Ganesh Sittampalam (hsenag) wrote,
Ganesh Sittampalam

Scottish election

 It's interesting - and could well turn out very significant for the future of the UK - that in a "proportional" system the SNP got 53% of the seats with 45% of the vote.

The main reason for this is that a lot of "top-up" votes went to lots of small parties, none of which got enough to win a seat. For example, in Central Scotland, 12% of the votes went to minor parties. Also, the proportionality is within each of a number of relatively small regions, rather than across the whole of Scotland.

Then, the d'Hondt system for distributing seats proportionally tends to favour larger parties: it keeps the ratio between actual seats and ideal seats as close to 1 as possible, rather than keeping the absolute magnitude of the difference close to 0. In Central Scotland, the last seat was distributed to the SNP, leaving them with 56% of the seats compared to 46% of the votes, a ratio of 1.21. If it had gone to Labour, it would have had 44% of the seats compared to 35% of the votes, but a ratio of 1.24.
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