Proportional representation: Difference between revisions

→‎Proportionality for Solid Coalitions Criterion: making this section into proper summary style
(Merging the #Definition and #Measures sections, and creating a #Gallagher index section)
(→‎Proportionality for Solid Coalitions Criterion: making this section into proper summary style)
Line 36:
Since the standard definitions of Proportional Representation do not apply to nearly all modern systems it has become common to define proportional representation in terms of passing some sort of criteria. There is no consensus on which criteria need to be passed for a parliament to be said to be proportional, though most can agree that a voting method that passes one of the [[weak forms of PSC]] (several of which are listed here) is at least semi-proportional. It is worth noting that because there are disagreements on how best to conceptualize of PR, some measures look at how much each voter likes their favorite candidate i.e. the one meant to "represent them" (such as [[Monroe's method]]) while others look at how satisfied each voter is with all of the elected representatives.
 
=== [[Proportionality for Solid Coalitions]] Criterion ===
{{main|Proportionality for Solid Coalitions}}
PSC: If a sufficiently-sized group (generally at least a Droop or Hare quota) prefer a set of candidates above all others, do at least a proportional number (being the number of quotas the group comprises rounded down to the nearest integer) of candidates from that set (supposing there are enough of them) get elected?
 
''Proportionality for Solid Coalitions'' is often abbreviated as "PSC". The definition: Ifif a sufficiently-sized group (generally at least a Droop or Hare quota) prefer a set of candidates above all others, do at least a proportional number (being the number of quotas the group comprises rounded down to the nearest integer) of candidates from that set (supposing there are enough of them) get elected?
 
===Proportional (Ideological) Representation Criterion===