Proportionality for Solid Coalitions: Difference between revisions
Proportionality for Solid Coalitions (view source)
Revision as of 02:51, 21 March 2020
, 4 years ago→Types of PSC
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=== Hare-PSC ===
k-PSC or Hare-PSC is a condition requiring a solid coalition of c candidates supported by k Hare quotas to be always elect at least <math>\min(c, k)</math> most-preferred candidates
=== Droop-PSC ===
k+1-PSC or Droop-PSC (since many authors call the [[Hagenbach-Bischoff quota]] a Droop quota) is the same as Hare-PSC but holds for
The main difference between Hare-PSC and Droop-PSC can be seen with an example: Suppose you can buy two boxes of pizza, with over 2/3rds of voters wanting Cheese pizza, and under 1/3rds of the voters wanting Pepperoni pizza. Hare-PSC would say that you should buy at least one box of Cheese pizza, but has no opinion on what you should buy for the second box, whereas Droop-PSC would say that you should buy two boxes of Cheese pizza. This can be explained as happening partially because if the 2/3rds group of cheese-preferring voters split themselves into two equally sized groups of over 1/3rd of voters each, then these "two" groups that want Cheese would each outnumber the group of under 1/3rds of voters that want Pepperoni.
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