Borda Count

Forest Simmons fsimmons at pcc.edu
Wed Jan 31 19:58:02 PST 2001


Suppose you have 16 candidates to rank.  You know how each of them stands
on the four issues that you consider vital.  No two have the same profile
on these issues, so if we represent "agrees with you" and "disagrees with
you" by the letters a and d respectively, the 16 candidates can be
identified by their profiles:  aaaa, aaad, aada, aadd, adaa, adad, adda,
addd, daaa, daad, dada, dadd, ddaa, ddad, ddda, dddd

In an informal non-binding poll you are asked to rate them on a scale of
zero to 100%, so naturally you rate them in proportion to the number of
issues on which they agree with you (assuming all of the issues are
equally important to you).

aaaa gets 100%
addd, dadd, ddad, ddda get identical ratings of 75%
aadd, adad, adda, daad, dada, ddaa get identical ratings of 50%
daaa, adaa, aada, aaad  get identiacl ratings of 25%
dddd gets 0% .


Next, in another informal non-binding poll you are asked to rank the
candidates.

Since you cannot distinguish all of them on the issues, you use looks and
personality to break up the groups with identical ratings:

aaaa > aaad > aada > ... > dddd

The second pollster immediately converts your rankings to a rating via the
Borda Count with  rates between 0/15 and 15/15.

Which would you consider to be a more accurate representation of your
estimation of the candidates' abilities to represent your viewpoint in
the legislature? 

Forest



More information about the Election-Methods mailing list