As the UK votes on voting, a Guardian article explains:
A theorem (proved by Allan Gibbard and Mark Satterthwaite) tells us about elections designed to find a single winner, as is the case when a constituency elects its MP. The theorem says that, if there are three or more candidates, any voting system which is not a dictatorship and which allows the possibility of any candidate winning, is susceptible to tactical voting (where voters have an incentive to vote in a way that doesn’t reflect their personal preferences).
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May 5, 2011 at 7:41 pm
Frank
Still haven’t seen this anywhere: https://cheaptalk.org/2010/10/25/popularize-the-myerson-satterthwaite-theorem/
May 7, 2011 at 8:49 pm
Anonymous
The dinner that Hector Chade and I had with Mark and Alan might have been the highlight of my years at Michigan. Alan discussed his then current book on ethics
http://www.amazon.com/Thinking-How-Live-Allan-Gibbard/dp/0674011678
while ordering the $70 bottle of wine on the menu (footed by Hector and me, due to well-known university no alcohol rules).
May 7, 2011 at 8:50 pm
Lones Smith
Oops, that comment was by me!