Prepared by:
Joseph Malkevitch
Department of Mathematics
York College (CUNY)
Jamaica, New York 11451
email:
malkevitch@york.cuny.edu
web page:
http://york.cuny.edu/~malk
1. Given the election below:
Determine the winner (if there is one) using the methods listed. Should ties occur break the ties in some reasonable manner that you explain. Note: more preferred options are listed towards the top - in the direction of the arrow.
a. Plurality
b. Condorcet
(As part of your solution draw a digraph which shows who beats whom in the two-way races. Use a directed edge from X to Y if X beats Y in a two-way contest.)
c. Borda count
(as part of your solution construct a pairwise preference matrix. - which shows votes in a two-way race between the different candidate pairs)
d. Sequential run-off
e (Standard) Run-off
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f. Borda count sequential run-off
g. Coombs
h. Median approval (A ballot gives a point to each candidate who is at the median level or above.)