[EM] 04/05/02 - Monotonicity is `Much Ado About Nothing':

Donald Davison donald at mich.com
Fri Apr 5 11:32:21 PST 2002


04/05/02 - Monotonicity is `Much Ado About Nothing':

Greetings list,

My claim that your examples are unrealistic has to do with the lower choices.

Below are ballots from one ward of a Preference Voting/STV election in the
city of Cambridge, Mass.  These are real ballots from a real election in
the real world.  The lower choices are also real.

Your assignment, if you care to accept, is to work all these ballots as an
IRVing election and then make your two percent changes to the ballots so as
to prove non-monotonicity.  Be wary of only using the ballots of only a few
candidates.  You may not have enough lower choices from the few to suit
your needs.  The lower choices of these ballots are divided between
nineteen candidates.

If you object to using Preference Voting ballots as an IRVing election,
then I suggest that you run the ballots as a Preference Voting election,
make your two percent changes, prove your non-monotonicity.  Preference
Voting is also accused of being non-monotonic.


But, even if you are able to show non-monotonicity, I still contend that
after you make changes, the election becomes a new and different election
with possible new results.

In other words, non-monotonicity is `Much Ado About Nothing'.


Regards, Donald Davison

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Date: Fri, 14 Feb 1997 15:19:39 -0500 (EST)
Subject:  Cambridge Election


01,19,02              01,07,02,19,09,08,18,13,15   [31 total]
01,13                 01,19,08,14,16,11,17,07,13,15
01,02,14,16           01,15,07,08,19,02,09
01,19,07,09,16        01,19,02,18,07,09,17
01,19,02,09,07,08     01,07,09,19,18,02
01,07,02,19           01,19,09,07,02,18,15,16,08
01,07,19,09           01,19,09,02,07,15,18,08,16
01,14,19,02,11        01,02,07,19,09,18
01,07,08              01,02,18,07,09,19,16,15
01,02,19              01,19,07,02,09,15,16,08
01,09,18,19,02        01,19,07,09,02,08,16,11
01,02,19,07,09        01,19,07,02,07,09,12
01,02,07,15,16        01,02,10,07,18,19,08,15
01,19,07,09           01,09,19,02,07,08,18
01,19,09,07,18,02     01,15,19,02,09,18,08,07

01,02,19,09,07,18,15,14,03,04,05,06,10,11,13,12,08,16,17


02                    02,07,19,01,09,15,18,03,05,16  [51 total]
02,19                 02,19,01,09,07,18,15,08,16
02,01,19,09           02,08,19,09,07,15,16,01
02,19,07,09,01        02,19,01,07,09,15,08,14,16
02,01,19,09,07,18     02,07,19,08,01,09,18
02,01,19,09,07,18     02,08,11,14,19,07,01,17
02,15,11,12,06,13     02,14,19,07,01,08,16,09
02,16,01,07,19,03     02,19,13,11,08,05,09
02,19,07,01,09,15     02,19,07,08,09,18,01
02,19,07,09,15,04     02,19,07,08,01,15,09
02,08,19,16           02,09,01,07,19,18,16,06,15
02,19,01,07,09        02,19,01,07,09,08,18
02,19,11,07,09,16     02,19,01,16,07,08,09
02                    02,01,19,09,07,18,16
02,19,15,08,07,12     02,01,19,07,15,09,08
02,19,07,09,11        02,01,19,09,07,18,08
02,19,08,07,09,01     02,01,09,19,18,07
02,19,08,09           02,01,07,08,09,18
02,19,01,09,07        02,08,16,19,09,01
02,19,07,09,01        02,19,09,07,01,18
02,19,09,07,01        02,09,07,19,01
02,09,19,07,01        02,07,19,09,01
02,19                 02,19,01,09,07
02,11                 02,19,07,11,16
02,19                 02,19,09,01,07

02,01,19,07,09,08,05,18,15,03,04,06,10,12,11,14,13,16,17


03,04,06,10,17,05,12,14   [1]


04,16,10                  [1]


05,06,10                  [1]


06,12,08,14,15,17     06,14,16,17,11,15,02,13    [8]
06,11,17              06,12,15,08,17,13,14,16
06,03,17,13,12,10     06,12,13,14,11,17,16,15
06,11,13,17           06,12,13,11,14,17,16


07,01,19,09,18,02       07,09,18,16,19,01,02          [40]
07,02,09,19,18,01       07,15,08,09,19,01,02,18,05,04
07,09,08,19,01,02       07,09,19,01,02,16,11,14,15
07,19,18,01,02,09,11    07,19,09,01,02,18,16,15
07,15,19,08,02,09,01    07,02,08,01,19,18,09,15
07,16,08,19,15,02       07,15,19,02,01,09,18,08
07,15,02,19             07,01,19,02,09,15,18,16,08,11
07,15,08,02,19,09,01    07,19,08,15,01,02,18,09
07,15,02,19,09,01       07,01,09,18,19,02,15,16,08
07,09,02,18,19,01       07,09,19,15,02,01,08,18
07,19,09,01             07,15,02,08,19,01,09
07,01,09,19,02,18       07,19,02,15,01,09,08
07,11,16,19,05,02,14    07,19,08,09,01,02,18
07,19                   07,15,02,19,08,01,09
07,09,19,08,01,15       07,15,08,19,02,01,09
07,09,01,18,19,02       07,19,09,02,18,15,16
07,09,01,19,02,08       07,01,09,02,19,18,08
07,19,01,18,09,02       07,02,08,01,09,19,15
07,09,19,01,02,18       07,15,01,08,09,19,02
07,01,02,09,19
07,01,19,15,02,09,08,11,12,13,14,16,17,18,06,10,03,04,05


08,15,16                08,02,09,07,01,15,18,16,19       [31]
08,19,16                08,02,15,07,09,19
08,19                   08,19,05,13,11,01,03,07,10,18
08,07                   08,14,15,16,17,19,18,06,09
08,07,12,19             08,17,13,14,15,06,12,11,16
08,15,07,02             08,02,19,09,15,06,11,12,17,13,16,07
08,15,16,04             08,15,17,02,09,19,13,14,01
08,15,06,16             08,19,16,11,09,01,14,15,02
08,19,01,02,07          08,09,07,15,01,19,02,16
08,06,15,14,16,02,07    08,19,02,07,01,09,11
08,19,09,15,01,02       08,07,15,01,09,19,02,16
08,18,01,10,19,02,07    08,19,09,07,01,15,02
08,19,09,01,02,07,18
08,19,01,02,07,09       08,07,15,01,09,19,02,16
08,19,01,07,09,18       08,19,01,09,07,02,14,18
08,19,01,07,16,11       08,19,09,07,01,02,18,05


09,11,14,19           09,19,07,01,02,08,15     [17]
09,19,01,07,02        09,19,02,01,07,18
09,02,19,14,16        09,19,02,01,07,18
09,07,19,01,02        09,19,01,07,18,02
09,19,07,01,02        09,07,18,19,01,02
09,07                 09,08,19,07,02,01,18
09,02,19,07,01        09,19,18,07,02,01,17
09,19,18,07,02        09,07,19,01,02,15
09,19,01,07,02


10,16,18,04           10,12,06,05          [2]


11,14,17              11,17,15,14,12,06,03,10,13   [14]
11,14,17,06,13        11,13,17,14,06,12,08,16
11,17,14,16           11,08,14,16,18,01,07
11,17,16,02           11,14,12,15,16,17,19
11,14,02,16           11,14,17,15,04,06,13
11,14,08              11,14,13,17,04,06
11,15,08,12,17        11,14,15,02,13


12,13,11,14,17        12,14,11,17,19          [11]
12,14,16              12,06,13,15,16
12,16,14,17           12,06,13,16,14
12,17                 12,17,16,15,13,14,11,06
12,08,17              12,17,11,14,16

12,10,19,08,03,02,13,17,16,01,11,15,18,06


13,07,08,11           13,06,12,07,10,17,08         [10]
13,19,08,07,16        13,17,02,08,15,19,12,11,09
13,16,14,12           13,16,14,02,06,07,15
13,19,05              13,09,12,08,19,14,10
13,15,14              13,12,17,11,14


14,11,04              14,11,17,15,12,13,16,06,03,10,08   [78]
14,15,16,11           14,15,17,19,01,02,07,09,11,16
14                    14,11,17,06,16,15,12,03,04
14,11,17,06           14,13,15,11,17,06,12
14,17,11,16,12        14,19,17,02,01,16,15,07,09
14,11,13,01,15,16     14,08,01,17,16,15,12
14,11,17,16,15        14,17,19,16,11,12,01,05,09
14,16,02              14,06,16,15,11,12,17,08,13
14,17,06,11,15,16     14,17,15,11,16,12,13
14,02,19,08           14,11,15,13,17,16,12,06,08
14,06,10,13,01,18     14,16,11,12,17,15,10,03,04,06,13,05,08
14,06,17              14,11,17,06,15,16,12,03,04
14,19,02,01           14,16,17,15,12,11,19,02
14,11,15,16,13        14,15,02,11,13,06,04
14,15,16,11,12        14,11,13,15,17,16,18
14,15,17,11,13        14,15,16,11,17,12,06
14,17,11,13,06        14,17,15,11,08,13,12,06,16
14,12,11,15,17,08     14,16,04,06,08,12,13
14,15,09,11           14,13,11,15,17,02,08,12
14,15                 14,19,11,07,09,17,02,01,15,16,08,12
14,15,02,11           14,11,15,17,02,12,07
14                    14,15,16,06,17,13,11,12,05
14,11,15              14,13,17,06,11,16,12
14,17,15,07           14,16,17,19,04,15
14,16,08,11           14,06,11,17,16,08
14,09,12              14,17,11,16,13,15,04
14,17,06              14,13,06,11,17,12,16
14,16,08              14,15,16,06,17,11,12
14,15,11,16           14,15,17,06,11,12,16
14                    14,02,06,13,15,17,16,11,12,19
14,17,01,07,19        14,17,11,12,16,13,15
14,06,17,13           14,09,02,15,01,19,07,17,11
14,02,16              14,16,15,17,07,02,09,11,19
14,17,16,11,13        14,13,11,15,16,02
14,15,11,13,16        14,11,09,02,15,17
14,15,17,11,13        14,17,08,09,11,15
14,17,13,08,11        14,15,07,02,19,09
14,15,16,11,06
14,15,16,06,02,12,13,19,09,17,10,18,03,04,05,07,08,11,01
14,15,16,02,01,19,03,04,05,06,07,08,09,10,12,13,17,18
14,16,06,13,15,18,17,09,07,05,08,10,01,03,04,02,12


15,14,17,16,06,11     15,14,16,06,11,12,13            [28]
15,14,13,06,11        15,07,08,16,04,05,19,02,01,09
15,01,07              15,14,16,11,12,13,17,08,06
15,14,11,17,12        15,07,11,01,17,02,19,16
15,16,08              15,18,19,02,01,09,07,08
15,13,14,07,11        15,19,12,02,09,07,11
15,02,01,07,19,16     15,07,19,01,02,09
15,14,08              15,16,14,02,08,19,06,13,07,12
15                    15,13,14,17,11,06,08
15,17,12,14,06        15,18,09,02,07,19,01,08
15,14,06              15,08,18,09,01,02,19,16,10,07,17
15,07,16              15,07,16,08,19,02,01,09
15,14,16,17,11        15,17,14,02,11,12,04,07,09
15,06,14,11,08        15,02,07,01,09,19,08


16                    16,15,13,14,11,06,17     [17]
16,14,18              16,06,14,02,01
16,14,15,17           16,15,01,09,07
16,19,09,07,08        16,14,15,17,11,12,13
16,19,01,13,14        16,14,15,11,17,06,12,13
16,14,12,01,11        16,14,15,08,11
16,14,17              16,19,01,14,08,02,11,12
16,05,19,02,07        16,12,07,06
16,14,11,17,02


17,14,16,06           17,14,10,13,12,06,16      [43]
17,13,12,03,06        17,13,11,15,14,12,16
17,11,13,14,15        17,14,11,16,15,08
17,11,13,14,15        17,14,11,12,10,06,13
17,16,14,08,11,15     17,12,14,13,11,06
17,11,12,13           17,14,16,11,06,12,13,04,05,10,03
17,06,05,13,14        17,11,12,14,06,15,16,13,08
17                    17,06,14,11,13,10,12,16,03
17,14                 17,11,14,12,10,06,13,16
17,11                 17,13,11,06,12,10,03,14
17,13                 17,06,14,13,11,15,16,12
17,11,14              17,18,16,11,10,12,14,02
17,07,14              17,05,19,01,13,08,06
17,14,11              17,06,14,16,11,12,04
17,15,14              17,11,14,06,12,13,10
17,11,14,12           17,06,14,13,16,15,11
17,16,13,15           17,11,14,12,10,06,13,16
17,14,08,05           17,14,15,11,06,16,12,08,13
17,13,11,15,07        17,14,15,16,11,06,12,13,08
17,14,04,05,19        17,13,11,14,12,06,15,10,03
17,14,16,13,12        17,11,14,05,08,13

17,16,06,11,13,14,12,01,08,02,18,04,03,05,10,07,19,09


18,01,07,09,19,16     18,01,02,07,09,19,08         [4]
18,07,19,01,09,02     18,01,02,07,09,19,11,14


19,09,07,02           19,08,11,12,14,16,17,09,07     [127]
19                    19,02,01,07,18,12,08
19                    19,08,07,02,17,09,11,16,14,10
19,08,01,09,07        19,02,09,01,07,10,18
19,13,02,09,07        19,09,07,01,02,15,16,08,18
19,02,01,07           19,02,09,01,07,16,08,15
19,07,01              19,08,01,09,07,18,15,11
19,07,01,02,09        19,02,09,07,01,18,15,08
19,01,07,18,02,09     19,09,01,07,02,18,16
19,07,09,02,01,08     19,02,07,01,09,18,16
19,09,01,07,02,18     19,07,02,09,01,11,08
19,02                 19,09,15,01,02,13,14
19,07,09,01,02,08     19,15,07,02,01,08,09
19,07,04,09,11,18     19,07,09,01,02,08,16
19,08,11,13,02,05     19,02,09,18,01,07,08
19,08,01,09,18,02     19,05,06,07,09,08,15
19,18,07,09,          19,01,02,07,09,14,15,16,11
19,02                 19,02,01,07,09,08,16,15,18
19,01,07,09,02        19,16,17,08,09,06,14,13,12
19,02,01,09,07,03     19,09,08,01,02,07,15,18
19,01,02,07,08        19,08,02,07,15,09,18,01
19,09,08,02,01,07     19,02,01,09,07,14,16,15,08
19,01,07,09           19,15,07,01,09,02,08
19,07,02,09,18        19,01,11,08,09,02,07
19,13,14,15           19,02,07,01,17,15,09,13,18
19,02,07,09,01        19,15,14,09,07,17,02,11,01
19,02,01,07,09,16     19,02,07,08,01,03,15,18
19,01,02,09,07,18     19,02,07,09,01,18,08,15
19,07,09,18,01,02     19,02,08,07,15,12,09,10,16,01
19,02,09,07,01,08     19,02,01,07,09,15,08,18,05,10,16,14,11
19,02,14,16,18,10     19,02,09,01,12,08,07,15,11
19,09,07,01,02,08     19,02,09,01,07,15,08,18
19,02,08,07,09        19,02,08,16,12,01,09,11
19,14,11,07,02        19,07,02,01,18,09,15,08,16
19,09,07,01,02,08     19,08,07,09,01,02,03,11,16
19,02,01,07,09,16     19,07,08,16,09,11,05,02,14,15
19,01,07,09,02        19,08,02,18,05,14,17,01,09,11
19,15,14              19,16,02,09,08,01,07,18
19,02,01,09,07,08     19,01,02,07,09,08
19,02,18,01,07        19,01,02,08,09,07
19,02,09,01,07        19,01,02,07,09,03
19,02,01,09,07,18     19,02,09,18,07,01
19,02,07,13           19,01,07,09,02,18
19,02                 19,01,02,07,09,08
19,02,07              19,01,15,02,07,08,12,16
19,02                 19,01,02,09,08,12,15,05
19,02,08              19,01,07,09,02,15,08
19,02,01,07,09        19,01,02,07,09,08,15,12
19,02,01,18,07        19,01,09,07,02,03,18
19,01,02,09,07        19,01,07,09,02,16,14,08,03,06,05,04
19,01,16,07           19,01,02,07,18,08,11,13,05
19,01,09,07,18        19,08,02,14,11,09,16
19,01,02,15,07        19,02,07,01,09,04
19,01,07              19,09,02,07,01,18,08,16,15
19,09,07,01,02,03     19,07,01,08,13,09
19,09,01,07,02        19,07,09,01,18,02
19,09,01,07,08,02     19,07,01,09,02,18
19,09,16,07,01,08     19,07,15,08,02,18
19,09,01,08,07,02     19,17,02,13,14,08
19,09,08              19,02,09,18,07,01,11,17,14,15
19,01,03,02           19,07,02,01,09
19,07,02              19,09,01,15,07,12,02,08,11

19,02,07,01,09,08,15,18,05,14,04,03,11,10,12,06,13,16,17
19,02,09,07,01,15,18,08,05,04,10,12,14,11,03,13,16,17,06
19,02,01,09,07,18,04,08,16,15,12,11,10,05,03,14,06,13,17

end

Regards,
   Donald Davison, host of New Democracy at http://www.mich.com/~donald

   +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
   |                        Q U O T A T I O N                          |
   |  "Democracy is a beautiful thing,                                 |
   |        except that part about letting just any old yokel vote."   |
   |                           - Age 10 -                              |
   +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
    APV   Approval Voting
    ATV   Alternative Vote  aka  IRV Instant Runoff Voting  aka  IRVing
    FPTP  First Past The Post  aka  Plurality
    NOTA  None of the Above  aka  RON Re-Open Nominations
    STV   Single Transferable Vote  aka  Preference Voting  aka  Choice Voting
          aka  Hare Clarke  aka  Hare Preferential Voting

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