BOARD OF SUPERVISORS DISTRICT 10 (SanFrancisco; 2022-11-08)

🔗 2022-11-08_SanFrancisco-BOARD_OF_SUPERVISORS_DISTRICT_10 (tags: { from-bolson , actual , 2022 , 2022-11 , SF , SanFrancisco_CA , CA , SanFrancisco-2022 })

Below is the ABIF from the "2022-11-08_SanFrancisco-BOARD_OF_SUPERVISORS_DISTRICT_10" election (BOARD OF SUPERVISORS DISTRICT 10 (SanFrancisco; 2022-11-08))

ABIF submission area (show)

#------- metadata -------
{version: "0.1"}
{ballotcount: 20674}
#------ candlines ------
=[BRIAN SAM ADAM]:[BRIAN SAM ADAM]
=[SHAMANN WALTON]:[SHAMANN WALTON]
=Write-in:[Write-in]
#------- votelines ------
6022:[SHAMANN WALTON]
5077:[SHAMANN WALTON]>[BRIAN SAM ADAM]
3678:
2205:[BRIAN SAM ADAM]>[SHAMANN WALTON]
1788:[BRIAN SAM ADAM]
559:[SHAMANN WALTON]
160:[BRIAN SAM ADAM]
117:[BRIAN SAM ADAM]>[SHAMANN WALTON]
115:[SHAMANN WALTON]>[BRIAN SAM ADAM]
112:[SHAMANN WALTON]
93:Write-in
92:[SHAMANN WALTON]>[BRIAN SAM ADAM]>Write-in
89:[SHAMANN WALTON]>[BRIAN SAM ADAM]
78:[BRIAN SAM ADAM]>[SHAMANN WALTON]
76:[BRIAN SAM ADAM]>[SHAMANN WALTON]>Write-in
53:[BRIAN SAM ADAM]
39:[BRIAN SAM ADAM]=[SHAMANN WALTON]
35:Write-in
30:[BRIAN SAM ADAM]>Write-in>[SHAMANN WALTON]
28:[SHAMANN WALTON]>Write-in>[BRIAN SAM ADAM]
21:Write-in>[BRIAN SAM ADAM]>[SHAMANN WALTON]
21:Write-in>[SHAMANN WALTON]>[BRIAN SAM ADAM]
19:[BRIAN SAM ADAM]>Write-in
19:[SHAMANN WALTON]>Write-in
15:[BRIAN SAM ADAM]=[SHAMANN WALTON]
15:[BRIAN SAM ADAM]>Write-in
14:Write-in>[BRIAN SAM ADAM]
14:[SHAMANN WALTON]=Write-in
14:[BRIAN SAM ADAM]=[SHAMANN WALTON]
10:Write-in>[SHAMANN WALTON]
6:[SHAMANN WALTON]>Write-in
6:[SHAMANN WALTON]=Write-in>[BRIAN SAM ADAM]
6:[BRIAN SAM ADAM]>[SHAMANN WALTON]=Write-in
6:[BRIAN SAM ADAM]>Write-in
4:Write-in
3:[SHAMANN WALTON]=Write-in>[BRIAN SAM ADAM]
3:[BRIAN SAM ADAM]>[SHAMANN WALTON]=Write-in
3:[SHAMANN WALTON]>Write-in
2:[SHAMANN WALTON]=Write-in>[BRIAN SAM ADAM]
2:[BRIAN SAM ADAM]=[SHAMANN WALTON]=Write-in
2:[BRIAN SAM ADAM]=Write-in>[SHAMANN WALTON]
2:Write-in>[SHAMANN WALTON]
2:[BRIAN SAM ADAM]=[SHAMANN WALTON]=Write-in
2:Write-in>[BRIAN SAM ADAM]
2:[SHAMANN WALTON]>Write-in=[BRIAN SAM ADAM]
2:[SHAMANN WALTON]>[BRIAN SAM ADAM]=Write-in
2:Write-in>[SHAMANN WALTON]
2:[BRIAN SAM ADAM]=Write-in
1:[BRIAN SAM ADAM]=Write-in>[SHAMANN WALTON]
1:[BRIAN SAM ADAM]=Write-in>[SHAMANN WALTON]
1:[BRIAN SAM ADAM]=Write-in
1:[BRIAN SAM ADAM]=[SHAMANN WALTON]=Write-in
1:[SHAMANN WALTON]=Write-in
1:Write-in>[BRIAN SAM ADAM]
1:Write-in>[BRIAN SAM ADAM]=[SHAMANN WALTON]
1:[SHAMANN WALTON]>[BRIAN SAM ADAM]=Write-in
1:[BRIAN SAM ADAM]>[SHAMANN WALTON]=Write-in

Method options

FPTP results?

IRV/RCV results?

IRV extra analysis?

Approval results?

STAR results?

pairwise (Condorcet/Copeland) results?

pairwise tournament diagram?

Ballot options Transform ballots (using ballot-type metadata)?

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

Results

🔗https://abif.electorama.com/id/2022-11-08_SanFrancisco-BOARD_OF_SUPERVISORS_DISTRICT_10

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	SHAMANN WALTON
FPTP	SHAMANN WALTON
Approval	SHAMANN WALTON
STAR	SHAMANN WALTON
Condorcet/Copeland	SHAMANN WALTON

OFF ON tabbed view

IRV/RCV results

2022-11-08_SanFrancisco-BOARD_OF_SUPERVISORS_DISTRICT_10 IRV/RCV result permalink:
🔗https://abif.electorama.com/id/2022-11-08_SanFrancisco-BOARD_OF_SUPERVISORS_DISTRICT_10/IRV#IRV

IRV/RCV Winner: SHAMANN WALTON with 12,127 votes (58.7%) in final round
Runner-up: BRIAN SAM ADAM with 4,557 votes (22.0%) in final round
Exhausted ballots in final round: 3,784 (18.3%)
Number of rounds: 1
Ballots counted in final round: 16,890 (81.7%)
Majority of ballots: 10,338 (50.0%)
Total ballots: 20,674

Round 1
Overview: Active ballots: 20,674 (100.0%) Exhausted ballots: 3,678 (17.8%) Overvotes: 106 (0.5%) Counted ballots: 16,890 (81.7%) Winning threshold: 8,446 (40.85%)
IRV/RCV winner: SHAMANN WALTON: 12,127 (58.7%)✅ →
BRIAN SAM ADAM: 4,557 (22.0%) (🛑eliminated) →
Write-in: 206 (1.0%) (🛑eliminated) →

Overvotes are ballots where multiple candidates are ranked at the same, highest-ranking position.

FPTP result

"FPTP" is "First-past-the-post", also known as "plurality" or "choose-one"
2022-11-08_SanFrancisco-BOARD_OF_SUPERVISORS_DISTRICT_10 FPTP results permalink:
🔗https://abif.electorama.com/id/2022-11-08_SanFrancisco-BOARD_OF_SUPERVISORS_DISTRICT_10/FPTP#FPTP

FPTP Winner: SHAMANN WALTON with 12,127 first-place votes (58.7%)
Runner-up: BRIAN SAM ADAM with 4,557 first-place votes (22.0%)
Margin of victory: 7,570 votes (36.6 percentage points)
First-place votes
- SHAMANN WALTON: 12,127 votes (58.7 %)
- BRIAN SAM ADAM: 4,557 votes (22.0 %)
- Write-in: 206 votes (1.0 %)
Overvotes: 106 (0.5 %)
Blanks: 3,678 (17.8 %)
Total ballots: 20,674

Approval voting results

2022-11-08_SanFrancisco-BOARD_OF_SUPERVISORS_DISTRICT_10 approval voting results permalink:
🔗https://abif.electorama.com/id/2022-11-08_SanFrancisco-BOARD_OF_SUPERVISORS_DISTRICT_10/approval#approval

📝

Note — Approval counts estimated from 20,674 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: SHAMANN WALTON and BRIAN SAM ADAM. 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: 20674}
{version: "0.1"}
{ballotcount_abif_metadata: "20674"}
{is_ranking_to_rating: true}
#------ candlines ------
=Write-in:[Write-in]
=[SHAMANN WALTON]:[SHAMANN WALTON]
=[BRIAN SAM ADAM]:[BRIAN SAM ADAM]
#------- votelines ------
6022:[SHAMANN WALTON]/1
5077:[SHAMANN WALTON]/1
2205:[BRIAN SAM ADAM]/1
1788:[BRIAN SAM ADAM]/1
559:[SHAMANN WALTON]/1
160:[BRIAN SAM ADAM]/1
117:[BRIAN SAM ADAM]/1
115:[SHAMANN WALTON]/1
112:[SHAMANN WALTON]/1
92:[SHAMANN WALTON]/1
89:[SHAMANN WALTON]/1
78:[BRIAN SAM ADAM]/1
76:[BRIAN SAM ADAM]/1
53:[BRIAN SAM ADAM]/1
30:[BRIAN SAM ADAM]/1
28:[SHAMANN WALTON]/1
21:[BRIAN SAM ADAM]/1=Write-in/1
21:[SHAMANN WALTON]/1=Write-in/1
19:[BRIAN SAM ADAM]/1
19:[SHAMANN WALTON]/1
15:[BRIAN SAM ADAM]/1
14:[BRIAN SAM ADAM]/1=Write-in/1
10:[SHAMANN WALTON]/1=Write-in/1
6:[SHAMANN WALTON]/1
6:[BRIAN SAM ADAM]/1
6:[BRIAN SAM ADAM]/1
3:[BRIAN SAM ADAM]/1
3:[SHAMANN WALTON]/1
2:[SHAMANN WALTON]/1=Write-in/1
2:[BRIAN SAM ADAM]/1=Write-in/1
2:[SHAMANN WALTON]/1
2:[SHAMANN WALTON]/1
2:[SHAMANN WALTON]/1=Write-in/1
1:[BRIAN SAM ADAM]/1=Write-in/1
1:[BRIAN SAM ADAM]/1=Write-in/1
1:[SHAMANN WALTON]/1
1:[BRIAN SAM ADAM]/1

Approval Winner: SHAMANN WALTON
Approval Results:
- SHAMANN WALTON — 12,162 approvals (58.83% of ballots) (✅ winner)
- BRIAN SAM ADAM — 4,596 approvals (22.23% of ballots)
- Write-in — 74 approvals (0.36% of ballots)
Total: 20,674 ballots (16,832 total approvals)

STAR results

2022-11-08_SanFrancisco-BOARD_OF_SUPERVISORS_DISTRICT_10 STAR results permalink:
🔗https://abif.electorama.com/id/2022-11-08_SanFrancisco-BOARD_OF_SUPERVISORS_DISTRICT_10/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: SHAMANN WALTON
Finalists: SHAMANN WALTON vs BRIAN SAM ADAM
Runoff result:
- SHAMANN WALTON: 12,188 votes (59.0%)
- BRIAN SAM ADAM: 4,602 votes (22.3%)
- No preference: 3884 voters (18.8%)
Total stars allocated: 42,309
Total ballots: 20,674

★★★★★★

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(one star above is approximately 846 stars allocated by voters)

First round:
- ★#0: SHAMANN WALTON received 26,978 stars (63.8%) from 14,752 voters (71.4%)
- ★#1: BRIAN SAM ADAM received 14,702 stars (34.7%) from 10,065 voters (48.7%)
- ★#2: Write-in received 629 stars (1.5%) from 385 voters (1.9%)
Finalists:
- ★SHAMANN WALTON (✅ winner) preferred by 12,188 of 20,674 voters
- ★BRIAN SAM ADAM preferred by 4,602 of 20,674 voters
- ★No preference between the finalists: 3884

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

Condorcet/Copeland results

2022-11-08_SanFrancisco-BOARD_OF_SUPERVISORS_DISTRICT_10 Condorcet/Copeland results permalink:
🔗https://abif.electorama.com/id/2022-11-08_SanFrancisco-BOARD_OF_SUPERVISORS_DISTRICT_10/pairwise#pairwise

Winner: SHAMANN WALTON
Runner-up: BRIAN SAM ADAM (beats all other candidates except SHAMANN WALTON)
Smallest margin: BRIAN SAM ADAM over Write-in (9,998-288; margin: 9,710)
Largest margin: SHAMANN WALTON over Write-in (14,671-283; margin: 14,388)
Pairwise ties: none
Total ballots: 20,674

Win-loss-tie (Condorcet/Copeland) table

2022-11-08_SanFrancisco-BOARD_OF_SUPERVISORS_DISTRICT_10 w-l-t table permalink:
🔗https://abif.electorama.com/id/2022-11-08_SanFrancisco-BOARD_OF_SUPERVISORS_DISTRICT_10/pairwise#wlt

BOARD OF SUPERVISORS DISTRICT 10 (SanFrancisco; 2022-11-08) pairwise matchups
SHAMANN WALTON (2-0-0)	SHAMANN WALTON 2 victories ⇣
BRIAN SAM ADAM (1-1-0)	SHAMANN WALTON: 12,188(59.0%) BRIAN SAM ADAM: 4,602(22.3%) (No preference: 3,884; 18.8%)	BRIAN SAM ADAM ⇽ 1 loss / 1 victory^† ⇣
Write-in (0-2-0)	SHAMANN WALTON: 14,671(71.0%) Write-in: 283(1.4%) (No preference: 5,720; 27.7%)	BRIAN SAM ADAM: 9,998(48.4%) Write-in: 288(1.4%) (No preference: 10,388; 50.2%)

Pairwise tournament (Copeland ordered)

2022-11-08_SanFrancisco-BOARD_OF_SUPERVISORS_DISTRICT_10 pairwise diagram permalink:
🔗https://abif.electorama.com/id/2022-11-08_SanFrancisco-BOARD_OF_SUPERVISORS_DISTRICT_10/pairwise#dot

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

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