Social:Black's method

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Short description: Single-winner electoral system


Black's method is an election method proposed by Duncan Black in 1958 as a compromise between the Condorcet method and the Borda count. This method selects a Condorcet winner. If a Condorcet winner does not exist, then the candidate with the highest Borda score is selected.[1]

The method is rarely-used compared to Nanson's method, another compromise that blends Condorcet and Borda methods, while addressing more of the problems with the Borda count.

Properties

Among methods satisfying the majority criterion, Black's method gives the minimum power to the majority and hence the method is best at protecting minorities.[2]

Satisfied criteria

Black's method satisfies the following criteria:

Failed criteria

Black's method does not satisfy the following criteria:

References

  1. Black, Duncan (1958). The theory of committees and elections. Cambridge: University Press. 
  2. 2.0 2.1 Kondratev, Aleksei Y.; Nesterov, Alexander S. (2020). "Measuring Majority Power and Veto Power of Voting Rules". Public Choice 183 (1–2): 187–210. doi:10.1007/s11127-019-00697-1. 
  3. 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 Felsenthal, Dan S; Nurmi, Hannu (2018). Voting procedures for electing a single candidate : proving their (in)vulnerability to various voting paradoxes. Cham, Switzerland: Springer. ISBN 978-3-319-74033-1.