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hare_voting_procedure [2008/01/31 11:18]
jtkorb
hare_voting_procedure [2009/02/09 15:07] (current)
jtkorb
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 ~~NOTOC~~ ~~NOTOC~~
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 ====== Hare Voting Procedure ====== ====== Hare Voting Procedure ======
  
-The [[http://​sof.uchicago.edu/​hare|Hare System of Proportional Representation]] ​(also described as the [[http://​en.wikipedia.org/​wiki/​Hare_quota Hare Quota]]) ​is a variant ​of the [[http://​en.wikipedia.org/​wiki/​Single_transferable_vote|Single Transferable Vote (STV)]] preferential voting system. ​ It is "​preferential"​ in the sense that voters rank the order of their chosen candidates (using, say, numbers 1-5), rather than using an unranked mark (e.g., one or more "​X"​s). ​ A common application is in the selection of committees, in which multiple winners must be chosen from a set of available candidates.+The [[http://​sof.uchicago.edu/​hare|Hare System of Proportional Representation]] is a procedural description ​of the [[http://​en.wikipedia.org/​wiki/​Single_transferable_vote|Single Transferable Vote (STV)]] preferential voting system. ​ It is "​preferential"​ in the sense that voters rank the order of their chosen candidates (using, say, numbers 1-5), rather than using an unranked mark (e.g., one or more "​X"​s). ​ A common application is in the selection of committees, in which multiple winners must be chosen from a set of available candidates. ​  
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 +(Note: The quota calculation described in this document and used in the associated software is actually based on the [[http://​en.wikipedia.org/​wiki/​Droop_quota|Droop Quota]], not the [[http://​en.wikipedia.org/​wiki/​Hare_quota|Hare Quota]]. ​ The term //Hare// is retained here as the common name for //Single Transferable Vote// despite this inaccurate characterization.)
  
 ====== Background ====== ====== Background ======
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 The first step in the process is to divide the ballots into sets based on the first candidate listed on each ballot. The first step in the process is to divide the ballots into sets based on the first candidate listed on each ballot.
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 ===== Selection Step ==== ===== Selection Step ====
  
-In order to be selected, a candidate must have a minimum number of votes, called the //quota//, which is roughly the number of votes cast divided by the number of positions to be filled. ​ More precisely, the College of Science defines the //quota// to be //(votes cast + 1)/(number of positions + 1)// rounded up.+In order to be selected, a candidate must have a minimum number of votes, called the //quota//, which is roughly the number of votes cast divided by the number of positions to be filled. ​ More precisely, the College of Science defines the //quota// to be //(votes cast + 1)/(number of positions + 1)// rounded up.  (As a side note, this quota calculation is actually closer to the "​Droop"​ quota than the "​Hare"​ quota, but we retain the older terminology to apply to the entire Single-Transferable-Vote process.)
  
   while there is a candidate that has the minimum number of votes   while there is a candidate that has the minimum number of votes
hare_voting_procedure.1201807132.txt.gz · Last modified: 2008/01/31 11:18 by jtkorb