Precinct-summability through seat capping
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Seat capping is a technique I've been working on developing for a little while now. It allows various multi-winner voting methods, including many proportional methods, to be made precinct-summable by limiting the number of seats that the voting method can fill. Many specific instances of seat capping have been discovered by others, but to my knowledge I am the first person to generalize this insight to a wide variety of voting methods, including allocated score (the current STAR-PR proposal), sequentially spent score, reweighted range voting, harmonic score voting, and Bucklin transferable vote.