Just to alert those who may be interested, I've added SODA-PR to the SODA page on electowiki<http://wiki.electorama.com/wiki/Simple_Optionally-Delegated_Approval#SODA-PR_.28proportional_representation_version_of_SODA.29> .
It includes some minor adjustments since the last time I expounded it here: Simplifying the ballot by including same-district candidates in a larger font, nearby-district candidates in a smaller font, and far-away candidates as write-ins only, is now part of the system by default. Random discards are repeated until the next candidate to be elected is the same twice in a row. That is intended as a compromise between the mathematical simplicity of ballot discarding and the deterministic nature of fractional reweighting. In most cases, it will not affect the result. Intercandidate can be conditional on being mutual, but not conditional on anything else. That should allow a reasonable, but not excessive, level of party discipline. It also notes the circumstances when this will give the same results as plurality, to argue that existing plurality winners will find this to be a relatively-good PR system. JQ
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