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Sheriff (SanFrancisco; 2015-11-03)

🔗 2015-11-03_SanFrancisco-Sheriff     (tags: { from-bolson , actual , 2015 , 2015-11 , SF , SanFrancisco_CA , CA , SanFrancisco-2015 })

Below is the ABIF from the "2015-11-03_SanFrancisco-Sheriff" election (Sheriff (SanFrancisco; 2015-11-03))

ABIF submission area (show)
Method options
Ballot options

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

Results

🔗https://abif.electorama.com/id/2015-11-03_SanFrancisco-Sheriff

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 VICKI HENNESSY
FPTP VICKI HENNESSY
Approval VICKI HENNESSY
STAR VICKI HENNESSY
Condorcet/Copeland VICKI HENNESSY
Election results summary showing voting method winners
click/tap to expand
tabbed view

IRV/RCV results

2015-11-03_SanFrancisco-Sheriff IRV/RCV result permalink:
🔗https://abif.electorama.com/id/2015-11-03_SanFrancisco-Sheriff/IRV#IRV

  • IRV/RCV Winner: VICKI HENNESSY with 112,783 votes (55.5%) in final round
  • Runner-up: ROSS MIRKARIMI with 61,281 votes (30.2%) in final round
  • Exhausted ballots in final round: 17,158 (8.4%)
  • Number of rounds: 1
  • Ballots counted in final round: 185,911 (91.6%)
  • Majority of ballots: 101,535 (50.0%)
  • Total ballots: 203,069
Round 1
Overview:
Active ballots: 203,069 (100.0%)

Exhausted ballots: 17,158 (8.4%)
Counted ballots: 185,911 (91.6%)
Winning threshold: 92,956 (45.78%)
IRV/RCV winner:
VICKI HENNESSY: 112,783 (55.5%)✅
→
ROSS MIRKARIMI: 61,281 (30.2%) (🛑eliminated)
→
JOHN ROBINSON: 11,847 (5.8%) (🛑eliminated)
→

FPTP result

"FPTP" is "First-past-the-post", also known as "plurality" or "choose-one"
2015-11-03_SanFrancisco-Sheriff FPTP results permalink:
🔗https://abif.electorama.com/id/2015-11-03_SanFrancisco-Sheriff/FPTP#FPTP
📝
Note — Only using first-choices on ranked ballots

  • FPTP Winner: VICKI HENNESSY with 112,783 first-place votes (55.5%)
  • Runner-up: ROSS MIRKARIMI with 61,281 first-place votes (30.2%)
  • Margin of victory: 51,502 votes (25.4 percentage points)
  • First-place votes
    • VICKI HENNESSY: 112,783 votes (55.5 %)
    • ROSS MIRKARIMI: 61,281 votes (30.2 %)
    • JOHN ROBINSON: 11,847 votes (5.8 %)
  • Blanks: 17,158 (8.4 %)
  • Total ballots: 203,069

Approval voting results

2015-11-03_SanFrancisco-Sheriff approval voting results permalink:
🔗https://abif.electorama.com/id/2015-11-03_SanFrancisco-Sheriff/approval#approval
📝
Note — Approval counts estimated from 203,069 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: VICKI HENNESSY and ROSS MIRKARIMI. 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: 203069}
{version: "0.1"}
{ballotcount_abif_metadata: "203069"}
{is_ranking_to_rating: true}
#------ candlines ------
=[VICKI HENNESSY]:[VICKI HENNESSY]
=[ROSS MIRKARIMI]:[ROSS MIRKARIMI]
=[JOHN ROBINSON]:[JOHN ROBINSON]
#------- votelines ------
45603:[VICKI HENNESSY]/1
24062:[ROSS MIRKARIMI]/1
16561:[VICKI HENNESSY]/1
16314:[VICKI HENNESSY]/1
15614:[ROSS MIRKARIMI]/1
13556:[VICKI HENNESSY]/1
11692:[VICKI HENNESSY]/1
6686:[ROSS MIRKARIMI]/1
6077:[ROSS MIRKARIMI]/1
5994:[VICKI HENNESSY]/1
5278:[ROSS MIRKARIMI]/1
2823:[JOHN ROBINSON]/1=[VICKI HENNESSY]/1
1950:[JOHN ROBINSON]/1=[VICKI HENNESSY]/1
1893:[ROSS MIRKARIMI]/1
1470:[JOHN ROBINSON]/1=[ROSS MIRKARIMI]/1
983:[JOHN ROBINSON]/1=[VICKI HENNESSY]/1
821:[VICKI HENNESSY]/1
776:[VICKI HENNESSY]/1
770:[VICKI HENNESSY]/1
622:[ROSS MIRKARIMI]/1
405:[ROSS MIRKARIMI]/1
384:[VICKI HENNESSY]/1
357:[ROSS MIRKARIMI]/1
335:[JOHN ROBINSON]/1=[ROSS MIRKARIMI]/1
312:[VICKI HENNESSY]/1
207:[JOHN ROBINSON]/1=[ROSS MIRKARIMI]/1
169:[ROSS MIRKARIMI]/1
119:[JOHN ROBINSON]/1=[VICKI HENNESSY]/1
118:[ROSS MIRKARIMI]/1
42:[JOHN ROBINSON]/1=[ROSS MIRKARIMI]/1
  • Approval Winner: VICKI HENNESSY
  • Approval Results:
    • VICKI HENNESSY — 118,658 approvals (58.43% of ballots) (✅ winner)
    • ROSS MIRKARIMI — 63,335 approvals (31.19% of ballots)
    • JOHN ROBINSON — 7,929 approvals (3.9% of ballots)
  • Total: 203,069 ballots (189,922 total approvals)

STAR results

2015-11-03_SanFrancisco-Sheriff STAR results permalink:
🔗https://abif.electorama.com/id/2015-11-03_SanFrancisco-Sheriff/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 3 candidates, so the 1st choice gets 2 points, the 2nd choice gets 1 points, etc. These Borda scores are then used as STAR ratings for tabulation by STAR.

  • STAR winner: VICKI HENNESSY
  • Finalists: VICKI HENNESSY vs ROSS MIRKARIMI
  • Runoff result:
    • VICKI HENNESSY: 118,658 votes (58.4%)
    • ROSS MIRKARIMI: 63,335 votes (31.2%)
    • No preference: 21076 voters (10.4%)
  • Total stars allocated: 462,733
  • Total ballots: 203,069
★★★★★★

★★★★★

★★★★★★
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★★★★★★
★★★★★
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★★★★★★
(one star above is approximately 9,255 stars allocated by voters)
  • First round:
    • ★#0: VICKI HENNESSY received 254,111 stars (54.9%) from 141,328 voters (69.6%)
    • ★#1: ROSS MIRKARIMI received 143,390 stars (31.0%) from 82,109 voters (40.4%)
    • ★#2: JOHN ROBINSON received 65,232 stars (14.1%) from 53,385 voters (26.3%)
  • Finalists:
    • ★VICKI HENNESSY (✅ winner) preferred by 118,658 of 203,069 voters
    • ★ROSS MIRKARIMI preferred by 63,335 of 203,069 voters
    • ★No preference between the finalists: 21076

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

Condorcet/Copeland results

2015-11-03_SanFrancisco-Sheriff Condorcet/Copeland results permalink:
🔗https://abif.electorama.com/id/2015-11-03_SanFrancisco-Sheriff/pairwise#pairwise
  • Winner: VICKI HENNESSY
  • Runner-up: ROSS MIRKARIMI (beats all other candidates except VICKI HENNESSY)
  • Smallest margin: ROSS MIRKARIMI over JOHN ROBINSON (80,055-45,927; margin: 34,128)
  • Largest margin: VICKI HENNESSY over JOHN ROBINSON (135,453-19,305; margin: 116,148)
  • Pairwise ties: none
  • Total ballots: 203,069

Win-loss-tie (Condorcet/Copeland) table

2015-11-03_SanFrancisco-Sheriff w-l-t table permalink:
🔗https://abif.electorama.com/id/2015-11-03_SanFrancisco-Sheriff/pairwise#wlt
Sheriff (SanFrancisco; 2015-11-03) pairwise matchups
VICKI HENNESSY
(2-0-0)
VICKI HENNESSY
2 victories ⇣
ROSS MIRKARIMI
(1-1-0)
VICKI HENNESSY: 118,658(58.4%)
ROSS MIRKARIMI: 63,335(31.2%)
(No preference: 21,076; 10.4%)
ROSS MIRKARIMI
⇽ 1 loss / 1 victory† ⇣
JOHN ROBINSON
(0-2-0)
VICKI HENNESSY: 135,453(66.7%)
JOHN ROBINSON: 19,305(9.5%)
(No preference: 48,311; 23.8%)
ROSS MIRKARIMI: 80,055(39.4%)
JOHN ROBINSON: 45,927(22.6%)
(No preference: 77,087; 38.0%)

Pairwise tournament (Copeland ordered)

2015-11-03_SanFrancisco-Sheriff pairwise diagram permalink:
🔗https://abif.electorama.com/id/2015-11-03_SanFrancisco-Sheriff/pairwise#dot

%3 VICKI HENNESSY VICKI HENNESSY 2-0-0 (2 wins, 0 losses, 0 ties) ROSS MIRKARIMI ROSS MIRKARIMI 1-1-0 VICKI HENNESSY->ROSS MIRKARIMI ← VICKI HENNESSY: 118658 ROSS MIRKARIMI: 63335 JOHN ROBINSON JOHN ROBINSON 0-2-0 VICKI HENNESSY->JOHN ROBINSON ← VICKI HENNESSY: 135453 JOHN ROBINSON: 19305 ROSS MIRKARIMI->JOHN ROBINSON ← ROSS MIRKARIMI: 80055 JOHN ROBINSON: 45927

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

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