELMAN]/1
55:[RAFAEL MANDELMAN]/1
48:[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
46:[SCOTT WIENER]/1
41:[REBECCA PROZAN]/1=[SCOTT WIENER]/1
37:[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
34:[BILL HEMENGER]/1=[RAFAEL MANDELMAN]/1
33:[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
32:[SCOTT WIENER]/1
31:[BILL HEMENGER]/1=[SCOTT WIENER]/1
25:[REBECCA PROZAN]/1
23:[SCOTT WIENER]/1
21:[REBECCA PROZAN]/1=[SCOTT WIENER]/1
15:[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
14:[0000000]/1=[RAFAEL MANDELMAN]/1
12:[BILL HEMENGER]/1=[REBECCA PROZAN]/1
12:[0000000]/1=[SCOTT WIENER]/1
11:[BILL HEMENGER]/1=[RAFAEL MANDELMAN]/1
9:[0000000]/1=[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
8:[BILL HEMENGER]/1=[SCOTT WIENER]/1
8:[RAFAEL MANDELMAN]/1
8:[REBECCA PROZAN]/1
8:[SCOTT WIENER]/1
7:[0000000]/1=[REBECCA PROZAN]/1=[SCOTT WIENER]/1
6:[0000000]/1=[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
6:[0000000]/1=[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
5:[RAFAEL MANDELMAN]/1
5:[BILL HEMENGER]/1=[RAFAEL MANDELMAN]/1
5:[0000000]/1=[REBECCA PROZAN]/1=[SCOTT WIENER]/1
4:[RAFAEL MANDELMAN]/1
4:[REBECCA PROZAN]/1
3:[0000000]/1=[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
3:[0000000]/1=[REBECCA PROZAN]/1=[SCOTT WIENER]/1
3:[0000000]/1=[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
3:[0000000]/1=[REBECCA PROZAN]/1
3:[BILL HEMENGER]/1=[REBECCA PROZAN]/1
3:[0000000]/1=[RAFAEL MANDELMAN]/1
3:[0000000]/1=[RAFAEL MANDELMAN]/1=[REBECCA PROZAN]/1
2:[0000000]/1=[BILL HEMENGER]/1=[REBECCA PROZAN]/1
2:[0000000]/1=[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
2:[REBECCA PROZAN]/1
2:[0000000]/1=[REBECCA PROZAN]/1=[SCOTT WIENER]/1
1:[0000000]/1=[SCOTT WIENER]/1
1:[0000000]/1=[RAFAEL MANDELMAN]/1=[SCOTT WIENER]/1
1:[0000000]/1=[REBECCA PROZAN]/1
1:[0000000]/1=[BILL HEMENGER]/1=[REBECCA PROZAN]/1
1:[RAFAEL MANDELMAN]/1
1:[0000000]/1=[REBECCA PROZAN]/1
  • Approval Winner: SCOTT WIENER
  • Approval Results:
    • SCOTT WIENER — 19,054 approvals (56.32% of ballots) (βœ… winner)
    • REBECCA PROZAN — 17,409 approvals (51.46% of ballots)
    • RAFAEL MANDELMAN — 15,898 approvals (46.99% of ballots)
    • BILL HEMENGER — 2,262 approvals (6.69% of ballots)
    • 0000000 — 88 approvals (0.26% of ballots)
  • Total: 33,831 ballots (54,711 total approvals)

STAR results

2010_san_francisco-d8 STAR results permalink:
πŸ”—https://abif.electorama.com/id/2010_san_francisco-d8/STAR#STAR
πŸ“
Note β€” 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 6 candidates, so the 1st choice gets 5 points, the 2nd choice gets 4 points, etc. These Borda scores are then used as STAR ratings for tabulation by STAR.

  • STAR winner: SCOTT WIENER
  • Finalists: SCOTT WIENER vs RAFAEL MANDELMAN
  • Runoff result:
    • SCOTT WIENER: 16,456 votes (48.6%)
    • RAFAEL MANDELMAN: 13,023 votes (38.5%)
    • No preference: 4352 voters (12.9%)
  • Total stars allocated: 345,523
  • Total ballots: 33,831
β˜…β˜…β˜…β˜…β˜…β˜…

β˜…β˜…β˜…β˜…β˜…

β˜…β˜…β˜…β˜…β˜…β˜…
β˜…β˜…β˜…β˜…β˜…
β˜…β˜…β˜…β˜…β˜…β˜…
β˜…β˜…β˜…β˜…β˜…
β˜…β˜…β˜…β˜…β˜…β˜…
β˜…β˜…β˜…β˜…β˜…
β˜…β˜…β˜…β˜…β˜…β˜…
(one star above is approximately 6,910 stars allocated by voters)
  • First round:
    • β˜…#0: SCOTT WIENER received 98,805 stars (28.6%) from 22,312 voters (66.0%)
    • β˜…#1: RAFAEL MANDELMAN received 85,134 stars (24.6%) from 19,590 voters (57.9%)
    • β˜…#2: REBECCA PROZAN received 83,711 stars (24.2%) from 20,669 voters (61.1%)
    • β˜…#3: 0000000 received 54,044 stars (15.6%) from 14,444 voters (42.7%)
    • β˜…#4: BILL HEMENGER received 23,825 stars (6.9%) from 6,267 voters (18.5%)
    • β˜…#5: WRITE-IN received 4 stars (0.0%) from 1 voters (0.0%)
  • Finalists:
    • β˜…SCOTT WIENER (βœ… winner) preferred by 16,456 of 33,831 voters
    • β˜…RAFAEL MANDELMAN preferred by 13,023 of 33,831 voters
    • β˜…No preference between the finalists: 4352

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

Condorcet/Copeland results

2010_san_francisco-d8 Condorcet/Copeland results permalink:
πŸ”—https://abif.electorama.com/id/2010_san_francisco-d8/pairwise#pairwise
  • Winner: SCOTT WIENER
  • Runner-up: RAFAEL MANDELMAN (beats all other candidates except SCOTT WIENER)
  • Smallest margin: BILL HEMENGER over WRITE-IN (6,267-1; margin: 6,266)
  • Largest margin: SCOTT WIENER over WRITE-IN (22,312-1; margin: 22,311)
  • Pairwise ties: none
  • Total ballots: 33,831

Win-loss-tie (Condorcet/Copeland) table

2010_san_francisco-d8 w-l-t table permalink:
πŸ”—https://abif.electorama.com/id/2010_san_francisco-d8/pairwise#wlt
d8 (san_francisco; 2010) pairwise matchups
SCOTT WIENER
(5-0-0)
SCOTT WIENER
5 victories ⇣
RAFAEL MANDELMAN
(4-1-0)
SCOTT WIENER: 16,456(48.6%)
RAFAEL MANDELMAN: 13,023(38.5%)
(No preference: 4,352; 12.9%)
RAFAEL MANDELMAN
⇽ 1 loss / 4 victories† ⇣
REBECCA PROZAN
(3-2-0)
SCOTT WIENER: 16,459(48.7%)
REBECCA PROZAN: 10,460(30.9%)
(No preference: 6,912; 20.4%)
RAFAEL MANDELMAN: 13,995(41.4%)
REBECCA PROZAN: 12,659(37.4%)
(No preference: 7,177; 21.2%)
REBECCA PROZAN
⇽ 2 losses / 3 victories† ⇣
0000000
(2-3-0)
SCOTT WIENER: 22,280(65.9%)
0000000: 8,313(24.6%)
(No preference: 3,238; 9.6%)
RAFAEL MANDELMAN: 19,552(57.8%)
0000000: 8,801(26.0%)
(No preference: 5,478; 16.2%)
REBECCA PROZAN: 20,637(61.0%)
0000000: 9,081(26.8%)
(No preference: 4,113; 12.2%)
0000000
⇽ 3 losses / 2 victories† ⇣
BILL HEMENGER
(1-4-0)
SCOTT WIENER: 21,298(63.0%)
BILL HEMENGER: 2,818(8.3%)
(No preference: 9,715; 28.7%)
RAFAEL MANDELMAN: 18,974(56.1%)
BILL HEMENGER: 4,934(14.6%)
(No preference: 9,923; 29.3%)
REBECCA PROZAN: 19,286(57.0%)
BILL HEMENGER: 3,559(10.5%)
(No preference: 10,986; 32.5%)
0000000: 13,405(39.6%)
BILL HEMENGER: 6,247(18.5%)
(No preference: 14,179; 41.9%)
BILL HEMENGER
⇽ 4 losses / 1 victory† ⇣
WRITE-IN
(0-5-0)
SCOTT WIENER: 22,312(66.0%)
WRITE-IN: 1(0.0%)
(No preference: 11,518; 34.0%)
RAFAEL MANDELMAN: 19,590(57.9%)
WRITE-IN: 0(0.0%)
(No preference: 14,241; 42.1%)
REBECCA PROZAN: 20,669(61.1%)
WRITE-IN: 1(0.0%)
(No preference: 13,161; 38.9%)
0000000: 14,444(42.7%)
WRITE-IN: 1(0.0%)
(No preference: 19,386; 57.3%)
BILL HEMENGER: 6,267(18.5%)
WRITE-IN: 1(0.0%)
(No preference: 27,563; 81.5%)

Pairwise tournament (Copeland ordered)

2010_san_francisco-d8 pairwise diagram permalink:
πŸ”—https://abif.electorama.com/id/2010_san_francisco-d8/pairwise#dot

%3 SCOTT WIENER SCOTT WIENER 5-0-0 (5 wins, 0 losses, 0 ties) RAFAEL MANDELMAN RAFAEL MANDELMAN 4-1-0 SCOTT WIENER->RAFAEL MANDELMAN ← SCOTT WIENER: 16456 RAFAEL MANDELMAN: 13023 REBECCA PROZAN REBECCA PROZAN 3-2-0 SCOTT WIENER->REBECCA PROZAN ← SCOTT WIENER: 16459 REBECCA PROZAN: 10460 0000000 0000000 2-3-0 SCOTT WIENER->0000000 ← SCOTT WIENER: 22280 0000000: 8313 BILL HEMENGER BILL HEMENGER 1-4-0 SCOTT WIENER->BILL HEMENGER ← SCOTT WIENER: 21298 BILL HEMENGER: 2818 WRITE-IN WRITE-IN 0-5-0 SCOTT WIENER->WRITE-IN ← SCOTT WIENER: 22312 WRITE-IN: 1 RAFAEL MANDELMAN->REBECCA PROZAN ← RAFAEL MANDELMAN: 13995 REBECCA PROZAN: 12659 RAFAEL MANDELMAN->0000000 ← RAFAEL MANDELMAN: 19552 0000000: 8801 RAFAEL MANDELMAN->BILL HEMENGER ← RAFAEL MANDELMAN: 18974 BILL HEMENGER: 4934 RAFAEL MANDELMAN->WRITE-IN ← RAFAEL MANDELMAN: 19590 WRITE-IN: 0 REBECCA PROZAN->0000000 ← REBECCA PROZAN: 20637 0000000: 9081 REBECCA PROZAN->BILL HEMENGER ← REBECCA PROZAN: 19286 BILL HEMENGER: 3559 REBECCA PROZAN->WRITE-IN ← REBECCA PROZAN: 20669 WRITE-IN: 1 0000000->BILL HEMENGER ← 0000000: 13405 BILL HEMENGER: 6247 0000000->WRITE-IN ← 0000000: 14444 WRITE-IN: 1 BILL HEMENGER->WRITE-IN ← BILL HEMENGER: 6267 WRITE-IN: 1

Voting methods: IRV β€’ FPTP β€’ approval β€’ STAR β€’ Pairwise β€’ All methods

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