From a toy model to the double square root voting system

Details From a toy model to the double square root voting system From a toy model to the double square root voting system

2007-01-30

arxiv.org/abs/physics/0701338v3

Physics

Physics and Society

22 pages in latex, one figure in eps; final version to be published in Homo Oeconomicus

Scientific paper

We investigate systems of indirect voting based on the law of Penrose, in which each representative in the voting body receives the number of votes (voting weight) proportional to the square root of the population he or she represents. For a generic population distribution the quota required for the qualified majority can be set in such a way that the voting power of any state is proportional to its weight. For a specific distribution of population the optimal quota has to be computed numerically. We analyse a toy voting model for which the optimal quota can be estimated analytically as a function of the number of members of the voting body. This result, combined with the normal approximation technique, allows us to design a simple, efficient, and flexible voting system which can be easily adopted for varying weights and number of players.

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