Board of Supervisors District 8 (SanFrancisco; 2018-11-06)

🔗 2018-11-06_SanFrancisco-Board_of_Supervisors_District_8 (tags: { from-bolson , actual , 2018 , 2018-11 , SF , SanFrancisco_CA , SanFrancisco-2018 , CA })

Below is the ABIF from the "2018-11-06_SanFrancisco-Board_of_Supervisors_District_8" election (Board of Supervisors District 8 (SanFrancisco; 2018-11-06))

ABIF submission area (show)

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/2018-11-06_SanFrancisco-Board_of_Supervisors_District_8

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	RAFAEL MANDELMAN
FPTP	RAFAEL MANDELMAN
Approval	RAFAEL MANDELMAN
STAR	RAFAEL MANDELMAN
Condorcet/Copeland	RAFAEL MANDELMAN

OFF ON tabbed view

IRV/RCV results

2018-11-06_SanFrancisco-Board_of_Supervisors_District_8 IRV/RCV result permalink:
🔗https://abif.electorama.com/id/2018-11-06_SanFrancisco-Board_of_Supervisors_District_8/IRV#IRV

IRV/RCV Winner: RAFAEL MANDELMAN with 38,106 votes (79.3%) in final round
Runner-up: LAWRENCE ''STARK'' DAGESSE with 3,911 votes (8.1%) in final round
Exhausted ballots in final round: 6,032 (12.6%)
Number of rounds: 1
Ballots counted in final round: 42,017 (87.4%)
Majority of ballots: 24,025 (50.0%)
Total ballots: 48,049

Round 1
Overview: Active ballots: 48,049 (100.0%) Exhausted ballots: 6,032 (12.6%) Counted ballots: 42,017 (87.4%) Winning threshold: 21,009 (43.72%)
IRV/RCV winner: RAFAEL MANDELMAN: 38,106 (79.3%)✅ →
LAWRENCE ''STARK'' DAGESSE: 3,911 (8.1%) (🛑eliminated) →

FPTP result

"FPTP" is "First-past-the-post", also known as "plurality" or "choose-one"
2018-11-06_SanFrancisco-Board_of_Supervisors_District_8 FPTP results permalink:
🔗https://abif.electorama.com/id/2018-11-06_SanFrancisco-Board_of_Supervisors_District_8/FPTP#FPTP

FPTP Winner: RAFAEL MANDELMAN with 38,106 first-place votes (79.3%)
Runner-up: LAWRENCE ''STARK'' DAGESSE with 3,911 first-place votes (8.1%)
Margin of victory: 34,195 votes (71.2 percentage points)
First-place votes
- RAFAEL MANDELMAN: 38,106 votes (79.3 %)
- LAWRENCE ''STARK'' DAGESSE: 3,911 votes (8.1 %)
Blanks: 6,032 (12.6 %)
Total ballots: 48,049

Approval voting results

2018-11-06_SanFrancisco-Board_of_Supervisors_District_8 approval voting results permalink:
🔗https://abif.electorama.com/id/2018-11-06_SanFrancisco-Board_of_Supervisors_District_8/approval#approval

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Note — Approval counts estimated from 48,049 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: RAFAEL MANDELMAN and LAWRENCE ''STARK'' DAGESSE. 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: 48049}
{version: "0.1"}
{ballotcount_abif_metadata: "48049"}
{is_ranking_to_rating: true}
#------ candlines ------
=[RAFAEL MANDELMAN]:[RAFAEL MANDELMAN]
=[LAWRENCE ''STARK'' DAGESSE]:[LAWRENCE ''STARK'' DAGESSE]
#------- votelines ------
22334:[RAFAEL MANDELMAN]/1
8629:[RAFAEL MANDELMAN]/1
5795:[RAFAEL MANDELMAN]/1
1746:[LAWRENCE ''STARK'' DAGESSE]/1
1027:[LAWRENCE ''STARK'' DAGESSE]/1
532:[LAWRENCE ''STARK'' DAGESSE]/1
487:[RAFAEL MANDELMAN]/1
458:[LAWRENCE ''STARK'' DAGESSE]/1
443:[RAFAEL MANDELMAN]/1
418:[RAFAEL MANDELMAN]/1
103:[LAWRENCE ''STARK'' DAGESSE]/1
45:[LAWRENCE ''STARK'' DAGESSE]/1

Approval Winner: RAFAEL MANDELMAN
Approval Results:
- RAFAEL MANDELMAN — 38,106 approvals (79.31% of ballots) (✅ winner)
- LAWRENCE ''STARK'' DAGESSE — 3,911 approvals (8.14% of ballots)
Total: 48,049 ballots (42,017 total approvals)

STAR results

2018-11-06_SanFrancisco-Board_of_Supervisors_District_8 STAR results permalink:
🔗https://abif.electorama.com/id/2018-11-06_SanFrancisco-Board_of_Supervisors_District_8/STAR#STAR

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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 2 candidates, so the 1st choice gets 1 points, the 2nd choice gets 0 points, etc. These Borda scores are then used as STAR ratings for tabulation by STAR.

STAR winner: RAFAEL MANDELMAN
Finalists: RAFAEL MANDELMAN vs LAWRENCE ''STARK'' DAGESSE
Runoff result:
- RAFAEL MANDELMAN: 38,106 votes (79.3%)
- LAWRENCE ''STARK'' DAGESSE: 3,911 votes (8.1%)
- No preference: 6032 voters (12.6%)
Total stars allocated: 42,017
Total ballots: 48,049

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(one star above is approximately 840 stars allocated by voters)

First round:
- ★#0: RAFAEL MANDELMAN received 38,106 stars (90.7%) from 38,106 voters (79.3%)
- ★#1: LAWRENCE ''STARK'' DAGESSE received 3,911 stars (9.3%) from 3,911 voters (8.1%)
Finalists:
- ★RAFAEL MANDELMAN (✅ winner) preferred by 38,106 of 48,049 voters
- ★LAWRENCE ''STARK'' DAGESSE preferred by 3,911 of 48,049 voters
- ★No preference between the finalists: 6032

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

Condorcet/Copeland results

2018-11-06_SanFrancisco-Board_of_Supervisors_District_8 Condorcet/Copeland results permalink:
🔗https://abif.electorama.com/id/2018-11-06_SanFrancisco-Board_of_Supervisors_District_8/pairwise#pairwise

Winner: RAFAEL MANDELMAN
Runner-up: LAWRENCE ''STARK'' DAGESSE (beats all other candidates except RAFAEL MANDELMAN)
Smallest margin: RAFAEL MANDELMAN over LAWRENCE ''STARK'' DAGESSE (38,106-3,911; margin: 34,195)
Largest margin: RAFAEL MANDELMAN over LAWRENCE ''STARK'' DAGESSE (38,106-3,911; margin: 34,195)
Pairwise ties: none
Total ballots: 48,049

Win-loss-tie (Condorcet/Copeland) table

2018-11-06_SanFrancisco-Board_of_Supervisors_District_8 w-l-t table permalink:
🔗https://abif.electorama.com/id/2018-11-06_SanFrancisco-Board_of_Supervisors_District_8/pairwise#wlt

Board of Supervisors District 8 (SanFrancisco; 2018-11-06) pairwise matchups
RAFAEL MANDELMAN (1-0-0)	RAFAEL MANDELMAN 1 victory ⇣
LAWRENCE ''STARK'' DAGESSE (0-1-0)	RAFAEL MANDELMAN: 38,106(79.3%) LAWRENCE ''STARK'' DAGESSE: 3,911(8.1%) (No preference: 6,032; 12.6%)

Pairwise tournament (Copeland ordered)

2018-11-06_SanFrancisco-Board_of_Supervisors_District_8 pairwise diagram permalink:
🔗https://abif.electorama.com/id/2018-11-06_SanFrancisco-Board_of_Supervisors_District_8/pairwise#dot

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

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