Multi-round voting
Ranked / preferential systems
Cardinal / graded systems
Proportional forms of ranked voting
Proportional forms of cardinal voting
Biproportional apportionment
Fair majority voting
Weighted voting
Non-compensatory mixed systems
Compensatory mixed systems
Other systems
Social choice theory
List of electoral systems
Effects of electoral systems
This is a list of electoral systems by country in alphabetical order. An electoral system is used to elect national legislatures and heads of state.
Single-winner system / single-member constituencies (non-proportional)
Multi-member constituencies, majoritarian (non-proportional)
Multi-member constituencies, semi-proportional
Multi-member constituencies, proportional
Mixed non-compensatory (semi-proportional)
Mixed compensatory (proportional or semi-proportional)
Indirect election
Other
Type of system
Type of representation:
Number of winners in a contest—whether single or multiple (more than one)
Winning formula:
Mixed systems use two or more of these methods, and produce chamber where different members are elected through two or more different election methods. (Mixed Member Proportional elects members through both first past the post and proportional.) Parallel voting systems, such as used in Egypt, are examples of mixed systems.
Type of vote used
First past the post uses single X voting.
Block voting uses multiple X voting, same as number of seats to fill.
STV and Instant-runoff voting use ranked votes.
List PR uses X voting.
Limited voting uses multiple X voting, not as many as number of seats to fill.
10 Senators co-opted by the other senators
First-past-the-post in single-member constituencies, in multi-member constituencies party with over 50% of vote gets all seats (party block voting), otherwise highest party gets half, rest distributed by largest remainder (Hare quota)
First-past-the-post party with over 50% of vote gets all seats in multi-member constituencies (party block voting), otherwise List PR (largest remainder, closed list)[24]
First-past-the-post in single-member districts and List PR in multi-member districts (Largest remainder)
80% of seats (rounded to the nearest integer) in each constituency are awarded to the party receiving the most votes (party block voting), remaining seats are allocated proportionally to other parties receiving over 10% (closed list, D'Hondt method)
10 districts
48 states, including Nebraska, use plurality basis to choose electoral college members for presidential general elections. Alaska and Maine use IRV.
Party nominees chosen by delegates allocated in state primaries with varying methods by state and party.
The shura held outside Quetta unanimously elected Mullah Mansour as the new emir of the Taliban
At the time of his appointment as Taliban chief by the Rahbari Shura (leadership council)
the Taliban rules by consensus among members of its Rahbari Shura
an autocratic political system that eschews democracy
Artículo 167: I. [...] Será proclamada a la Presidencia y a la Vicepresidencia la candidatura que haya reunido el cincuenta por ciento más uno de los votos válidos; o que haya obtenido un mínimo del cuarenta por ciento de los votos válidos, con una diferencia de al menos diez por ciento en relación con la segunda candidatura. II. En caso de que ninguna de las candidaturas cumpla estas condiciones se realizará una segunda vuelta electoral entre las dos candidaturas más votadas, en el plazo de sesenta días computables a partir de la votación anterior. Será proclamada [...] la candidatura que haya obtenido la mayoría de los votos.
60.—(1) The Legislative Assembly shall consist of—(a) the Speaker; (b) eighteen elected members, who shall be persons qualified for election in accordance with this Constitution and elected in the manner provided for in a law enacted for the purposes of section 93; and (c) the Deputy Governor and the Attorney General, ex officio.
Much of the data on Bulgaria from Central electoral committee - "Methods for determining the number of mandates in constituencies and the results of the vote" (in Bulgarian); A mathematical analysis of the system
Much of the data regarding which voting system is used is drawn from this 2002 report from the International Institute for Democracy and Electoral Assistance (IDEA).
Much of the data regarding the size of the parliaments comes from this 1997 report from the same Institute.
Some of the data has been updated since then.
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