-Aspen's historic May 5, 2009 IRV election audited as single ballots- 5/5/09 Aspen CO held an instant runoff election (IRV) for mayor and 2 council members. Interpreted contents of each ballot, scanned by True Ballot, were publicly released. Open records requests for a CD of image scans were denied. Aspen has been sued to protect records from destruction and to allow inspection of the scanned ballot files. A Court of Appeals ruling holds that unidentifiable ballots are public records.

Search this and related blogs

Saturday, March 20, 2010

Bullet Voting in Aspen's IRV Election - Memo by Millard Zimet

MEMORANDUM
To:       Aspen City Council
From:   Millard Zimet
Re:       Bullet Voting in the May 2009 Election
Date:   March 15, 2010
­­________________________________________________________________________

The purpose of this memo is to observe the actual voting data generated by Aspen’s May 2009 Mayoral and City Council IRV elections with regards to bullet voting, and to observe whether bullet voting impacted the outcomes of those elections.  This memo is expressly not to be construed as an attack upon any person, elected official, candidate, government official or entity, political party, or political persuasion.

The data in this memo is derived from the strings, which I have previously sent to you in Excel format.  If you want to replicate the data contained in this memo, please take those strings and use the “filter” function in Excel to sort the data.
[continues below the break]
I:         The Mayoral Election

This was an election to fill the position of Mayor, and there were four candidates.  There were 2528 ballots cast, and 541 ballots (21.4%) named only one candidate and left the rest of the choices blank.  So about one out of every five voters cast their ballot using the bullet voting pattern.

Table 1 shows how those 541 bullet votes were distributed among the candidates, and shows each candidate’s share of the bullet voting pool.

Table 1
                         Bullet Votes                           Share  

Ireland                         322                              59.5%
Marks                          136                              25.1%
Erspamer                       58                              10.7%
Kole                              18                               3.3%
Write-In                         7                                1.3%
                                 ====                              ======
Total                            541                              100%

Table 1 shows that about six out of every ten bullet voters in the Mayoral election bullet voted for Ireland. Ireland’s margin of 186 bullet votes over Marks by itself exceeded the number of bullet votes received by any other candidate (Mayor or Council races) in the May 2009 election.

The strings also allow one to observe the knowledge level of each candidate’s supporters (i.e., which supporters knew to bullet vote).  For this purpose I'm defining a "supporter" as a voter who gave a given candidate that voter's first place vote, and I’m measuring the percentage of each candidate’s first place votes that were derived from bullet votes; for purposes of this memo I’m going to call that percentage a given candidate’s “Bullet Voting Percentage”, and it shows which supporters knew to bullet vote.

Table 2 shows each candidate’s number of first place votes, number of bullet votes, and Bullet Voting Percentage.

Table 2

                      First Place Votes                     Bullet Votes                Bullet Voting %

Ireland             1089                                        322                              29.57%
Marks                877                                        136                              15.51%
Erspamer           421                                          58                              13.78%
Kole                  126                                          18                              14.29%


Table 2 shows that Ireland’s Bullet Voting Percentage of 29.57% is approximately twice as high as that of the other three candidates, indicating that his supporters were much more likely to know to bullet vote.

The strings also allow one to observe how each precinct produced bullet votes.  Table 3 shows, for each precinct, the number of ballots cast, the number of ballots that were bullet voted, the percentage of ballots within each precinct that were bullet voted, and that precinct’s share of the total bullet voting pool.

Table 3

Precinct           Total Ballots                BV Ballots      % BV in Precinct        Share

1                                  291                                75                  25.8%              13.9% 
2                                  305                                54                  17.7%              10.0%
3                                  314                                46                  14.6%                8.5%
4                                  585                              121                  20.7%              22.4%
Early                            794                              198                  24.9%              36.6%
Mail                             239                                47                  19.7%              8.7%
                                   =====                          ====                                       =====
Total                            2528                            541                  21.4%              100%

Table 3 shows that about one out of every four voters at Precinct 1 and at the early voting station at City Hall knew to bullet vote.  It also shows that the City Hall ballot box accounted for 36.6% of the bullet voting pool.

Table 4 shows how the bullet votes were distributed among the candidates in each precinct.

Table 4

            Precinct 1        Precinct 2        Precinct 3        Precinct 4     Early       Mail     Total   

Ireland             39              32                  36                   65               130        20        322     
Marks              20              12                    6                   34                 47        17        136
Erspamer         13                4                    4                   17                 16          4          58
Kole                  1                5                    0                     3                   4          5          18     
Write In             2                1                    0                     2                   1          1            7
                        ===          ===                ===               ===              ===       ===     ===
Total                75              54                   46                 121              198        47        541

Table 4 shows that at the City Hall early voting station Ireland received 130 bullet votes, or 65.7% of all bullet votes cast at that precinct.  Ireland received 374 first place votes from the early voting station, and so Ireland had a 34.8% Bullet Voting Percentage at that precinct.

II:        The Council Election

This was an election to fill two available Council seats, and there were nine candidates.  There were 2487 ballots cast, and 518 ballots (20.8%) named only one or two candidates and left the rest of the choices blank; this was the bullet voting pattern predicted by FairVote in their analysis dated January 20, 2009.  So once again about one out of every five voters cast their ballot using the bullet voting pattern.

For purposes of this section of this memo, a “bullet voted ballot” means a ballot that was cast for only one or two choices and left all other choices blank.  Likewise, a “bullet vote” means a vote cast in the #1 or #2 position on a given bullet voted ballot. 

Table 5 shows each candidate, the number of bullet votes they received, how the 931 total bullet votes were shared by percentage among the candidates, and the frequency with which a given candidate was named on any given bullet voted ballot (ie bullet votes per candidate divided by 518 bullet voted ballots).

Table 5

                                    Bullet Votes      Share             Frequency

Torre                           177                  19.0%              34.2%
D.  Johnson                 175                  18.8%              33.8%
J.  Johnson                   137                  14.7%              26.4%
Frisch                          129                  13.9%              24.9%
Behrendt                      119                  12.8%              23.0%
Kasabach                      92                    9.9%              17.8%
Wampler                       62                    6.7%              12.0%
Speck                           21                    2.3%               4.1%
Lasser                           19                    2.0%               3.7%
                                    ===                 ====
Totals                          931                  100%

Table 5 shows that the two candidates who received the most bullet votes and were named most frequently on bullet voted ballots were also the two winning candidates. 

Turning now to Table 6, and Bullet Voting Percentage, one can observe which candidate’s supporters knew to bullet vote.  For purposes of this analysis a “supporter” is a voter who gave a given candidate their first place vote.

In Table 6 the first column shows the total number of first place votes cast for each candidate.  The second column shows the number of each candidate's first place votes that came from bullet voted ballots.  The third column shows the percentage of each candidate's first place votes that came from bullet voted ballots, or Bullet Voting Percentage.

Table 6

                                    1st Place Votes        1st Place Bullet Votes                     BV%  

D. Johnson                               465                              87                                18.71%
J.  Johnson                               456                              87                                19.08%
Frisch                                      418                              98                                23.44%
Torre                                       385                            107                                27.79%
Behrendt                                  354                              64                                18.08%
Kasabach                                249                              41                                16.47%
Wampler                                   94                              22                                23.40%
Speck                                       38                                6                                15.79%
Lasser                                       27                                6                                22.22%

This table shows that Torre decisively benefited from bullet voting, as his supporters knew to bullet vote by a significant margin over the supporters of the other candidates.  Another interesting observation is that Derek Johnson received 88 second place bullet votes, which was more than his number of first place bullet votes; Jackie Kasabach also received more second place bullet votes than first place bullet votes.

Regarding precinct distribution, Table 7 shows, for each precinct: (i) the number of ballots cast at that precinct; (ii) the number of bullet voted ballots cast at that precinct; (iii) the % of ballots at a given precinct that were bullet voted; and (iv) the given precinct’s share of total bullet voted ballots (518).

Table 7

Precinct           Ballots             Bullet Voted   % Ballots that were BV's        Share

1                      290                                75                  25.9%                          14.5%
2                      300                                56                  18.7%                          10.8%
3                      307                                46                  15.0%                            8.9%
4                      571                              121                  21.2%                          23.4%
Early                794                              178                  22.4%                          34.4%
Mail                 225                                42                  18.7%                            8.1%
                        ====                           ===                                                     ===
Total                2487                            518                  20.8%                          100%

The data in Table 7 is comparable to the data in Table 3. Once again, voters at Precinct 1 were the most likely to bullet vote.  And once again by far the most bullet voted ballots were produced by the early voting station at City Hall.  

Table 8 shows how bullet votes (a #1 or #2 choice on an otherwise blank ballot) were distributed in each precinct to each candidate.

Table 8

            Precinct 1        Precinct 2        Precinct 3        Precinct 4        Early    Mail     Total   

Torre               30             20                     24                   42               48        13        177     
D. Johnson      22             20                     16                   53               58          6        175 
J. Johnson       19             11                     12                   30               55        10        137     
Frisch              21             13                       5                   33               43        14        129     
Behrendt         17             15                       6                   19               49        13        119     
Kasabach       14               7                       7                   18               39          7          92     
Wampler          4               5                       9                   15               23          6          62     
Speck              7               2                       0                     4                 7          1          21     
Lasser              2               4                       4                     3                 6          0          19
===               ====        ====               ====               ===            ===     ===       ===
Totals            136              97                    83                  217            328        70        931

Table 8 shows that at the key precinct, the City Hall ballot box, all the major candidates received a substantial number of bullet votes.  So while Table 4 shows that in the Mayor’s race there was a concentrated distribution of bullet votes from the City Hall ballot box, Table 8 shows a wider distribution in the Council races.

III:      Conclusion

About one out of every five voters in each election bullet voted.  The winning candidates in each election were the ones who received the most bullet votes.  The early voting ballot box at City Hall in each election produced by far the most bullet voted ballots.  The level of bullet voting knowledge of candidate supporters in each election was decidedly uneven, as some supporters knew to bullet vote a lot more than other supporters.  One must conclude that bullet voting impacted the outcome of each election.

While the Mayoral election was a single seat election and the Council election was a two seat election, and so the metrics are a bit different for each election, there are three common measurements that can be applied to all the candidates, namely: (i) number of bullet votes; (ii) percentage share of bullet votes a given candidate received in his/her election; and (iii) Bullet Voting Percentage (a/k/a supporter level of bullet voting knowledge).  Table 9 shows those three measurements for all of the candidates.

Table 9

                                        Bullet Votes                Share               BV%

Ireland                                     322                  59.5%              29.57%
Torre                                       177                  19.0%              27.79%
D. Johnson                              175                  18.8%              18.71%           
J. Johnson                               137                  14.7%              19.08%           
Marks                                     136                  25.1%              15.51%
Frisch                                     129                  13.9%              23.44%           
Behrendt                                 119                  12.8%              18.08%
Kasabach                                 92                    9.9%              16.47%
Wampler                                  62                    6.7%              23.40%
Erspamer                                 58                  10.7%              13.78%           
Speck                                      21                    2.3%              15.79%
Lasser                                     19                    2.0%              22.22%
Kole                                        18                    3.3%              14.29%                       

No comments: