Upon cursory reflection and in response to my strong opposition to any nonmonotonic method and to any method that fail to treat all voters' votes equally, the only proportional method I know I would support for legislative representation would be the party list system where candidates appear only on one list, where parties can cross-endorse another party's list instead of presenting their own list for any particular contest. But I don't know how fractional left-over vote shares are handled when this system fails to initially elect all the seats with the required vote share per seat. Is that when two or more parties join forces to elect the rest of the seats and haggle over who fills them?
Are there any other proportional methods besides the party list system that are monotonic and treat all voters' votes equally (unlike IRV and STV where some voters' votes rankings are counted when it would matter and some are not)? Kathy ---- Election-Methods mailing list - see http://electorama.com/em for list info
