Proportional representation: Difference between revisions

A mixed compensatory system is an electoral system that is [[mixed electoral system|mixed]], meaning that it combines a plurality/majority formula with a proportional formula,<ref name=ACEMixSys>{{cite web|last1=ACE Project Electoral Knowledge Network|title=Mixed Systems|url=https://aceproject.org/ace-en/topics/es/esd/esd03/default|access-date=29 June 2016}}</ref> and that uses the proportional component to compensate for disproportionality caused by the plurality/majority component.<ref name=MassicotteSearch>{{cite report|first1=Louis|last1=Massicotte|title=In Search of Compensatory Mixed Electoral System for Québec|url=https://www.institutions-democratiques.gouv.qc.ca/publications/mode_scrutin_rapport_en.pdf|date=2004}}</ref><ref name=BochslerTerritory>{{cite book|first1=Daniel|last1=Bochsler|title=Territory and Electoral Rules in Post-Communist Democracies|chapter=Chapter 5, How Party Systems Develop in Mixed Electoral Systems|chapter-url=https://books.google.com/books?id=qkCBDAAAQBAJ|date=May 13, 2010|publisher=Palgrave Macmillan|isbn=9780230281424}}</ref> For example, suppose that a party wins 10 seats based on [[plurality voting|plurality]], but requires 15 seats in total to obtain its proportional share of an elected body. A fully proportional mixed compensatory system would award this party 5 compensatory (PR) seats, raising the party's seat count from 10 to 15. The most prominent mixed compensatory system is [[mixed member proportional representation]] (MMP), used in Germany since 1949. In MMP, the seats won by plurality are associated with single-member districts.