Jagiellonian Compromise
The Jagiellonian Compromise is a voting system for two tier voting bodies originally proposed in 2004[1] for the Council of the European Union as a way of achieving "one person, one vote" within the Union.
Reaction and explanation
The Compromise was analyzed by various authors[2][3][4] and received attention in the popular press.[5] The system is based on the square root law of Penrose, which implies that a priori voting power defined by the Penrose–Banzhaf index of a member of a voting body is inversely proportional to the square root of its size. Hence the number of votes obtained by a representative of a state with population
is proportional to
. Jagiellonian Compromise is based on a single criterion only. Decision of the Council of the Union of
Member States is taken if the sum of the weights of States voting in favour of a given proposal exceeds the qualified majority quota
equal to
For a generic distribution of population among States of the Union the optimal threshold
decreases with
as
.[6]
See also
References
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- ↑ Pukelsheim, Friedrich. Putting citizens first: Representation and power in the European Union in Institutional Design and Voting Power in the European Union ed. M. Cichocki, Ashgate, Farnham 2010, pp. 235-254
- ↑ E. Ratzer. On the “Jagiellonian compromise” – voting in the European Union, http://www.inference.phy.cam.ac.uk/ear23/voting/voting.pdf
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