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Board of Supervisors District 9 (SanFrancisco; 2016-11-06)

🔗 2016-11-06_SanFrancisco-Board_of_Supervisors_District_9     (tags: { from-bolson , actual , SF , SanFrancisco_CA , 2016 , 2016-11 , CA , SanFrancisco-2016 })

Below is the ABIF from the "2016-11-06_SanFrancisco-Board_of_Supervisors_District_9" election (Board of Supervisors District 9 (SanFrancisco; 2016-11-06))

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

Results

🔗https://abif.electorama.com/id/2016-11-06_SanFrancisco-Board_of_Supervisors_District_9

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

IRV/RCV results

2016-11-06_SanFrancisco-Board_of_Supervisors_District_9 IRV/RCV result permalink:
🔗https://abif.electorama.com/id/2016-11-06_SanFrancisco-Board_of_Supervisors_District_9/IRV#IRV

  • IRV/RCV Winner: HILLARY RONEN with 18,365 votes (52.6%) in final round
  • Runner-up: JOSHUA ARCE with 9,663 votes (27.7%) in final round
  • Exhausted ballots in final round: 2,823 (8.1%)
  • Number of rounds: 1
  • Ballots counted in final round: 32,122 (91.9%)
  • Majority of ballots: 17,473 (50.0%)
  • Total ballots: 34,945
Round 1
Overview:
Active ballots: 34,945 (100.0%)

Exhausted ballots: 2,823 (8.1%)
Counted ballots: 32,122 (91.9%)
Winning threshold: 16,062 (45.96%)
IRV/RCV winner:
HILLARY RONEN: 18,365 (52.6%)✅
→
JOSHUA ARCE: 9,663 (27.7%) (🛑eliminated)
→
MELISSA SAN MIGUEL: 3,533 (10.1%) (🛑eliminated)
→
ISWARI ESPAÑA: 561 (1.6%) (🛑eliminated)
→

FPTP result

"FPTP" is "First-past-the-post", also known as "plurality" or "choose-one"
2016-11-06_SanFrancisco-Board_of_Supervisors_District_9 FPTP results permalink:
🔗https://abif.electorama.com/id/2016-11-06_SanFrancisco-Board_of_Supervisors_District_9/FPTP#FPTP
📝
Note — Only using first-choices on ranked ballots

  • FPTP Winner: HILLARY RONEN with 18,365 first-place votes (52.6%)
  • Runner-up: JOSHUA ARCE with 9,663 first-place votes (27.7%)
  • Margin of victory: 8,702 votes (24.9 percentage points)
  • First-place votes
    • HILLARY RONEN: 18,365 votes (52.6 %)
    • JOSHUA ARCE: 9,663 votes (27.7 %)
    • MELISSA SAN MIGUEL: 3,533 votes (10.1 %)
    • ISWARI ESPAÑA: 561 votes (1.6 %)
  • Blanks: 2,823 (8.1 %)
  • Total ballots: 34,945

Approval voting results

2016-11-06_SanFrancisco-Board_of_Supervisors_District_9 approval voting results permalink:
🔗https://abif.electorama.com/id/2016-11-06_SanFrancisco-Board_of_Supervisors_District_9/approval#approval
📝
Note — Approval counts estimated from 34,945 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: HILLARY RONEN and JOSHUA ARCE. 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: 34945}
{version: "0.1"}
{ballotcount_abif_metadata: "34945"}
{is_ranking_to_rating: true}
#------ candlines ------
=[HILLARY RONEN]:[HILLARY RONEN]
=[JOSHUA ARCE]:[JOSHUA ARCE]
=[MELISSA SAN MIGUEL]:[MELISSA SAN MIGUEL]
=[ISWARI ESPAÑA]:[ISWARI ESPAÑA]
#------- votelines ------
3610:[HILLARY RONEN]/1
3502:[HILLARY RONEN]/1
2651:[HILLARY RONEN]/1
2513:[HILLARY RONEN]/1
2458:[JOSHUA ARCE]/1
1833:[JOSHUA ARCE]/1
1676:[HILLARY RONEN]/1
1382:[HILLARY RONEN]/1
1244:[JOSHUA ARCE]/1
1168:[HILLARY RONEN]/1
1043:[JOSHUA ARCE]/1
885:[JOSHUA ARCE]/1
793:[HILLARY RONEN]/1=[MELISSA SAN MIGUEL]/1
669:[HILLARY RONEN]/1
663:[JOSHUA ARCE]/1
535:[JOSHUA ARCE]/1=[MELISSA SAN MIGUEL]/1
455:[HILLARY RONEN]/1=[MELISSA SAN MIGUEL]/1
448:[JOSHUA ARCE]/1
390:[HILLARY RONEN]/1
342:[JOSHUA ARCE]/1
284:[ISWARI ESPAÑA]/1=[JOSHUA ARCE]/1=[MELISSA SAN MIGUEL]/1
234:[JOSHUA ARCE]/1=[MELISSA SAN MIGUEL]/1
219:[HILLARY RONEN]/1
213:[HILLARY RONEN]/1=[ISWARI ESPAÑA]/1=[MELISSA SAN MIGUEL]/1
205:[JOSHUA ARCE]/1
194:[HILLARY RONEN]/1=[MELISSA SAN MIGUEL]/1
188:[HILLARY RONEN]/1
158:[JOSHUA ARCE]/1
152:[JOSHUA ARCE]/1
101:[HILLARY RONEN]/1
92:[JOSHUA ARCE]/1=[MELISSA SAN MIGUEL]/1
91:[HILLARY RONEN]/1
86:[HILLARY RONEN]/1=[MELISSA SAN MIGUEL]/1
82:[HILLARY RONEN]/1=[ISWARI ESPAÑA]/1=[MELISSA SAN MIGUEL]/1
80:[ISWARI ESPAÑA]/1=[JOSHUA ARCE]/1=[MELISSA SAN MIGUEL]/1
74:[HILLARY RONEN]/1
64:[HILLARY RONEN]/1
60:[JOSHUA ARCE]/1
56:[HILLARY RONEN]/1=[ISWARI ESPAÑA]/1
52:[ISWARI ESPAÑA]/1=[JOSHUA ARCE]/1
50:[HILLARY RONEN]/1=[ISWARI ESPAÑA]/1
48:[JOSHUA ARCE]/1
46:[JOSHUA ARCE]/1
45:[ISWARI ESPAÑA]/1=[JOSHUA ARCE]/1
45:[HILLARY RONEN]/1
43:[JOSHUA ARCE]/1=[MELISSA SAN MIGUEL]/1
31:[JOSHUA ARCE]/1
30:[JOSHUA ARCE]/1
24:[HILLARY RONEN]/1=[MELISSA SAN MIGUEL]/1
14:[HILLARY RONEN]/1
14:[HILLARY RONEN]/1=[ISWARI ESPAÑA]/1
11:[JOSHUA ARCE]/1
11:[JOSHUA ARCE]/1=[MELISSA SAN MIGUEL]/1
10:[ISWARI ESPAÑA]/1=[JOSHUA ARCE]/1
8:[HILLARY RONEN]/1
6:[ISWARI ESPAÑA]/1=[JOSHUA ARCE]/1
6:[HILLARY RONEN]/1=[ISWARI ESPAÑA]/1
6:[JOSHUA ARCE]/1
3:[HILLARY RONEN]/1=[ISWARI ESPAÑA]/1
2:[ISWARI ESPAÑA]/1=[JOSHUA ARCE]/1
  • Approval Winner: HILLARY RONEN
  • Approval Results:
    • HILLARY RONEN — 20,341 approvals (58.21% of ballots) (✅ winner)
    • JOSHUA ARCE — 11,057 approvals (31.64% of ballots)
    • MELISSA SAN MIGUEL — 3,126 approvals (8.95% of ballots)
    • ISWARI ESPAÑA — 903 approvals (2.58% of ballots)
  • Total: 34,945 ballots (35,427 total approvals)

STAR results

2016-11-06_SanFrancisco-Board_of_Supervisors_District_9 STAR results permalink:
🔗https://abif.electorama.com/id/2016-11-06_SanFrancisco-Board_of_Supervisors_District_9/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 4 candidates, so the 1st choice gets 3 points, the 2nd choice gets 2 points, etc. These Borda scores are then used as STAR ratings for tabulation by STAR.

  • STAR winner: HILLARY RONEN
  • Finalists: HILLARY RONEN vs JOSHUA ARCE
  • Runoff result:
    • HILLARY RONEN: 20,341 votes (58.2%)
    • JOSHUA ARCE: 11,057 votes (31.6%)
    • No preference: 3547 voters (10.2%)
  • Total stars allocated: 161,586
  • Total ballots: 34,945
★★★★★★

★★★★★

★★★★★★
★★★★★
★★★★★★
★★★★★
★★★★★★
★★★★★
★★★★★★
(one star above is approximately 3,232 stars allocated by voters)
  • First round:
    • ★#0: HILLARY RONEN received 69,233 stars (42.8%) from 26,472 voters (75.8%)
    • ★#1: JOSHUA ARCE received 47,344 stars (29.3%) from 20,879 voters (59.7%)
    • ★#2: MELISSA SAN MIGUEL received 35,627 stars (22.0%) from 19,447 voters (55.7%)
    • ★#3: ISWARI ESPAÑA received 9,382 stars (5.8%) from 6,447 voters (18.4%)
  • Finalists:
    • ★HILLARY RONEN (✅ winner) preferred by 20,341 of 34,945 voters
    • ★JOSHUA ARCE preferred by 11,057 of 34,945 voters
    • ★No preference between the finalists: 3547

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

Condorcet/Copeland results

2016-11-06_SanFrancisco-Board_of_Supervisors_District_9 Condorcet/Copeland results permalink:
🔗https://abif.electorama.com/id/2016-11-06_SanFrancisco-Board_of_Supervisors_District_9/pairwise#pairwise
  • Winner: HILLARY RONEN
  • Runner-up: JOSHUA ARCE (beats all other candidates except HILLARY RONEN)
  • Smallest margin: JOSHUA ARCE over MELISSA SAN MIGUEL (16,156-10,870; margin: 5,286)
  • Largest margin: HILLARY RONEN over ISWARI ESPAÑA (25,845-2,798; margin: 23,047)
  • Pairwise ties: none
  • Total ballots: 34,945

Win-loss-tie (Condorcet/Copeland) table

2016-11-06_SanFrancisco-Board_of_Supervisors_District_9 w-l-t table permalink:
🔗https://abif.electorama.com/id/2016-11-06_SanFrancisco-Board_of_Supervisors_District_9/pairwise#wlt
Board of Supervisors District 9 (SanFrancisco; 2016-11-06) pairwise matchups
HILLARY RONEN
(3-0-0)
HILLARY RONEN
3 victories ⇣
JOSHUA ARCE
(2-1-0)
HILLARY RONEN: 20,341(58.2%)
JOSHUA ARCE: 11,057(31.6%)
(No preference: 3,547; 10.2%)
JOSHUA ARCE
⇽ 1 loss / 2 victories† ⇣
MELISSA SAN MIGUEL
(1-2-0)
HILLARY RONEN: 23,047(66.0%)
MELISSA SAN MIGUEL: 6,359(18.2%)
(No preference: 5,539; 15.9%)
JOSHUA ARCE: 16,156(46.2%)
MELISSA SAN MIGUEL: 10,870(31.1%)
(No preference: 7,919; 22.7%)
MELISSA SAN MIGUEL
⇽ 2 losses / 1 victory† ⇣
ISWARI ESPAÑA
(0-3-0)
HILLARY RONEN: 25,845(74.0%)
ISWARI ESPAÑA: 2,798(8.0%)
(No preference: 6,302; 18.0%)
JOSHUA ARCE: 20,131(57.6%)
ISWARI ESPAÑA: 3,663(10.5%)
(No preference: 11,151; 31.9%)
MELISSA SAN MIGUEL: 18,398(52.6%)
ISWARI ESPAÑA: 2,921(8.4%)
(No preference: 13,626; 39.0%)

Pairwise tournament (Copeland ordered)

2016-11-06_SanFrancisco-Board_of_Supervisors_District_9 pairwise diagram permalink:
🔗https://abif.electorama.com/id/2016-11-06_SanFrancisco-Board_of_Supervisors_District_9/pairwise#dot

%3 HILLARY RONEN HILLARY RONEN 3-0-0 (3 wins, 0 losses, 0 ties) JOSHUA ARCE JOSHUA ARCE 2-1-0 HILLARY RONEN->JOSHUA ARCE ← HILLARY RONEN: 20341 JOSHUA ARCE: 11057 MELISSA SAN MIGUEL MELISSA SAN MIGUEL 1-2-0 HILLARY RONEN->MELISSA SAN MIGUEL ← HILLARY RONEN: 23047 MELISSA SAN MIGUEL: 6359 ISWARI ESPAÑA ISWARI ESPAÑA 0-3-0 HILLARY RONEN->ISWARI ESPAÑA ← HILLARY RONEN: 25845 ISWARI ESPAÑA: 2798 JOSHUA ARCE->MELISSA SAN MIGUEL ← JOSHUA ARCE: 16156 MELISSA SAN MIGUEL: 10870 JOSHUA ARCE->ISWARI ESPAÑA ← JOSHUA ARCE: 20131 ISWARI ESPAÑA: 3663 MELISSA SAN MIGUEL->ISWARI ESPAÑA ← MELISSA SAN MIGUEL: 18398 ISWARI ESPAÑA: 2921

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

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