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MAYOR (SanFrancisco; 2019-11-05)

🔗 2019-11-05_SanFrancisco-MAYOR     (tags: { from-bolson , actual , SF , 2019-11 , SanFrancisco_CA , CA , SanFrancisco-2019 , 2019 })

Below is the ABIF from the "2019-11-05_SanFrancisco-MAYOR" election (MAYOR (SanFrancisco; 2019-11-05))

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

Results

🔗https://abif.electorama.com/id/2019-11-05_SanFrancisco-MAYOR

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 "choose_one". 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
FPTP LONDON N. BREED
Approval LONDON N. BREED
IRV/RCV LONDON N. BREED
STAR LONDON N. BREED
Condorcet/Copeland LONDON N. BREED
Election results summary showing voting method winners
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FPTP result

"FPTP" is "First-past-the-post", also known as "plurality" or "choose-one"
2019-11-05_SanFrancisco-MAYOR FPTP results permalink:
🔗https://abif.electorama.com/id/2019-11-05_SanFrancisco-MAYOR/FPTP#FPTP

  • FPTP Winner: LONDON N. BREED with 124,849 first-place votes (60.6%)
  • Runner-up: ELLEN LEE ZHOU with 24,594 first-place votes (11.9%)
  • Margin of victory: 100,255 votes (48.6 percentage points)
  • First-place votes
    • LONDON N. BREED: 124,849 votes (60.6 %)
    • ELLEN LEE ZHOU: 24,594 votes (11.9 %)
    • JOEL VENTRESCA: 12,821 votes (6.2 %)
    • PAUL YBARRA ROBERTSON: 7,447 votes (3.6 %)
    • Write-in: 4,950 votes (2.4 %)
    • WILMA PANG: 4,660 votes (2.3 %)
    • ROBERT L. JORDAN, JR.: 2,314 votes (1.1 %)
  • Blanks: 24,482 (11.9 %)
  • Total ballots: 206,117

Approval voting results

2019-11-05_SanFrancisco-MAYOR approval voting results permalink:
🔗https://abif.electorama.com/id/2019-11-05_SanFrancisco-MAYOR/approval#approval
📝
Note — Approvals inferred from choose_one ballots
Details

Approval results are derived by treating each voter's single top choice as their only approval. Lower preferences are not available on choose_one ballots.

  • Approval Winner: LONDON N. BREED
  • Approval Results:
    • LONDON N. BREED — 124,849 approvals (60.57% of ballots) (✅ winner)
    • ELLEN LEE ZHOU — 24,594 approvals (11.93% of ballots)
    • JOEL VENTRESCA — 12,821 approvals (6.22% of ballots)
    • PAUL YBARRA ROBERTSON — 7,447 approvals (3.61% of ballots)
    • Write-in — 4,950 approvals (2.4% of ballots)
    • WILMA PANG — 4,660 approvals (2.26% of ballots)
    • ROBERT L. JORDAN, JR. — 2,314 approvals (1.12% of ballots)
  • Total: 206,117 ballots (181,635 total approvals)

IRV/RCV results

2019-11-05_SanFrancisco-MAYOR IRV/RCV result permalink:
🔗https://abif.electorama.com/id/2019-11-05_SanFrancisco-MAYOR/IRV#IRV
📝
Note — IRV/RCV applied to choose_one ballots (no transfers)
Details

These ballots indicate only a single top choice per voter. IRV/RCV on choose_one ballots cannot transfer votes or use lower preferences, so the result is equivalent to plurality on first choices.

  • IRV/RCV Winner: LONDON N. BREED with 124,849 votes (60.6%) in final round
  • Runner-up: ELLEN LEE ZHOU with 24,594 votes (11.9%) in final round
  • Exhausted ballots in final round: 24,482 (11.9%)
  • Number of rounds: 1
  • Ballots counted in final round: 181,635 (88.1%)
  • Majority of ballots: 103,059 (50.0%)
  • Total ballots: 206,117
Round 1
Overview:
Active ballots: 206,117 (100.0%)

Exhausted ballots: 24,482 (11.9%)
Counted ballots: 181,635 (88.1%)
Winning threshold: 90,818 (44.06%)
IRV/RCV winner:
LONDON N. BREED: 124,849 (60.6%)✅
→
ELLEN LEE ZHOU: 24,594 (11.9%) (🛑eliminated)
→
JOEL VENTRESCA: 12,821 (6.2%) (🛑eliminated)
→
PAUL YBARRA ROBERTSON: 7,447 (3.6%) (🛑eliminated)
→
Write-in: 4,950 (2.4%) (🛑eliminated)
→
WILMA PANG: 4,660 (2.3%) (🛑eliminated)
→
ROBERT L. JORDAN, JR.: 2,314 (1.1%) (🛑eliminated)
→

STAR results

2019-11-05_SanFrancisco-MAYOR STAR results permalink:
🔗https://abif.electorama.com/id/2019-11-05_SanFrancisco-MAYOR/STAR#STAR
📝
Note — STAR interpretation from choose_one ballots
Details

Choose_one ballots provide only each voter's top choice and no ratings. STAR results shown here are computed without true ratings and should be interpreted cautiously.

  • STAR winner: LONDON N. BREED
  • Finalists: LONDON N. BREED vs ELLEN LEE ZHOU
  • Runoff result:
    • LONDON N. BREED: 124,849 votes (60.6%)
    • ELLEN LEE ZHOU: 24,594 votes (11.9%)
    • No preference: 56674 voters (27.5%)
  • Total stars allocated: 1,089,810
  • Total ballots: 206,117
★★★★★★

★★★★★

★★★★★★
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(one star above is approximately 21,796 stars allocated by voters)
  • First round:
    • ★#0: LONDON N. BREED received 749,094 stars (68.7%) from 124,849 voters (60.6%)
    • ★#1: ELLEN LEE ZHOU received 147,564 stars (13.5%) from 24,594 voters (11.9%)
    • ★#2: JOEL VENTRESCA received 76,926 stars (7.1%) from 12,821 voters (6.2%)
    • ★#3: PAUL YBARRA ROBERTSON received 44,682 stars (4.1%) from 7,447 voters (3.6%)
    • ★#4: Write-in received 29,700 stars (2.7%) from 4,950 voters (2.4%)
    • ★#5: WILMA PANG received 27,960 stars (2.6%) from 4,660 voters (2.3%)
    • ★#6: ROBERT L. JORDAN, JR. received 13,884 stars (1.3%) from 2,314 voters (1.1%)
  • Finalists:
    • ★LONDON N. BREED (✅ winner) preferred by 124,849 of 206,117 voters
    • ★ELLEN LEE ZHOU preferred by 24,594 of 206,117 voters
    • ★No preference between the finalists: 56674

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

Condorcet/Copeland results

2019-11-05_SanFrancisco-MAYOR Condorcet/Copeland results permalink:
🔗https://abif.electorama.com/id/2019-11-05_SanFrancisco-MAYOR/pairwise#pairwise
📝
Note — Pairwise comparisons derived from top-choice-only ballots
Details

Pairwise/Condorcet comparisons use only each voter's top choice from choose_one ballots. No lower preferences are available, so many matchups will show a large 'No preference' count.

  • Winner: LONDON N. BREED
  • Runner-up: ELLEN LEE ZHOU (beats all other candidates except LONDON N. BREED)
  • Smallest margin: WILMA PANG over ROBERT L. JORDAN, JR. (4,660-2,314; margin: 2,346)
  • Largest margin: LONDON N. BREED over Write-in (124,849-4,950; margin: 119,899)
  • Pairwise ties: none
  • Total ballots: 206,117

Win-loss-tie (Condorcet/Copeland) table

2019-11-05_SanFrancisco-MAYOR w-l-t table permalink:
🔗https://abif.electorama.com/id/2019-11-05_SanFrancisco-MAYOR/pairwise#wlt
MAYOR (SanFrancisco; 2019-11-05) pairwise matchups
LONDON N. BREED
(6-0-0)
LONDON N. BREED
6 victories ⇣
ELLEN LEE ZHOU
(5-1-0)
LONDON N. BREED: 124,849(60.6%)
ELLEN LEE ZHOU: 24,594(11.9%)
(No preference: 56,674; 27.5%)
ELLEN LEE ZHOU
⇽ 1 loss / 5 victories† ⇣
JOEL VENTRESCA
(4-2-0)
LONDON N. BREED: 124,849(60.6%)
JOEL VENTRESCA: 12,821(6.2%)
(No preference: 68,447; 33.2%)
ELLEN LEE ZHOU: 24,594(11.9%)
JOEL VENTRESCA: 12,821(6.2%)
(No preference: 168,702; 81.8%)
JOEL VENTRESCA
⇽ 2 losses / 4 victories† ⇣
PAUL YBARRA ROBERTSON
(3-3-0)
LONDON N. BREED: 124,849(60.6%)
PAUL YBARRA ROBERTSON: 7,447(3.6%)
(No preference: 73,821; 35.8%)
ELLEN LEE ZHOU: 24,594(11.9%)
PAUL YBARRA ROBERTSON: 7,447(3.6%)
(No preference: 174,076; 84.5%)
JOEL VENTRESCA: 12,821(6.2%)
PAUL YBARRA ROBERTSON: 7,447(3.6%)
(No preference: 185,849; 90.2%)
PAUL YBARRA ROBERTSON
⇽ 3 losses / 3 victories† ⇣
Write-in
(2-4-0)
LONDON N. BREED: 124,849(60.6%)
Write-in: 4,950(2.4%)
(No preference: 76,318; 37.0%)
ELLEN LEE ZHOU: 24,594(11.9%)
Write-in: 4,950(2.4%)
(No preference: 176,573; 85.7%)
JOEL VENTRESCA: 12,821(6.2%)
Write-in: 4,950(2.4%)
(No preference: 188,346; 91.4%)
PAUL YBARRA ROBERTSON: 7,447(3.6%)
Write-in: 4,950(2.4%)
(No preference: 193,720; 94.0%)
Write-in
⇽ 4 losses / 2 victories† ⇣
WILMA PANG
(1-5-0)
LONDON N. BREED: 124,849(60.6%)
WILMA PANG: 4,660(2.3%)
(No preference: 76,608; 37.2%)
ELLEN LEE ZHOU: 24,594(11.9%)
WILMA PANG: 4,660(2.3%)
(No preference: 176,863; 85.8%)
JOEL VENTRESCA: 12,821(6.2%)
WILMA PANG: 4,660(2.3%)
(No preference: 188,636; 91.5%)
PAUL YBARRA ROBERTSON: 7,447(3.6%)
WILMA PANG: 4,660(2.3%)
(No preference: 194,010; 94.1%)
Write-in: 4,950(2.4%)
WILMA PANG: 4,660(2.3%)
(No preference: 196,507; 95.3%)
WILMA PANG
⇽ 5 losses / 1 victory† ⇣
ROBERT L. JORDAN, JR.
(0-6-0)
LONDON N. BREED: 124,849(60.6%)
ROBERT L. JORDAN, JR.: 2,314(1.1%)
(No preference: 78,954; 38.3%)
ELLEN LEE ZHOU: 24,594(11.9%)
ROBERT L. JORDAN, JR.: 2,314(1.1%)
(No preference: 179,209; 86.9%)
JOEL VENTRESCA: 12,821(6.2%)
ROBERT L. JORDAN, JR.: 2,314(1.1%)
(No preference: 190,982; 92.7%)
PAUL YBARRA ROBERTSON: 7,447(3.6%)
ROBERT L. JORDAN, JR.: 2,314(1.1%)
(No preference: 196,356; 95.3%)
Write-in: 4,950(2.4%)
ROBERT L. JORDAN, JR.: 2,314(1.1%)
(No preference: 198,853; 96.5%)
WILMA PANG: 4,660(2.3%)
ROBERT L. JORDAN, JR.: 2,314(1.1%)
(No preference: 199,143; 96.6%)

Pairwise tournament (Copeland ordered)

2019-11-05_SanFrancisco-MAYOR pairwise diagram permalink:
🔗https://abif.electorama.com/id/2019-11-05_SanFrancisco-MAYOR/pairwise#dot

%3 LONDON N. BREED LONDON N. BREED 6-0-0 (6 wins, 0 losses, 0 ties) ELLEN LEE ZHOU ELLEN LEE ZHOU 5-1-0 LONDON N. BREED->ELLEN LEE ZHOU ← LONDON N. BREED: 124849 ELLEN LEE ZHOU: 24594 JOEL VENTRESCA JOEL VENTRESCA 4-2-0 LONDON N. BREED->JOEL VENTRESCA ← LONDON N. BREED: 124849 JOEL VENTRESCA: 12821 PAUL YBARRA ROBERTSON PAUL YBARRA ROBERTSON 3-3-0 LONDON N. BREED->PAUL YBARRA ROBERTSON ← LONDON N. BREED: 124849 PAUL YBARRA ROBERTSON: 7447 Write-in Write-in 2-4-0 LONDON N. BREED->Write-in ← LONDON N. BREED: 124849 Write-in: 4950 WILMA PANG WILMA PANG 1-5-0 LONDON N. BREED->WILMA PANG ← LONDON N. BREED: 124849 WILMA PANG: 4660 ROBERT L. JORDAN, JR. ROBERT L. JORDAN, JR. 0-6-0 LONDON N. BREED->ROBERT L. JORDAN, JR. ← LONDON N. BREED: 124849 ROBERT L. JORDAN, JR.: 2314 ELLEN LEE ZHOU->JOEL VENTRESCA ← ELLEN LEE ZHOU: 24594 JOEL VENTRESCA: 12821 ELLEN LEE ZHOU->PAUL YBARRA ROBERTSON ← ELLEN LEE ZHOU: 24594 PAUL YBARRA ROBERTSON: 7447 ELLEN LEE ZHOU->Write-in ← ELLEN LEE ZHOU: 24594 Write-in: 4950 ELLEN LEE ZHOU->WILMA PANG ← ELLEN LEE ZHOU: 24594 WILMA PANG: 4660 ELLEN LEE ZHOU->ROBERT L. JORDAN, JR. ← ELLEN LEE ZHOU: 24594 ROBERT L. JORDAN, JR.: 2314 JOEL VENTRESCA->PAUL YBARRA ROBERTSON ← JOEL VENTRESCA: 12821 PAUL YBARRA ROBERTSON: 7447 JOEL VENTRESCA->Write-in ← JOEL VENTRESCA: 12821 Write-in: 4950 JOEL VENTRESCA->WILMA PANG ← JOEL VENTRESCA: 12821 WILMA PANG: 4660 JOEL VENTRESCA->ROBERT L. JORDAN, JR. ← JOEL VENTRESCA: 12821 ROBERT L. JORDAN, JR.: 2314 PAUL YBARRA ROBERTSON->Write-in ← PAUL YBARRA ROBERTSON: 7447 Write-in: 4950 PAUL YBARRA ROBERTSON->WILMA PANG ← PAUL YBARRA ROBERTSON: 7447 WILMA PANG: 4660 PAUL YBARRA ROBERTSON->ROBERT L. JORDAN, JR. ← PAUL YBARRA ROBERTSON: 7447 ROBERT L. JORDAN, JR.: 2314 Write-in->WILMA PANG ← Write-in: 4950 WILMA PANG: 4660 Write-in->ROBERT L. JORDAN, JR. ← Write-in: 4950 ROBERT L. JORDAN, JR.: 2314 WILMA PANG->ROBERT L. JORDAN, JR. ← WILMA PANG: 4660 ROBERT L. JORDAN, JR.: 2314

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

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