Sequential proportional approval voting

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Sequential proportional approval voting (SPAV) or reweighted approval voting (RAV)^[1] is an electoral system that extends the concept of approval voting to a multiple winner election. It is a simplified version of proportional approval voting. It is a special case of Thiele's voting rules, proposed by Danish statistician Thorvald N. Thiele in the early 1900s.^[2] It was used (with adaptations for party lists) in Sweden for a short period from 1909-1921, and was replaced by a cruder "party-list" style system as it was easier to calculate.^[3]^[4]

^ Brams, Steven; Brill, Markus (2018). "The Excess Method: A Multiwinner Approval Voting Procedure to Allocate Wasted Votes". SSRN Electronic Journal. doi:10.2139/ssrn.3274796. ISSN 1556-5068. S2CID 53600917.
^ E. Phragmén (1899): "Till frågan om en proportionell valmetod." Statsvetenskaplig tidskrifts Vol. 2, No. 2: pp 87-95 [1] Archived 2015-06-18 at the Wayback Machine
^ Lewis, Edward G. (1950). "Review of Modern Foreign Governments". The American Political Science Review. 44 (1): 209–211. doi:10.2307/1950372. ISSN 0003-0554. JSTOR 1950372. S2CID 152254976.
^ Humphreys, John H. (2006-01-01). Proportional Representation: A Study in Methods of Election. Archived from the original on 2022-05-11. Retrieved 2022-05-11.