Instant-runoff voting

related topics
{government, party, election}
{rate, high, increase}
{game, team, player}
{math, number, function}
{system, computer, user}
{work, book, publish}
{law, state, case}
{school, student, university}
{theory, work, human}
{language, word, form}
{disease, patient, cell}

Instant runoff voting (IRV) or the Alternative Vote (AV) is a voting system that elects one winner by ranked choice voting. Instant runoff voting is designed to more accurately represent voter choice than First-past-the-post voting. As a form of preferential voting, voters mark candidates in order of preference with the numbers 1, 2, 3, etc. IRV is considered mathematically superior to First-past-the-post in single-person elections as it eliminates vote splitting, thereby reducing concerns about tactical voting and strategic nomination (Arrow's Impossibility Theorem).

The winner is decided as follows:
1) In the first round, votes are counted by tallying first preferences (in the same way as plurality voting, or First-past-the-post).
2) If no candidate has a majority of the votes, the candidate with the fewest number of votes is eliminated and that candidate's votes are counted at full value for the remaining candidates according to the next preference on each ballot.
3) This process repeats until one candidate obtains a majority of votes among the remaining candidates.

Contents

related documents
Prime Minister of the United Kingdom
Joe Clark
Politics of the Republic of China
Sinn Féin
Liberal Party (UK)
Liberal Party of Canada
Gerrymandering
Margaret Thatcher
Chen Shui-bian
Political status of Taiwan
Silvio Berlusconi
Australian Democrats
Anti Revolutionary Party
Separation of powers
History of Ecuador
Vladimir Putin
Parliament of the United Kingdom
Paul Martin
Australian Labor Party
British National Party
Politics of the United States
Jimmy Carter
François Mitterrand
Fianna Fáil
Charles Tupper
Woodrow Wilson
Hugo Chávez
Voting system
Republic
People's Party for Freedom and Democracy